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PERSEUS MINING LIMITED Capital/Financing Update 2023

Aug 23, 2023

46513_rns_2023-08-22_d006b117-557f-4956-accd-9a3477f78a6e.pdf

Capital/Financing Update

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23 AUGUST 2023 NEWS RELEASE

PERSEUS MINING ANNOUNCES OPEN PIT AND UNDERGROUND ORE RESERVE GROWTH AT YAOURÉ

Perth, Western Australia/August 23, 2023/ Perseus Mining Limited (ASX/TSX: PRU) is pleased to announce an increase to CMA underground Ore Reserves beneath the existing CMA open pit, at its Yaouré Gold Mine in Côte d’Ivoire of 2.7 Mt at 3.46 g/t for 300 koz. The total CMA underground Ore Reserve is now estimated by Perseus to be 4.9 Mt at 3.51 g/t for 559 koz. The CMA orebody remains open down plunge and down dip below the current Indicated Mineral Resource, and further extensions to the CMA underground Ore Reserves are expected with future drilling during FY24.

Feasibility-level studies on the CMA deposit at Yaouré (approximately four hundred metres down dip from the base of the open pit) have confirmed the economic and technical viability of underground mining. Resource definition drilling during FY23 has added Mineral Resources and Ore Reserves down-dip of the CMA underground Pre-Feasibility Study (PFS) Ore Reserves and readers are referred to ASX release “Perseus Updates Mineral Resource and Ore Reserve Estimates” dated 28 August 2022 for additional details on the CMA underground PFS.

More widely spaced drilling below the CMA underground Ore Reserve has shown that mineralisation extends deeper allowing an extension to Inferred Mineral Resources at depth. Extension of Inferred Mineral Resources and continued drilling success down-dip, provides strong encouragement for further expansion of the CMA underground.

As well as growth to Ore Reserves for the CMA underground, a drill campaign of 22,084 metres during FY23 at the adjacent Yaouré open pit has resulted in 6.9 Mt at 1.82 g/t for 403 koz of additional Yaouré open pit Ore Reserves (separate to the CMA open pit). Yaouré open pit Ore Reserves now total 11.8 Mt at 1.49 g/t for 565 koz. The increase to Yaouré Open pit Ore Reserves is based upon conversion of Inferred Mineral Resources immediately beneath the existing Yaouré open pit to Indicated Mineral Resources.

CMA underground and Yaouré open pit Ore Reserve increases are in addition to the existing Ore Reserves, adding additional value and mine life to the Yaouré Gold Mine. The CMA underground Feasibility Study (FS) and the Yaouré open pit expansion will be released in Perseus’ upcoming Yaouré Gold Mine Life of Mine (LOM) plan.

HIGHLIGHTS

  • Indicated Mineral Resources at CMA underground have increased by 439 koz to 7.3 Mt at 4.17 g/t for 976 koz of contained gold, and Inferred Mineral Resources are estimated at 4.4 Mt at 3.4 g/t gold containing 485 koz of gold.

  • Underground Probable Ore Reserves estimated to date total 4.9 Mt of ore grading 3.51 g/t gold and containing 559 koz of gold, which is an increase for FY23 of 2.7 Mt at 3.46 g/t gold containing 300 koz of gold.

  • Yaouré open pit Indicated Mineral Resources have increased by 300 koz to 19.2 Mt at 1.27 g/t for 784 koz of contained gold, and Inferred Mineral Resources are estimated at 3.0 Mt at 1.3 g/t gold containing 124 koz of gold.

  • Yaouré open pit Probable Ore Reserves have increased in FY23 by 6.9 Mt at 1.82 g/t for 403 koz of gold, for a total of 11.8 Mt at 1.49 g/t gold containing 565 koz of gold.

  • Yaouré Gold Mine Ore Reserve increases at the CMA underground and the Yaouré open pit will extend the Yaouré Life of Mine (LOM) and all Ore Reserve additions are inside the mine fence and adjacent to the Yaouré processing facility. Perseus will prepare an updated LOM Plan for the Yaouré Gold Mine during the September 2023 Quarter.

PERSEUS MINING LIMITED

Level 2, 437 Roberts Road, Subiaco WA 6008 ABN: 27 106 808 986

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NEWS RELEASE | PERSEUS MINING ANNOUNCES OPEN PIT AND UNDERGROUND ORE RESERVE UPDATE AT YAOURÉ

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Table 1: Yaouré Gold Mine Measured & Indicated Mineral Resources[9,10,11]

MEASURED & INDICATED
MEASURED RESOURCES INDICATED RESOURCES
RESOURCES
DEPOSIT DEPOSIT TYPE
QUANTITY
GRADE
GOLD
QUANTITY
GRADE
GOLD
QUANTITY
GRADE
GOLD
Mt
g/t gold
’000 oz
Mt
g/t gold
’000 oz
Mt
g/t gold
’000 oz
CMA1,3,4, 6
Open Pit
-
-
-
16.7
1.32
710
16.7
1.32
710
Yaouré2,3,4, 6
Open Pit
-
-
-
19.2
1.27
784
19.2
1.27
784
Satellite deposits5,6
Open Pit
-
-
-
6.6
0.97
206
6.6
0.97
206
Sub Total
-
-
-
42.6
1.24
1,700
42.6
1.24
1,700
CMA8
Underground
-
-
-
7.3
4.17
976
7.3
4.17
976
Heap Leach3,7
Stockpile
-
-
-
0.4
0.61
8
0.4
0.61
8
Stockpiles
Stockpile
4.4
0.84
119
-
-
-
4.4
0.84
119
TOTAL
4.4
0.84
119
50.3
1.66
2,684
54.7
1.59
2,804

Table 2: Yaouré Gold Mine Inferred Mineral Resource[9,10 ]

INFERRED RESOURCES
DEPOSIT DEPOSIT TYPE QUANTITY
GRADE
GOLD
Mt
g/t gold
’000 oz
CMA1,3,4, 6
Open Pit
2.6
0.7
58
Yaouré2,3,4,6
Open Pit
3.0
1.3
124
Satellite deposits5,6
Open Pit
1.3
0.8
34
CMA8
Underground
4.4
3.4
485
TOTAL
11.3
1.9
701

Notes:

  1. Based on June 2022 Mineral Resource estimate.

  2. Based on June 2023 Mineral Resource estimate.

  3. Depleted for previous mining and to 30 June 2023 mining surface.

  4. 0.4 g/t gold cut-off applied to in situ open pit material.

  5. Based on Angovia 2 April 2021, Govisou June 2022, and CMA SW August 2022 Mineral Resource models.

  6. In situ open pit resources constrained to US$1,800/oz pit shells.

  7. Heap leach resources are stated at 0 g/t gold cut-off; only heap leach components with average grade above 0.4 g/t included.

  8. June 2023 Mineral Resource estimate, below Stage 3 pit and above 1.5 g/t block grade cut-off.

  9. Mineral Resources current as of 30 June 2023.

  10. Rounding of numbers to appropriate precision may result in summary inconsistencies.

  11. Mineral Resources are reported inclusive of Ore Reserves.

Table 3: Yaouré Gold Mine Ore Reserves[5,6 ]

PROVED PROBABLE PROVED + PROBABLE
DEPOSIT DEPOSIT TYPE QUANTITY
GRADE
GOLD
QUANTITY
GRADE
GOLD
QUANTITY
GRADE
GOLD
Mt
g/t gold
’000 oz
Mt
g/t gold
’000 oz
Mt
g/t gold
’000 oz
CMA1,2
Open Pit
-
-
-
11.9
1.81
692
11.9
1.81
692
Yaouré2,3
Open Pit
-
-
-
11.8
1.49
565
11.8
1.49
565
Satellite deposits2,3
Open Pit
-
-
-
4.1
1.03
137
4.1
1.03
137
Sub-Total -
-
-
27.8
1.56
1,394
27.8
1.56
1,394
CMA4
Underground
-
-
-
4.9
3.51
559
4.9
3.51
559
Stockpiles
Stockpile
4.4
0.84
119
-
-
-
4.4
0.84
119
TOTAL 4.4
0.84
119
32.8
1.85
1,953
37.2
1.73
2,072

Notes:

  1. Based on depletion to 30 June 2023 mining surfaces.

  2. Variable gold grade cut-offs for each material type, ranging from 0.35 g/t to 0.75 g/t.

  3. Pit designs are based on US$1,300/oz gold price for satellites and US$1,500/oz for CMA and Yaouré open pit.

  4. Based upon cut-off for development and stoping of 0.5 g/t and 2.5 g/t.

  5. Inferred Mineral Resource is considered as waste for optimisation purposes.

  6. Rounding of numbers to appropriate precision may have resulted in apparent inconsistencies.

Perseus’s Managing Director and CEO Jeff Quartermaine said:

“Since pouring first gold at Yaouré, this mine has repeatedly exceeded our expectations on almost every measure and made a very significant contribution to the success of our company. The discovery of extensions to the CMA orebody at depth and confirmation that these Mineral Resources can be economically developed is further evidence that not only

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is the Yaouré Gold Mine an outstandingly good operation, but that it will also continue to contribute benefits to all of our stakeholders, well beyond our initial estimates.

The results that have been announced today are associated with the first 400 metres down dip from the base of the CMA open pit. Three dimensional seismic surveys have confirmed that the CMA and associated structures continue at depth for a much greater distance underground and it will require further drilling to confirm that these structures are mineralised with economically mineable grades at depth. However, based on what we have seen to date, we are optimistic that once established, the underground operation at Yaouré will continue for many years into the future.

The Yaouré underground mine is Perseus’s first foray into underground mining, with all previous operations having been open cut operations. While this represents a new style of mining and a new challenge for us as a company, it is certainly not new to many of the technical staff that are currently employed by Perseus who are very keen to demonstrate their skills in an underground mining setting. This depth of talent within our existing ranks gives us every confidence that the Yaouré Underground operation, when it commences, will be every bit as successful as the open pit operation that has preceded it”.

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INTRODUCTION

Perseus is currently mining the CMA orebody at the Yaouré Gold Mine in Côte d’Ivoire using conventional open pit mining methods. The CMA orebody is a tabular zone of mineralisation 2-20 metres thick which generally grades at 3- 7 g/t gold and generally dips to the east at 20-35 degrees but can be shallower or steeper locally. Perseus reported its first open pit Mineral Resource and Ore Reserve in the News Release “Perseus Confirms Quality of Yaouré Gold Project” dated 3 November 2017 based on a Feasibility Study. The open pit Feasibility Study identified the potential for the CMA orebody to extend to depth. This was confirmed by a Concept Study entitled “Perseus Mining Completes Scoping Study for Potential Underground Mine at Yaouré” dated 5 November 2018, which evaluated the potential to mine the orebody using underground mining methods and produced a maiden Mineral Resource estimate for the CMA underground.

In 2020, a 3D seismic survey was completed over a large volume around the CMA pit, that provided encouragement that the CMA orebody continued further down dip from the area assessed in the 2018 Concept Study. Based on the findings, drilling programs were instigated in 2021 to convert the identified underground Inferred Mineral Resource to an Ore Reserve and to investigate the potential to extend the underground Inferred Mineral Resource further down dip. The two drilling programs were completed in the first half of 2022 which culminated with a Pre-Feasibility Study and maiden Ore Reserve for the CMA underground and continued extension of the Inferred Mineral Resource down-dip. The two drilling programs also had a small impact on the open pit Mineral Resource, mainly on the resource classification. Based on the results of the Pre-Feasibility Study, drilling has continued through 2022 and 2023 to support the CMA underground Feasibility Study and expand upon the existing CMA underground Mineral Resource and Ore Reserve.

After accounting for mine depletion, the CMA open pit Mineral Resources and Ore Reserves are materially unchanged from those previously stated. Please refer to release to ASX release “Perseus Updates Mineral Resource and Ore Reserve Estimates” dated 28 August 2019 for additional details.

OPEN PIT MINERAL RESOURCE

The combined 30 June 2023 Yaouré Gold Mine open pit Indicated Mineral Resources is 42.6 Mt at 1.24 g/t gold for 1.7 Moz and Inferred Mineral Resources of 6.9 Mt at 1.0 g/t gold for 216 koz.

The updated Yaouré open pit Mineral Resource estimate is 19.2 Mt at 1.27 g/t gold for 784 koz of Indicated Mineral Resources and 3.0 Mt at 1.3 g/t gold for 124 koz of Inferred Mineral Resources. The updated Yaouré open pit estimate includes an additional 22,084 metres in 130 drill holes targeting infill areas and high-grade lodes to delineate and increase the confidence of the Yaouré open pit Mineral Resource to support an updated Yaouré open pit Ore Reserve.

The updated CMA open pit Mineral Resource estimate is 16.7 Mt at 1.32 g/t gold for 710 koz of Indicated Mineral Resources and 2.6 Mt at 0.7 g/t gold for 58 koz of Inferred Mineral Resources. The CMA open pit Mineral Resource estimate for the Yaouré Gold Mine has been depleted to the 30 June 2023 surveyed mining surface.

After accounting for mine depletion and adjustments for the underground Mineral Resource within the US$1,800/oz pit shell, the CMA open pit Mineral Resource estimate remains materially unchanged from the previous CMA open pit estimate reported at 30 June 2019 and readers are referred to ASX release “Perseus Updates Mineral Resource and Ore Reserve Estimates” dated 28 August 2019 for additional details.

The Yaouré Satellite Deposits open pit Mineral Resources remain materially unchanged from the previous Yaouré Satellite Deposits open pit estimate reported at 30 June 2019 and readers are referred to ASX release “Perseus Updates Mineral Resource and Ore Reserve Estimates” dated 28 August 2019 for additional details.

The Yaouré, CMA and Satellite Deposits open pit Mineral Resources are reported at a 0.4 g/t gold cut-off grade within a US$1,800/oz pit shell.

The CMA, Yaouré and Satellite Deposits open pit Mineral Resource estimates are reported in accordance with the 2012 Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (the JORC Code). The classification categories of Measured, Indicated and Inferred under the JORC Code are equivalent to the CIM categories of the same names (CIM, 2014).

The 30 June 2023 estimated open pit Mineral Resources at Yaouré Gold Mine are summarised in Tables 4 and 5 below.

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Table 4: Yaouré Gold Mine Open Pit Measured & Indicated Mineral Resources[7,8]

MEASURED & INDICATED
MEASURED RESOURCES INDICATED RESOURCES
RESOURCES
DEPOSIT DEPOSIT TYPE
QUANTITY
GRADE
GOLD
QUANTITY
GRADE
GOLD
QUANTITY
GRADE
GOLD
Mt
g/t gold
’000 oz
Mt
g/t gold
‘000 oz
Mt
g/t gold
’000 oz
CMA1,3,5,6
Open Pit
-
-
-
16.7
1.32
710
16.7
1.32
710
Yaouré2,3,5,6
Open Pit
-
-
-
19.2
1.27
784
19.2
1.27
784
Satellite Deposits3,4,5,6
Open Pit
-
-
-
6.6
0.97
206
6.6
0.97
206
TOTAL -
-
-
42.6
1.24
1,700
42.6
1.24
1,700

Table 5: Yaouré Gold Mine Open Pit Inferred Mineral Resource[7 ]

INFERRED RESOURCES
DEPOSIT DEPOSIT TYPE QUANTITY
GRADE
GOLD
Mt
g/t gold
’000 oz
CMA1,3,5,6
Open Pit
2.6
0.7
58
Yaouré2,3,5,6
Open Pit
3.0
1.3
124
Satellite Deposits3,4,5,6
Open Pit
1.3
0.8
34
Total
6.9
1.0
216

Notes:

  1. Based on June 2022 Mineral Resource estimate.

  2. Based on June 2023 Mineral Resource estimate.

  3. Depleted for previous mining and to 30 June 2023 mining surface.

  4. Based on Angovia 2 April 2021, Govisou June 2022, and CMA SW August 2022 Mineral Resource models.

  5. 0.4 g/t gold cut-off applied to in situ open pit material.

  6. In situ open pit resources constrained to US$1,800/oz pit shells

  7. Rounding of numbers to appropriate precision may result in summary inconsistencies.

  8. Mineral Resources are reported inclusive of Ore Reserves

YAOURÉ OPEN PIT MINERAL RESOURCE MATERIAL INFORMATION SUMMARY

A Material Information Summary is provided for the Yaouré open pit Mineral Resource pursuant to ASX Listing Rules 5.8 and 5.9 and the Assessment and Reporting Criteria in accordance with JORC Code 2012 requirements. The Assessment and Reporting Criteria in accordance with JORC Code 2012 ( Table 1 ) is presented in Appendix 3 .

GEOLOGY AND GEOLOGICAL INTERPRETATION

The CMA and Yaouré gold deposits occur near the south-eastern flank of the Bouaflé greenstone belt in central Côte d’Ivoire. Mineralisation is hosted by Paleoproterozoic-aged metabasalts and granodiorites of the Birimian Supergroup. The rocks are metamorphosed to lower greenschist facies and only locally feature penetrative deformation fabrics. Timing of the gold mineralisation event at Yaouré is dated to have occurred circa 2,105+4 Ma associated with crustal shortening.

Gold mineralisation is predominantly associated with quartz-albite-carbonate veining in reverse fault (Y) structures, forming a series of interconnected lodes with the best developed structures typically dipping at 25 to 30 degrees to the east. Gold mineralisation is also associated with extensional sub-vertical strike-slip fault (S) structures commonly orientated in a general east-west strike, in addition to the reverse fault structures ( Appendix 1 – Figure 3 ). Gold is associated with disseminated pyrite within veins and altered wall-rocks. Arsenopyrite and molybdenite occur in trace quantities. No significant concentrations of other economic metals or deleterious elements are known to occur with the mineralisation.

The Yaouré open pit resource comprises thirty-two discretely modelled lodes with variable widths ranging from 1-3 metres up to 15-20 metres in approximate thicknesses. Fifty percent of the Indicated Resource ounces is hosted in eleven of the modelled lodes with the other fifty percent of the Indicated Resource ounces contained in the remaining lodes and background domains.

The Yaouré open pit Mineral Resource is currently defined to a maximum vertical depth of approximately 400 m from surface with Indicated Resources defined to an approximate depth of 250 metres and Inferred Resources defined to an approximate depth of 350 metres. The Mineral Resource extends over 1,500 metres in strike length.

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DRILLING TECHNIQUES

The Yaouré open pit Mineral Resource estimate is informed by RC and diamond core intercepts in holes drilled between 2007 and 2015 by Amara Mining plc, and holes drilled from 2017 onward by Perseus Mining ( Table 6 ). Fifty three percent of the drill hole metres that inform the Yaouré open pit resource estimate are comprised from diamond core samples.

Table 6: Yaouré Open Pit Resource Estimate Drilling Breakdown by Drill Type and Period

No. Holes No. Holes No. Holes Metres Metres Metres
Company
RC DD1 Total RC DD1 Total
Amara Mining
Perseus Mining
713
344
1,057
49,084.00
76,284.70
125,368.70
773
129
902
41,264.00
23,408.60
64,672.60
Total 1,486
473
1,959
90,348.00
99,963.30
190,041.30

1. DD figures include drill holes with RC pre-collars.

A total of 130 new drill holes for 22,084 metres are included in the updated 30 June 2023 Mineral Resource estimate compared with the previous Mineral Resource estimate. The 130 new drill holes targeted infill areas and high-grade lodes to delineate and increase the confidence of the Yaouré open pit Mineral Resource to support an updated Yaouré open pit Ore Reserve.

Drill hole collar locations were surveyed by qualified surveyors using total station or differential GPS equipment and reported in UTM Zone 30N with elevation converted to mine grid by adding 1,000 metres to the natural topographic datum height. Both RC and diamond core holes were down-hole surveyed at approximately 30 m intervals. Diamond core in fresh rock was routinely oriented.

DRILL COVERAGE

The Yaouré deposit is delineated by regular spaced drilling on an approximate 25 × 25 metre grid to a depth of between 200 and 250 metres below natural surface between 777,000 mN and 777,750 mN; and between 100 to 150 metres below natural surface between 776,500 mN and 777,000 mN. This drill spacing is considered sufficient to define Indicated Mineral Resources. Partial coverage is achieved at an approximate 50 × 50 metre spacing to approximately 300 and 350 metres below natural surface between 777,000 mN and 777,750 mN; and between 150 to 250 metres below natural surface between 776,500 mN and 777,000 mN. This drill spacing is considered sufficient to define Inferred Mineral Resources.

Holes have generally been drilled dipping at -55 to -75 degrees toward 270 degrees (UTM grid) azimuth, approximately orthogonal to the dip and strike of the reverse fault structures and drill intercept lengths closely approximate true widths of mineralisation for the reverse fault structures. Intercepts are typically oblique for the general east-west strike-slip fault structures with true widths approximately 65% of the intercept length. The 2023 drilling has been preferentially orientated where possible to intersect these structures at a more orthogonal angle.

Mineralisation remains open at depth.

SAMPLING

RC drill samples were collected over 1 metre intervals and split using multi-stage riffle splitters. Subsample weights were nominally 3 kilograms. For some Amara and most Perseus RC drilling, sample recovery was measured by weighing bulk recovered samples. For Amara and Perseus RC drill campaigns, samples were logged visually for recovery, moisture and contamination. The majority of Amara and Perseus RC samples were logged as dry and sample contamination in RC holes is not considered a significant risk to the reliability of the resource estimate.

Diamond core was sawn in half using a diamond blade saw, with one half sent for assaying and the other half stored in core trays for reference. Samples were normally taken over 1 metre intervals or shorter lengths to reflect sampling to geological contacts. For most Amara and Perseus core drilling, core recoveries were measured and considered reasonable with negligible core loss recorded.

SAMPLE ANALYTICAL METHODS

Samples were mainly prepared on site by Cluff, Amara and Perseus in a dedicated sample preparation facility. Sample preparation typically comprised drying, crushing to -2 millimetres and pulverising of a 1.5 kilogram

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subsample. Internal laboratory checks required at least 85% of the pulp passing -75 microns. The remainder of samples were prepared by commercial laboratories using nearly identical processes.

Assaying has been carried out by various commercial laboratories consistently using 50-gram Fire Assay (“FA”) technique with Atomic Absorption Spectroscopy (“AAS”) determination prior to 2023. Commencing in 2023 gold analysis has been conducted using the Chrysos PhotonAssay™ determination method at MSALABs in Yamoussoukro.

A consistent regime of quality assurance has been employed including submission of duplicate pulp samples, coarse blanks and certified reference materials.

ESTIMATION METHODOLOGY

Mineral Resources were estimated for gold using either Ordinary Kriging (OK) or Inverse Distance (ID) methods of 1 metre down-hole composited gold grades from RC and diamond drilling. The geological modelling and resource estimation was conducted using Leapfrog Geo™ software and the Edge™ module.

Discrete individual lodes (domains) were modelled using the interval selection tool and vein modelling function in Leapfrog Geo™. Domain intervals were selected based on geological characteristics of the mineralisation and a nominal cut-off grade of 0.2 g/t gold.

The estimation approach and estimate search strategy was chosen on an individual domain basis based on inputs criteria including the number of samples, drill hole spacing, lode (domain) orientation and variogram model analysis. Estimates were undertaken as hard boundaries into parent blocks with dimensions of 8.0 mE by 16.0 mE by 5.0mRL. The block size was selected based on drill hole spacing, the geometry of the mineralisation and the selective mining unit. Parent blocks were sub-blocked to 0.5 mE by 1.0 mN by 0.625 mRL to improve the volume definition of the domains.

Search ellipses were oriented to reflect the strike and dip directions of each of the lodes and where applicable dynamic anisotropy was applied. Top-cuts were applied based on an individual lode (domain) basis and ranged between 10 g/t to 40 g/t gold.

Bulk densities were applied to the block model by oxidisation type and lithology, with values of 1.80 t/m[3] for completely weathered material, 2.10 t/m[3] for transitional weathered material, 2.70 t/m[3] for sediments in fresh material, 2.85 t/m[3] for basalt in fresh material, 2.80 t/m[3] for intrusive porphyritic dykes and 2.75 t/m[3] for granodiorite.

Gold grade estimates were validated statistically by comparing mean composited grades to mean estimated grades, by gold grade trends in easting, northing and elevation Swath plots and by visual checks in Leapfrog.

RESOURCE CLASSIFICATION

Indicated Mineral Resources are confined to areas of approximately 25 metres by 25 metres drill coverage, with Inferred classified estimates in more broadly sampled mineralisation typically at a 50 metre by 50 metre drill coverage. Inferred Mineral Resources in places extend to a maximum of around 100 metres from drilling.

POTENTIAL FOR EVENTUAL ECONOMIC EXTRACTION

Mineral Resources comprise blocks with an estimated gold grade above 0.4 g/t Au, the average break-even cut-off grade that derives from cost and revenue parameters estimated in the Yaouré open pit Ore Reserve based on a gold price of US$1,800/oz.

There are no regulatory, environmental, or social impact considerations presently known that are likely to impact eventual economic extraction of the Mineral Resource.

The Mineral Resource estimate stated herein does not consider other modifying factors that might arise out of mine planning and design such as ore loss, mining dilution or other mineralised material that might be mined during general open pit production activities.

UNDERGROUND MINERAL RESOURCE

The CMA underground Mineral Resource estimate for the Yaouré Gold Mine has been updated to include all recent CMA resource drilling. The updated CMA underground Mineral Resource estimate is 7.3 Mt at 4.17 g/t gold for 976 koz of Indicated Mineral Resources and 4.4 Mt at 3.4 g/t gold for 485 koz of Inferred Mineral Resources.

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The updated CMA underground resource estimate includes an additional 44,711.9 metres in 100 drill holes targeting the CMA lode to delineate and increase the confidence of the CMA underground Mineral Resource to support the updated CMA underground Ore Reserve. The CMA underground is reported below the CMA Stage 3 pit design at a 1.5 g/t gold cut-off grade.

The underground Mineral Resource estimates are reported in accordance with the 2012 Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (the JORC Code). The classification categories of Measured, Indicated and Inferred under the JORC Code are equivalent to the CIM categories of the same names (CIM, 2014).

The 30 June 2023 estimated underground Mineral Resource at CMA are summarised in Tables 7 and 8 below.

Table 7: CMA Underground Measured & Indicated Mineral Resource[2,3]

MEASURED & INDICATED
MEASURED RESOURCES INDICATED RESOURCES RESOURCES
DEPOSIT DEPOSIT TYPE
QUANTITY
GRADE
GOLD
QUANTITY
GRADE
GOLD
QUANTITY
GRADE
GOLD
Mt
g/t gold
’000 oz
Mt
g/t gold
’000 oz
Mt
g/t gold
’000 oz
CMA1
Underground
-
-
-
7.3
4.17
976
7.3
4.17
976
TOTAL -
-
-
7.3
4.17
976
7.3
4.17
976

Table 8: CMA Underground Inferred Mineral Resource[2 ]

INFERRED RESOURCES
DEPOSIT DEPOSIT TYPE QUANTITY
GRADE
GOLD
Mt
g/t gold
‘000 oz
CMA1
Underground
4.4
3.4
485
Total
4.4
3.4
485

Notes:

  1. June 2023 Mineral Resource estimate, below Stage 3 pit and above 1.5 g/t block grade cut-off.

  2. Rounding of numbers to appropriate precision may result in summary inconsistencies.

  3. Mineral Resources are reported inclusive of Ore Reserves

CMA UNDERGROUND MINERAL RESOURCE MATERIAL INFORMATION SUMMARY

A Material Information Summary is provided for the CMA underground Mineral Resource pursuant to ASX Listing Rules 5.8 and 5.9 and the Assessment and Reporting Criteria in accordance with JORC Code 2012 requirements. The Assessment and Reporting Criteria in accordance with JORC Code 2012 ( Table 1 ) is presented in Appendix 3.

GEOLOGY AND GEOLOGICAL INTERPRETATION

The CMA and Yaouré gold deposits occur near the south-eastern flank of the Bouaflé greenstone belt in central Côte d’Ivoire. Mineralisation is hosted by Paleoproterozoic-aged metabasalts and granodiorites of the Birimian Supergroup. The rocks are metamorphosed to lower greenschist facies and only locally feature penetrative deformation fabrics. Timing of the gold mineralisation event at Yaouré is dated to have occurred circa 2,105+4 Ma associated with crustal shortening.

Gold mineralisation is predominantly associated with quartz-albite-carbonate veining in reverse fault (Y) structures, forming a series of interconnected lodes with the best developed structures typically dipping at 25 to 30 degrees to the east. Gold mineralisation is also associated with extensional sub-vertical strike-slip fault (S) structures commonly orientated in a general east-west strike, in addition to the reverse fault structures ( Appendix 1 – Figure 3 ). Gold is associated with disseminated pyrite within veins and altered wall-rocks. Arsenopyrite and molybdenite occur in trace quantities. No significant concentrations of other economic metals or deleterious elements are known to occur with the mineralisation.

The CMA Underground Mineral Resource comprises fifteen discrete lodes with typical thicknesses ranging from 2-3 metres up to 15-20 metres. Eighty-nine percent of the Indicated Mineral Resource tonnage and ninety-two percent of the Indicated Mineral Resource contained ounces is hosted in the principal CMA and bifurcated hangingwall lode (structure).

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CMA underground Mineral Resource extends from the designed base of the CMA open pit to a maximum vertical depth of approximately 185 metres for Indicated Resources and 350 metres for Inferred Resources. The corresponding down-dip extents beneath the pit design base are approximately 400 metres and 700 metres. The Mineral Resource extends over 1,400 metres in strike length and mineralisation remains open along the moderately plunging trend to the north ( Appendix 1 – Figure 5 ).

DRILLING TECHNIQUES

The CMA underground Mineral Resource estimate is informed by RC and diamond core intercepts in holes drilled between 2012 and 2015 by Amara Mining plc, and holes drilled from July 2017 onward by Perseus Mining ( Table 9 ). Approximately ninety-seven percent of the CMA intercepts (below the CMA pit design) that inform the underground Mineral Resource estimate are comprised from diamond core samples.

Table 9: CMA Underground Resource Estimate Breakdown for Principal CMA and Hangingwall Lode by Drill Type and Period

No. Holes No. Holes No. Holes Metres Metres Metres
Company
RC DD1 Total RC DD1 Total
Amara Mining
Perseus Mining
21
66
87
5,156
23,815.26
28,971.26
-
388
388
-
137,582.00
137,582.00
Total 21
454
475
5,156
161,397.26
166,553.26

1. DD figures include drill holes with RC pre-collars.

A total of 100 new drill holes for 44,711.9 metres are included in the updated 30 June 2023 Mineral Resource estimate compared with the previous Mineral Resource estimate. The 100 new drill holes targeted infill areas and down-dip extension of the high-grade CMA lode to delineate and increase the confidence of the CMA underground Mineral Resource to support an updated CMA underground Ore Reserve.

Drill hole collar locations were surveyed by qualified surveyors using total station or differential GPS equipment and reported in UTM Zone 30N with elevation converted to mine grid by adding 1,000 metres to the natural topographic datum height. Both RC and diamond core holes were down-hole surveyed at approximately 30 m intervals. Diamond core in fresh rock was routinely oriented.

DRILL COVERAGE

The CMA underground lodes are delineated by regular drilling at approximately 25 to 30 metres down-dip spaced holes to between 75 and 100 metres and approximately 50 to 60 metres down-dip spacing between 100 to 185 metres below the base of the CMA open pit. The drill spacing is considered sufficient to define Indicated Mineral Resources. Drilling coverage is at greater than 50 metres up to 100 metres spacing to approximately 350 metres below the base of the CMA open pit which is considered sufficient to define Inferred Mineral Resources.

Holes have generally been drilled dipping at -55 to -75 degrees toward 270 degrees (UTM grid) azimuth, approximately orthogonal to the dip and strike of the principal CMA lode, with drill intercept lengths closely approximate to true widths of mineralisation. In the CMA northwest lode, drill holes prior to 2023 are mostly oblique to the lode and the effective along-strike drill spacing is 40 to 50 m and mineralisation true width is approximately 65% of intercept length.

Mineralisation remains open at depth.

SAMPLING

RC drill samples were collected at drill sites over 1 metre intervals and split using multi-stage riffle splitters. Subsample weights were nominally 3 kilograms. For some Amara and most Perseus RC drilling, sample recovery was measured by weighing bulk recovered samples. For Amara and Perseus RC drill campaigns, samples were logged visually for recovery, moisture and contamination. The majority of Amara and Perseus RC samples were logged as dry and sample contamination in RC holes is not considered a significant risk to the reliability of the resource estimate.

Diamond core was sawn in half using a diamond blade saw, with one half sent for assaying and the other half stored in core trays for reference. Samples were normally taken over 1 metre intervals or shorter lengths to reflect sampling to geological contacts. For most Amara and Perseus core drilling, core recoveries were measured and averaged in excess of 98% in fresh rock.

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SAMPLE ANALYTICAL METHODS

Samples were mainly prepared on site by Cluff, Amara and Perseus in a dedicated sample preparation facility. Sample preparation typically comprised drying, crushing to -2 millimetres and pulverising of a 1.5-kilogram subsample. Internal laboratory checks required at least 85% of the pulp passing -75 microns. The remainder of samples were prepared by commercial laboratories using nearly identical schemes.

Assaying has been carried out by various commercial laboratories consistently using 50-gram Fire Assay (“FA”) technique with Atomic Absorption Spectroscopy (“AAS”) determination prior to 2023. Since February 2023, gold analyses have preferentially been attained via the Chrysos PhotonAssay™ determination method at MSALABs in Yamoussoukro.

A consistent regime of quality assurance has been employed including submission of duplicate pulp samples, coarse blanks and certified reference materials.

ESTIMATION METHODOLOGY

Mineral Resources were estimated for gold using either Ordinary Kriging (OK) or Inverse Distance (ID) methods of 1 metre down-hole composited gold grades from RC and diamond drilling. The geological modelling and resource estimation was conducted using Leapfrog Geo™ software and the Edge™ module.

Discrete individual lodes (domains) were modelled using the interval selection tool and vein modelling function in Leapfrog Geo™. Domain intervals were selected based on geological characteristics of the CMA mineralisation and a nominal cut-off grade of 0.5 g/t gold.

The estimation approach and estimate search strategy was chosen on an individual domain basis based on inputs criteria including the number of samples, drill hole spacing, lode (domain) orientation and variogram model analysis. Estimates were undertaken as hard boundaries into parent blocks with dimensions of 10.0 mE by 12.5 mE by 5.0 mRL. The block size was selected based on drill hole spacing, the geometry of the mineralisation and the selective mining unit. Parent blocks were sub-blocked to 0.625 mE by 3.125 mN by 0.3125 mRL to improve the volume definition of the domains.

Search ellipses were oriented to reflect the strike and dip directions of each of the lodes and where applicable dynamic anisotropy was applied. Top-cuts were applied based on an individual lode (domain) basis and ranged between 10 g/t to 35 g/t gold.

Bulk densities were applied to the block model by oxidisation type and lithology, with values of 1.80 t/m[3] for completely weathered material, 2.10 t/m[3] for transitional weathered material, 2.70 t/m[3] for sediments in fresh material, 2.85 t/m[3] for basalt in fresh material, 2.80 t/m[3] for intrusive porphyritic dykes and 2.75 t/m[3] for granodiorite.

Gold grade estimates were validated statistically by comparing mean composited grades to mean estimated grades, by gold grade trends in easting, northing and elevation Swath plots and by visual checks in Leapfrog.

RESOURCE CLASSIFICATION

Indicated Mineral Resources are confined to areas of approximately 25 up to 50 metres drill hole spacing coverage, with Inferred classified estimates in more broadly sampled mineralisation between approximately 50 to 100 metres drill hole spacing coverage. Inferred Mineral Resources generally extend to a maximum of around 50 metres from drilling.

Other general conditions taken into consideration in the classification are as follows:

  • Kriging Efficiency (KE)

  • Continuity of grades between drill holes

  • Confidence in the geological interpretation of mineralisation boundaries.

POTENTIAL FOR EVENTUAL ECONOMIC EXTRACTION

Mineral Resources comprise blocks with an estimated gold grade above 1.5 g/t gold, the average break-even cut-off grade that derives from cost and revenue parameters estimated in the CMA underground feasibility study and based on a gold price of US$1,800/oz.

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There are no regulatory, environmental, or social impact considerations presently known that are likely to impact eventual economic extraction of the Mineral Resource.

The Mineral Resource estimate stated herein does not consider other modifying factors that might arise out of mine planning and design such as ore loss, mining dilution or other mineralised material that might be mined in order to access stoping areas during general underground production activities.

OPEN PIT ORE RESERVE

The Ore Reserve for CMA open pit is summarised below in Table 10 and is based on the CMA Mineral Resources as at 30 June 2023. Apart from depletion, the CMA open pit and Yaouré satellite open pit Ore Reserve estimates remain materially unchanged from the estimate reported at 30 June 2019 and readers are referred to ASX release “Perseus Updates Mineral Resource and Ore Reserve Estimates” dated 28 August 2019 for additional details. During FY23, Perseus has increased its Ore Reserve gold price to $1,500/oz from $1,300/oz, however for the CMA open pit, there is no practical additional cutback at $1,500/oz relative to the pre-existing Ore Reserve design based on a $1,300/oz pit shell and the design therefore remains unchanged.

The Ore Reserve for Yaouré open pit is reported within a pit design based on an optimised pit shell and cut-off grades at a $1,500/oz gold price. An increase of 6.9 Mt at 1.82 g/t for 403 koz of material has been added to the June 2022 Yaouré open pit Ore Reserve, for a total of 11.8 Mt at 1.49 g/t for 565 koz of probable Ore Reserves for Yaouré open pit. The combined open pit Ore Reserves for the Yaouré Gold Mine is now 27.8 Mt at 1.56 g/t for 1.4 Moz.

Ore Reserves are reported in accordance with the JORC Code and are reported by category, deposit and type, above variable cut-off grades. The classification categories of Proved and Probable under the JORC Code are equivalent to the CIM Proven Mineral Reserve and Probable Mineral Reserve categories respectively (CIM, 2010). Appendix 3 provides the JORC Table 1 criteria for the Yaouré open pit Ore Reserves.

Table 10: Yaouré Open Pit Proved and Probable Ore Reserves as at 30 June 2023[ 4,5]

PROVED PROVED PROBABLE PROBABLE PROBABLE PROVED + PROBABLE PROVED + PROBABLE PROVED + PROBABLE
DEPOSIT
DEPOSIT Quantity Grade Gold Quantity Grade Gold Quantity Grade Gold
TYPE
Mt g/t gold ’000 oz Mt g/t gold ’000 oz Mt g/t gold ’000 oz
CMA1,2
Open Pit
- -
-
11.9
1.81
692
11.9
1.81
692
Yaouré2,3
Open Pit
11.8
1.49
565
11.8
1.49
565
Near-Mine
Satellite2,3
Open Pit
4.1
1.03
137
4.1
1.03
137
Total - -
-
27.8
1.56
1,394
27.8
1.56
1,394

Notes:

  1. Based on depletion to 30 June 2023 mining surfaces.

  2. Variable gold grade cut-offs for each material type, ranging from 0.35 g/t to 0.75 g/t.

  3. Pit designs are based on US$1,300/oz gold price for satellites and US$1,500/oz for CMA and Yaouré open pit.

  4. Inferred Mineral Resource is considered as waste for optimisation purposes.

  5. Rounding of numbers to appropriate precision may have resulted in apparent inconsistencies.

CUT-OFF GRADES

Cut-off grades for the Yaouré open pit Ore Reserve range from 0.45 g/t to 0.75 g/t depending upon material type. Cut-off calculation revenues are estimated at a gold price of $1,500/oz. Cut-off grades are based on calculated grades and rounded up to the nearest 0.05 g/t.

Table 11: Yaouré Open Pit Ore Reserve Cut-off Grades

MATERIAL TYPE OXIDE TRANSITION YAOURÉ BASALT YAOURÉ GRANODIORITE
Cut-off (g/t)
0.45
0.50
0.75
0.60

The cut-off grade for the Yaouré basalt fresh material type is significantly higher than for the fresh granodiorite due to the much lower processing rate for this material (2.5 Mt/y for basalt vs 3.2 Mt/y for the granodiorite).

Un-escalated average costs used in optimising pit designs are as shown in Table 12 below. A rate of 10% (real) has been assumed to discount cash flows.

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Table 12: Average operating costs

1.
MINING (OPEN PIT)
2.
PROCESSING
3.
G&A
4.
SELLING
5.
ROYALTIES1
US$3.21/t mined
US$17.28/t milled
US$9.30/t milled
US$3.05/oz sold
4.5%

Notes: 1. Includes 0.5% contribution to Community Development Fund.

MINING ASSUMPTIONS

  • The chosen method for the Open Pit Reserves is conventional open pit mining utilising hydraulic excavators and trucks, mining bench heights of 10 metres with 2.5 metre flitches to minimise ore loss and waste rock dilution.

  • The Yaouré open pit Ore Reserve is based upon a reblocked version of the Yaouré open pit Mineral Resource model. The Ore Reserve model has been reblocked to 4.0 m × 4.0 m × 2.5 m block size, which introduces a dilution of 8% additional ore tonnes for 11% reduction in grade and mining recovery of 96% of ounces relative to the sub-blocked Mineral Resource model.

  • The economic pit shell was defined using Whittle pit optimisation software (“Whittle”) with inputs such as geotechnical parameters, metallurgical recovery and mining costs.

  • The pit optimisation was run with revenue generated only by Measured and Indicated Mineral Resources. No value was allocated to Inferred Mineral Resources.

  • Whittle input parameters are based on Perseus site operating experience in similar deposits at Yaouré and supporting technical studies undertaken as part of the Yaouré Feasibility study.

  • The pit slope designs are based on a geotechnical study by Pitt & Sherry Consultants. Inter-ramp slope angles are 30 to 40 degrees inclusive of berms spaced at 10 metres vertically and berm widths of 4.5 to 7 metres.

  • Pit ramps have been designed for a 100-tonne payload truck fleet and are set at 24 metres (dual lane) to 16 metres (single lane). Minimum mining width is 40 metres for the 100-tonne class truck fleet.

  • Vertical mining advance has been capped based on Perseus’s operating experience.

  • No environmental issues are known to exist which will prevent open pit mining and ore processing to continue to operate.

  • Perseus has ongoing studies to update the Yaouré waste dump and tailings dam designs, to include the new Yaouré open pit Ore Reserves, however we are not aware of any reason why such additional capacity will not be sufficiently available on site. Capacity on site is permitted for the required volumes of waste and tailings.

PROCESSING PARAMETERS

  • The process metallurgical recovery for gold is fixed by material type in each deposit. Gold recovery rates range from 92.6% for the fresh Yaouré basalt ore to 93.8% for the Yaouré granodiorite ore. Recovery is shown in Table 13.

  • No deleterious material has been identified.

  • Average annual processing throughput rate of ore is 3.9 Mt/y for oxide and transitional ore and 2.5 Mt/y and 3.2 Mt/y for Yaouré basalt and Yaouré granodiorite respectively. The processing circuit comprises crushing, grinding, gravity and cyanide leaching to extract gold.

Table 13: Metallurgical Recoveries by Material Type and Pit

METALLURGICAL RECOVERIES BY ORE TYPE (%)
DEPOSIT
Oxide
Transition
Fresh Basalt
Fresh Granodiorite
Yaouré
93.0
93.3
92.6
93.8

CRITERIA FOR ORE RESERVE CLASSIFICATION

Ore Reserves have been classified based on the underlying Mineral Resource classifications and a Feasibility level study for the Yaouré Gold Mine. Mineral Resources were classified as Indicated and Inferred. The Ore Reserves, based only on the Indicated Resources, have been classified as Probable Ore Reserves, respectively.

The Ore Reserve is classified as Probable in accordance with the JORC Code, corresponding to the Mineral Resource classification of Indicated and taking into account other modifying factors where relevant.

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The Ore Reserve classification is considered appropriate given the nature of the deposit, metallurgical testwork, drilling density, structural complexity and mining and processing history at Yaouré Gold Mine. Therefore, it was deemed appropriate to use Indicated Mineral Resources as a basis for Probable Ore Reserves.

No Inferred Mineral Resources are included in the Ore Reserve estimate.

UNDERGROUND ORE RESERVE

The CMA underground Ore Reserve is supported by Feasibility-level studies which establish the technical and economic viability of the CMA underground project. Studies include metallurgical, geotechnical and hydrogeological testwork, as well as individual analysis and investigations in relation to mining ventilation, capital development options (portal locations), open pit and underground geotechnical assessment and mining, processing and infrastructure capital and operating cost estimates. Studies have been undertaken by Perseus technical staff and expert consultants.

The FY23 CMA underground Ore Reserve is shown in Table 14 below.

Table 14: CMA Underground Probable Ore Reserves[1,2,3]

PROVED PROBABLE PROVED + PROBABLE
DEPOSIT DEPOSIT TYPE QUANTITY
GRADE
GOLD
QUANTITY
GRADE
GOLD
QUANTITY
GRADE
GOLD
Mt
g/t gold
’000 oz
Mt
g/t gold
’000 oz
Mt
g/t gold
’000 oz
CMA
Underground
-
-
-
4.9
3.51
559
4.9
3.51
559
TOTAL -
-
-
4.9
3.51
559
4.9
3.51
559

Notes:

  1. Based upon cut-off for development and stoping of 0.5 g/t and 2.5 g/t respectively.

  2. Inferred Mineral Resource is considered as waste for optimisation purposes.

  3. Rounding of numbers to appropriate precision may have resulted in apparent inconsistencies.

CUT-OFF GRADES

Cut-off grades for the CMA underground Ore Reserve range from 0.5 g/t for development ore to 2.5 g/t for production (stoping) ore. Cut-off calculation revenues are estimated at a gold price of $1,500/oz, and are inclusive of royalties, mining, processing and governance and administration (G&A) costs where relevant.

MINING ASSUMPTIONS

The CMA underground will be mined by a combination of flat longhole open stoping and conventional longhole open stoping mining methods. These methods have been selected as the most cost effective and productive mining methods for the flat-dipping CMA orebody. The mining method is dependent upon the dip of the orebody which ranges from 5 degrees to 20 degrees for the majority of flat longhole stoping, and from 50 degrees up to 62 degrees for conventional longhole stoping. The mine design encompasses significant variability in plunge and dip across the deposit, for which a flexible mining method is required. Flat longhole stoping accounts for the majority of ore tonnes (98%), while conventional stoping applies only to the CMA northwest area of the mine (2% of ore tonnes).

Mining equipment will be mechanised, and equipment is planned to include electric-hydraulic drills for development and production, and rubber tyred loaders and trucks for load and haul activities. Production loading will incorporate tele-remote loading for non-entry mining stopes.

The CMA underground is based on a “no backfill” case for mining the CMA deposit. At this stage, a high recovery of the CMA orebody using pillars means that backfill is not part of the mine plan. If Ore Reserves increase and the mine gets deeper, there may be a case in the future for implementation of a reticulated backfill system such as paste fill.

Mining extraction ratios for CMA underground Ore Reserves are dependent upon the dimensions and spacing of pillars throughout the orebody. The CMA Ore Reserve assumes 40 metre open stopes (along strike) and pillars of 10 metres by 10 metres, which combines with strategically placed vent pillars to provide an overall 81% extraction ratio (mining recovery). Forty metre stope strike extents are considered a practical distance over which to successfully operate remote loaders to recover ore from flat longhole open stopes.

Planned dilution (within mining stopes) for the CMA underground flat longhole open stoping is 34% (on tonnes basis) based upon a production (stoping) cut-off of 2.5 g/t. Thirty four percent is relatively high dilution for longhole stoping, however this is not unexpected due to the flat footwall of the stopes (slope of 1:6), which is designed to accommodate trafficability by remote loaders to ensure planned stoping (mining) recoveries are achievable. A minimum mining

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width of 4.0 m is assumed for flat stoping types and 3.0 m for longhole (conventional) stoping to allow access to stopes by large, mechanised mining equipment.

Unplanned dilution (additional to mining shapes) is 5% for development and 10% for production.

Mining recoveries applied to flat and conventional longhole stoping across the whole of the mine (including the crown pillar) are in addition to mining recovery due to pillars of 81% stated above.

In addition to ore loss (mining recovery) due to pillars, a mining recovery factor of 90% is applied to flat longhole stopes, except for within the crown pillar where a lower recovery factor of 50% is assumed.

Mining recovery for conventional longhole open stopes in the CMA northwest is 70%, due to the steeper minimum footwall angle of 40 degrees which will neither rill nor be trafficable by loaders. It is envisaged that for this small proportion of the orebody (2% of tonnes), hydraulic or other assistance will be required to slough ore from the footwall.

MINE DESIGN

Development design for CMA underground consists of two pairs of portals, and an extra single intake portal, making 5 development breakthroughs into the CMA open pit. The south and north portal pairs (one each of intake and exhaust, north and south) are to be established concurrently and both pairs are located on the west wall of the CMA open pit. Twin intake and exhaust portals are required to maintain ventilation quantities (total of 540 m[3] /s) once full production rates of 720 kt/y are reached. The exhaust portals also function as emergency egress. Due a relatively deep weathering profile at Yaouré and the availability of the CMA open pit void, lateral development in fresh rock material is more cost effective than vertical shafts. CMA underground Ore Reserve design is shown in Appendix 1 – Figures 5, 7 and 8 .

Development ore drives are nominally 4.7 metres wide by 5.0 metres high, however both drive height and width can increase to accommodate the dimensions of the orebody.

Ore development drives can be very steep in places and are designed to follow the orebody on a pre-defined bearing, with variations in gradient taken under geological control to maintain the drive position within the orebody. Maximum development gradients are 1 m vertical for every 5.5 m or horizontal advance (1:5.5). Development rates have been reduced to as low as 40 m per month per heading to accommodate for slower advance in areas of steep development. Further engineering studies planned for FY24 to incorporate new ore will also reduce ore drive development gradients wherever practicable.

Production design for flat longhole open stopes include a footwall design slope of 1:6 to allow trafficability for remote loaders. Flat longhole stopes are spaced 10 metres horizontally apart (wall to wall), which limits the length of production drillholes to a practical and achievable length of less than 16 metres, depending upon the forward angle of the holes and the dip of the orebody. The slightly steeper dipping conventional longhole stopes (in the CMA northwest) are nominally spaced 20 metres vertically apart and have a minimum footwall angle of 40 degrees.

Stope optimisations were run on only Indicated Mineral Resources. Inferred Mineral Resources were considered as waste for the purposes of optimisation. There are no Measured Mineral Resources for the CMA underground.

MINE SCHEDULE

A mine schedule for the CMA underground Ore Reserve has been developed. The maximum production rate for the CMA underground is 720 kt/y (60 kt per month of ore). Based on current assumptions of development and production rates, the limiting constraints are the number of available headings. The mining sequence is a combination of topdown and bottom-up mining, providing flexibility for production to be maintained depending upon the available number of development headings and stoping areas.

METALLURGICAL ASSUMPTIONS

The Yaouré processing plant uses crushing, grinding, gravity and cyanide leaching to extract gold. The plant has a nominal nameplate capacity of 3.3 Mt/y on fresh ore grinding to grind size P80 of 75 µm. The technology used in the processing plant is well proven, and the plant has been operating successfully since December 2020.

Test work and analysis for the CMA underground has resulted in the generation of a metallurgical processing recovery formula which represents the spatial distribution of processing recovery across the orebody.

The processing recovery formula has been incorporated into the mine schedule to apply recoveries based on the spatial location of the relevant mining shape. The range of processing recoveries estimated by the recovery formula for the CMA underground Ore Reserve ranges from 80.5% to 92.1% on a monthly basis. The optimum recovery is

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achieved at a grind size P80 of 53 µm, slightly finer than the grind size P80 of 75 µm for the open pit ore. Cost vs benefit studies have been undertaken to determine whether a batch treatment or blending option will be most beneficial for the CMA underground ore, with batch processing currently the preferred option. The underground ore will therefore be batch treated utilising more of the available installed ball mill power to achieve a finer grind.

The average metallurgical processing recovery for the CMA underground Ore Reserves is 87.2%.

INFRASTRUCTURE

Power, water, workshops, offices, storage of reagents and laboratory are established at the processing plant to support open pit and processing activities for the existing Yaouré Gold Mine.

A camp is established to accommodate non-local employees, and this will be expanded to accommodate the underground workforce.

Additional contractor and client offices, changerooms and workshop facilities will be established for the CMA underground. Costs have been accounted for in the CMA underground development capital estimate.

COSTS

Costs for CMA underground Ore Reserves include contractor pricing estimates, capital costs generated by Perseus based upon experience of project construction and operating in West Africa, and supplier cost quotes to feasibility level. Where possible, known costs from the Yaouré Gold Mine were included in the CMA underground study, including for local labour, site-based costs and consumables common to the underground and the existing open pit operation (such as diesel). All costs are calculated on a pre-tax basis.

Overall mining costs for the CMA underground range from US$50-60/t ore, excluding sustaining capital of US$11-13M and Project development capital estimated at US$125M to US$135M. Project development capital is inclusive of capitalised pre-production operating costs up until commercial production rates of 50 kt per month are achieved and includes LOM capital development.

Processing and G&A costs are estimated to be US$14.76/t ore and US$7.26/t ore respectively, depending upon the ore blend and therefore the processing throughput. All costs, metal prices and revenues are in United States Dollars (USD).

All costs are to a feasibility level of accuracy.

ECONOMIC ASSUMPTIONS

A gold price of US$1,500/oz is used for mine planning and generating cut-off grades for stope optimisation.

Economic modelling by Perseus is at US$1,500/oz.

Bullion and refining cost of US$3.05/oz is assumed, as is a government royalty of 4.5% of the metal price (includes 0.5% contribution to Community Development Fund).

All-in Site Cost (AISC) for the CMA UG Ore Reserves are in the range US$1,000oz to US$1,100/oz.

ENVIRONMENT AND PERMITTING

There are currently no large-scale, mechanised underground mines in Côte d’Ivoire, and as such there is no specific underground mining regulation. Recent experience of other mining companies in neighbouring West African jurisdictions is that this does not preclude the development of underground projects.

Perseus will continue to engage the Ivorian government in relation to permitting and future underground development at Yaouré, including the CMA underground.

CRITERIA FOR ORE RESERVE CLASSIFICATION

Ore Reserves have been classified based on the underlying Mineral Resources classifications. Ore Reserves, based on Indicated Resources, have been classified as Probable Ore Reserves.

The Ore Reserve classification is considered appropriate given the Feasibility level study which supports the Ore Reserve, based upon expert test work and analysis at the appropriate level of confidence.

Stope optimisations were run on only Indicated Mineral Resources. Inferred Mineral Resources were considered as waste for the purposes of optimisation.

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In addition to the conversion of Indicated Mineral Resources, there are some development Ore Reserves which are above the COG of 0.5 g/t, but below the Mineral Resource cut-off of 1.5 g/t. These ounces are not therefore a subset of the Mineral Resource. This material accounts for 5.5 kt or 200 ounces (<0.04% gold ounces) which is included within the Ore Reserve. This incidental mineralisation is not considered material to the CMA underground Ore Reserve.

STOCKPILES

Mineral Resources and Ore Reserves contained in stockpiles are based on volume estimates from ground survey data, loose bulk densities are derived over time by reconciliation of volumes mined (at in situ densities) compared to stockpile movements and calculated volumes, with estimates of stockpile grades based on predicted grades of mined material transferred onto stockpiles compared to material depleted by processing.

Closing Yaouré stockpiles at 30 June 2023 were estimated as shown in Table 15 .

Table 15: Yaouré Closing Stockpiles[1 ]

MATERIAL QUANTITY
kt
GRADE
g/t
gold
GOLD
’000 oz
Low grade 4,256 0.76 105
Medium grade 19 1.17 1
High grade 83 2.87 8
Crushed ore stockpile 82 2.39 6
Total 4,441 0.84 119

Notes:

1 Stockpile tonnage and grade estimates are considered sufficiently accurate to support their classification as Measured Mineral Resources and Proved Ore Reserves.

It is assumed that all Ore Reserve material is mined and fed to the processing plant during Yaouré mine life based on the material blending schedule and all the material is rehandled on the ROM stockpile.

CMA UNDERGROUND AND YAOURÉ OPEN PIT RESOURCE DEFINITION DRILLING

Perseus last announced results of drilling completed at CMA on 18 January 2023 with ASX Release “Perseus Drilling Demonstrates Potential for Additional Gold Resources at Yaouré Gold Mine”. Perseus has now completed the infill and extensional drilling targeting the CMA and Yaouré lodes; the results from which are included in the 2023 Yaouré open pit, CMA open pit and underground Mineral Resource update detailed in this release.

Infill and extensional drilling completed since the ASX release in January of the defined CMA underground and Yaouré open pit Mineral Resource confirms further high-grade gold mineralisation, with recent results including:

CMA underground resource drilling

  • YRC2181D: 13.2 m @ 9.4 g/t gold from 332.0 m

  • YRC2186D: 12.0 m @ 6.7 g/t gold from 363.0 m; including 3.0 m @ 13.45 g/t gold from 365.0 m

  • YRC2195D: 13.0 m @ 5.2 g/t gold from 20.0 m; including 9.0 m @ 7.03 g/t gold from 20.0 m

  • YRC2187D: 15.2 m @ 4.5 g/t gold from 362.0 m; including 3.0 m @ 7.67 g/t gold from 367.0 m and 2.0 m @ 12.85 g/t gold from 373.0 m

  • YRC2220D: 12.0 m @ 5.5 g/t gold from 414.0 m; including 2.0 m @ 21.0 g/t gold from 424.0 m.

Yaouré open pit resource drilling

  • YRC2309D: 4.0 m @ 76.8 g/t gold from 36.0 m

  • YRC2249D: 5.0 m @ 45.9 g/t gold from 151.0 m; including 3.0 m @ 75.55 g/t gold from 151.0 m

  • YRC2248D: 28.3 m @ 6.6 g/t gold from 20.0 m; including 8.0 m @ 12.20 g/t gold from 24.0 m and 3.0 m @ 18.76 g/t gold from 40.0 m

  • YRC2226D: 5.0 m @ 35.2 g/t gold from 151.0 m

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  • YRC2272D: 58.6 m @ 2.31 g/t gold from 146.0 m; including 5.0 m @ 8.45 g/t gold from 188.0 m

  • YRC2292D: 10.5 m @ 11.8 g/t gold from 67.7 m; including 3.3 m @ 34.54 g/t gold from 74.0 m

  • YRC2300: 10.0 m @ 12.4 g/t gold from 52.0 m; including 2.0 m @ 59.02 g/t gold from 55.0 m

  • YRC2329: 15.0 m @ 8.2 g/t gold from 28.0 m; including 4.0 m @ 28.90 g/t gold from 37.0 m

  • YRC2286D: 5.0 m @ 22.7 g/t gold from 125.0 m; including 3.0 m @ 36.51 g/t gold from 126.0 m

  • YRC2250D: 4.9 m @ 22.4 g/t gold from 92.2 m

  • YRC2289D: 12.1 m @ 6.5 g/t gold from 54.1 m; including 3.6 m @ 18.81 g/t gold from 59.0 m

  • YRC2312D: 3.0 m @ 23.2 g/t gold from 158.0 m

  • YRC2328: 4.0 m @ 16.5 g/t gold from 9.0 m.

Selected intercepts from the Yaouré open pit and CMA underground drilling are shown in Appendix 1 - Figures 4 and 6 . A complete summary of significant drilling results for the Yaouré open pit and CMA underground are included in Appendix 2 – Table 2.1 .

NEXT STEPS

Perseus will prepare an updated LOM for the Yaouré Gold Mine during the September Quarter 2023, including the combined results of the expanded Yaouré open pit and the CMA underground feasibility study.

Perseus is undertaking both resource definition drilling and down-plunge exploration drilling for the CMA underground project, in order to further convert Inferred Mineral Resources to Indicated Mineral Resources, and to extend the Inferred Mineral Resource further down-plunge, and to the north of the current CMA Ore Reserve.

For Yaouré open pit, further extensional drilling and extended geotechnical and metallurgical test work regimes at the is budgeted for the FY24 financial year. Drilling and test work programs will be followed by assessment of potential for further expansion of Yaouré Mineral Resources and Ore Reserves by the end of FY24.

This announcement has been approved for release by Jeff Quartermaine, Managing Director and CEO.

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Competent Person Statement:

The information in this report that relate to Mineral Resources for CMA open pit, CMA underground, Yaouré open pit and exploration drilling results at the Yaouré Project is based on, and fairly represents, information and supporting documentation prepared by Hans Andersen, a Competent Person, employee of Perseus and Member of the Australian Institute of Geoscientists. Mr Andersen, has sufficient experience, which is relevant to the style of mineralisation and type of deposit under consideration and to the activity being undertaken, to qualify as a Competent Person as defined in the 2012 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’) and to qualify as a “Qualified Person” under National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”). Hans Andersen consents to the inclusion in the report of the matters based on his information in the form and context in which it appears .

The information in this report that relate to Mineral Resources for Yaouré’s open pit Satellite Deposits, Heap Leach and Stockpiles at the Yaouré Project is based on, and fairly represents, information and supporting documentation prepared by Matt Bampton, a Competent Person, employee of Cube Consulting Pty Ltd and Member of the Australian Institute of Geoscientists. Mr Bampton, has sufficient experience, which is relevant to the style of mineralisation and type of deposit under consideration and to the activity being undertaken, to qualify as a Competent Person as defined in the 2012 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’) and to qualify as a “Qualified Person” under National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”). Matt Bampton consents to the inclusion in the report of the matters based on his information in the form and context in which it appears .

The information in this report that relates to Ore Reserves for CMA open pit, CMA underground and Yaouré open pit is based on information compiled by Mr Adrian Ralph, a Competent Person who is a Fellow of The Australasian Institute of Mining and Metallurgy. Mr Ralph is a full-time employee of Perseus Mining. Mr Ralph has sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration and to the activities which he is undertaking to qualify as a Competent Person as defined in the 2012 Edition of the “Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves” and a Qualified Person as defined in NI43-101. Mr Ralph consents to the inclusion in this report of the matters based on his information in the form and context in which it appears.

The information in this report that relates to Ore Reserves for Yaouré open pit Satellite Deposits, Heap Leach and Stockpiles at the Yaouré Project is based on information compiled by Mr Quinton de Klerk, a Competent Person who is a Fellow of The Australasian Institute of Mining and Metallurgy. Mr de Klerk is a full-time employee of Cube Consulting Pty Ltd. Mr de Klerk has sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration and to the activities which he is undertaking to qualify as a Competent Person as defined in the 2012 Edition of the “Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves” and a Qualified Person as defined in NI43-101. Mr de Klerk consents to the inclusion in this report of the matters based on his information in the form and context in which it appears.

The Company confirms that material assumptions underpinning the estimates of Ore Reserves described in “Technical Report — Yaouré Gold Project, Côte d’Ivoire” dated 18 December 2017 continue to apply.

Caution Regarding Forward Looking Information:

This report contains forward-looking information which is based on the assumptions, estimates, analysis and opinions of management made in light of its experience and its perception of trends, current conditions and expected developments, as well as other factors that management of the Company believes to be relevant and reasonable in the circumstances at the date that such statements are made, but which may prove to be incorrect. Assumptions have been made by the Company regarding, among other things: the price of gold, continuing commercial production at the Yaouré Gold Mine, the Edikan Gold Mine and the Sissingué Gold Mine without any major disruption, the receipt of required governmental approvals, the accuracy of capital and operating cost estimates, the ability of the Company to operate in a safe, efficient and effective manner and the ability of the Company to obtain financing as and when required and on reasonable terms. Readers are cautioned that the foregoing list is not exhaustive of all factors and assumptions which may have been used by the Company. Although management believes that the assumptions made by the Company and the expectations represented by such information are reasonable, there can be no assurance that the forwardlooking information will prove to be accurate. Forward-looking information involves known and unknown risks, uncertainties, and other factors which may cause the actual results, performance or achievements of the Company to be materially different from any anticipated future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, the actual market price of gold, the actual results of current exploration, the actual results of future exploration, changes in project parameters as plans continue to be evaluated, as well as those factors disclosed in the Company's publicly filed documents. The Company believes that the assumptions and expectations reflected in the forward-looking information are reasonable. Assumptions have been made regarding, among other things, the Company’s ability to carry on its exploration and development activities, the timely receipt of required approvals, the price of gold, the ability of the Company to operate in a safe, efficient and effective manner and the ability of the Company to obtain financing as and when required and on reasonable terms. Readers should not place undue reliance on forward-looking information. Perseus does not undertake to update any forward-looking information, except in accordance with applicable securities laws.

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ASX/TSX CODE: PRU

REGISTERED OFFICE:

Level 2 437 Roberts Road Subiaco WA 6008 Telephone: +61 8 6144 1700 Email: [email protected] ABN: 27 106 808 986

www.perseusmining.com

CONTACTS: Nathan Ryan Media Relations +61 4 20 582 887 [email protected] Jeff Quartermaine Managing Director & CEO [email protected]

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APPENDIX 1 - FIGURES

Figure 1: Yaouré Gold Project – Tenements and Prospects

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Figure 2: Yaouré Gold Mine Site Layout Showing Deposit Locations

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Figure 3: Orientation of Major Mineralised Y and S Structures in Relation to Yaouré Mine Designs

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Figure 4 4: Yaouré Open Pit and CMA Underground Resource Drilling and Results Summary

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Figure 55: 30 June 2023 CMA Underground Mineral Resource and Ore Reserve Long Section

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Figure 66: Yaouré Open Pit Resource showing Indicated and Inferred Resource Estimate above 0.4 g/t Gold Cut-off – Drill Section 777,250mN (+/-12.5m window)

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Figure 77: Isometric (inclined) view of CMA Stage 3 Open Pit and CMA Underground Ore Reserve showing Pillar Locations

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Figure 88: Isometric view of the CMA stage 3 pit, underground Ore Reserve design shown coloured by mining schedule

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APPENDIX 2 – SIGNIFICANT INTERCEPTS TABLES

Table 2.1: CMA underground and Yaouré open pit resource drilling - drill holes and significant assays

Based on lower cut-off of 0.5 g/t gold with maximum 2m internal waste <0.5 g/t gold

NSI = No Significant Intercepts

Hole ID East
(WGS Z30N)
North
(WGS Z30N)
Elevation
(WGS
Z30N)
Drill
Type
Azimuth Dip Depth
(m)
From
(m)
Width
(m)
Au
(g/t)
CMA Underground Resource Drilling
YRC2178D
221,885.4
777,284.9
292.3
RCD
271
-76.9
415.2
278.0
3.0
0.54
YRC2179D
221,920.1
777,235.1
293.7
RCD
271
-65.2
420.4
NSI
YRC2183D
221,889.6
777,185.0
302.3
RCD
271
-68.6
405.2
360.0
4.4
0.74
YRC2183D
And
374.0
19.0
1.48
YRC2184D
221,964.7
777,185.0
307.8
RCD
268
-67.6
450.5
0.0
3.0
1.49
YRC2184D
And
263.0
3.0
0.55
YRC2184D
And
403.0
2.5
1.45
YRC2184D
And
431.0
3.0
0.63
YRC2186D
221,869.7
777,135.1
314.7
RCD
265
-60.9
405.3
363.0
12.0
6.70
YRC2186D
Including
365.0
3.0
13.45
YRC2186D
And
392.0
2.0
0.56
YRC2187D
221,874.8
777,135.1
315.1
RCD
268
-68.1
415.3
5.0
2.0
1.70
YRC2187D
And
362.0
15.2
4.50
YRC2187D
Including
367.0
3.0
7.67
YRC2187D
Including
373.0
2.0
12.85
YRC2188D
221,899.7
777,084.9
327.5
RCD
272
-61.5
425.3
26.0
6.0
2.11
YRC2188D
And
333.0
2.0
1.30
YRC2188D
And
363.0
8.0
1.12
YRC2188D
And
393.5
3.3
4.38
YRC2189D
221,904.9
777,085.1
327.9
RCD
269
-69.1
435.0
24.0
5.0
1.69
YRC2189D
And
343.0
4.0
7.96
YRC2189D
And
387.0
2.0
1.02
YRC2189D
And
397.0
2.0
0.59
YRC2189D
And
409.0
2.0
0.62
YRC2190D
221,910.0
777,085.2
328.1
RCD
271
-75.8
453.7
412.0
3.0
0.87
YRC2191D
221,914.9
777,085.5
328.3
RCD
267
-82.6
470.8
445.0
2.2
1.74
YRC2192D
221,849.4
777,534.9
278.5
RCD
269
-69.1
420.4
199.0
2.0
2.87
YRC2192D
And
375.0
3.6
0.88
YRC2192D
And
395.0
4.0
3.35
YRC2193D
221,844.7
777,534.9
278.3
RCD
270
-53.6
405.1
115.0
3.0
2.61
YRC2193D
And
370.0
3.0
0.58
YRC2193D
And
376.0
12.0
3.68
YRC2193D
Including
377.0
3.0
11.85

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Hole ID East
(WGS Z30N)
North
(WGS Z30N)
Elevation
(WGS
Z30N)
Drill
Type
Azimuth Dip Depth
(m)
From
(m)
Width
(m)
Au
(g/t)
YRC2193D
And
396.0 2.0
1.52
YRC2194D
221,854.8
777,535.5
278.9
RCD
271
-82.6
455.3
80.0
3.0
1.44
YRC2194D
And
152.0 4.0
0.91
YRC2194D
And
403.0 2.0
1.23
YRC2194D
And
418.6 8.4
2.88
YRC2195D
221,844.6
777,575.2
276.3
RCD
273
-82.5
453.5
20.0
13.0
5.24
YRC2195D
Including
20.0 9.0
7.03
YRC2195D
And
142.0 3.0
1.38
YRC2195D
And
377.0 3.0
1.02
YRC2195D
And
426.0 5.0
3.29
YRC2195D
Including
428.0 2.0
6.67
YRC2196D
221,855.2
777,685.0
268.9
RCD
274
-78.6
470.2
21.0
4.0
4.49
YRC2196D
And
73.0 2.0
2.29
YRC2196D
And
423.0 4.0
3.57
YRC2196D
And
443.0 8.0
0.84
YRC2197D
221,879.5
777,385.0
298.5
RCD
276
-86.7
468.5
160.0
4.0
1.56
YRC2197D
And
188.0 4.0
0.53
YRC2197D
And
449.0 13.0
1.76
YRC2198D
221,885.1
777,385.4
299.2
RCD
96
-86.3
501.3
142.0
2.0
0.88
YRC2198D
And
155.0 3.0
1.95
YRC2198D
And
227.0 2.0
0.61
YRC2198D
And
234.0 3.0
0.60
YRC2198D
And
469.1 5.9
1.62
YRC2198D
And
480.0 8.0
2.84
YRC2198D
Including
484.0 2.0
6.67
YRC2198D
And
492.0 9.0
1.46
YRC2199D
221,904.9
777,334.6
299.9
RCD
305
-86.7
475.5
240.0
2.0
1.66
YRC2199D
And
445.0 11.7
1.68
YRC2200D
221,925.2
777,285.0
298.9
RCD
247
-82.2
455.3
279.0
2.0
0.94
YRC2200D
And
305.0 4.0
2.51
YRC2200D
And
410.0 8.0
2.93
YRC2200D
And
423.0 4.0
1.01
YRC2200D
And
432.0 2.0
1.03
YRC2201D
221,854.8
777,484.9
282.8
RCD
234
-89.7
480.8
136.0
3.0
0.70
YRC2201D
And
428.0 2.0
14.38
YRC2201D
And
442.0 5.0
0.85
YRC2201D
And
471.0 5.0
1.83
YRC2202D
222,014.5
777,034.9
354.9
RCD
274
-67.9
489.9
75.0
2.0
0.62
YRC2202D
And
361.0 2.0
0.56

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Hole ID East
(WGS Z30N)
North
(WGS Z30N)
Elevation
(WGS
Z30N)
Drill
Type
Azimuth Dip Depth
(m)
From
(m)
Width
(m)
Au
(g/t)
YRC2202D
And
389.0 4.0
1.74
YRC2202D
And
468.0 6.0
0.73
YRC2203D
221,974.9
776,934.9
357.5
RCD
271
-67.2
465.4
4.0
4.0
0.51
YRC2203D
And
301.0 2.1
1.38
YRC2203D
And
315.0 12.0
1.21
YRC2204D
221,829.7
776,785.3
349.7
RCD
273
-70.4
370.7
175.0
2.0
1.01
YRC2204D
And
256.0 8.0
4.05
YRC2204D
And
354.0 2.0
0.65
YRC2205D
221,880.3
776,685.1
337.3
RCD
270
-75.5
395.3
355.5
2.3
0.66
YRC2206D
221,805.3
776,685.0
341.9
RCD
270
-69.5
351.3
0.0
4.0
0.50
YRC2207D
221,804.9
776,585.2
337.1
RCD
270
-67.1
340.3
4.0
4.0
0.57
YRC2208D
221,904.1
776,585.0
324.9
RCD
269
-70.1
380.5
NSI
YRC2209D
221,930.3
777,285.1
299.1
RCD
287
-85.4
480.3
433.0
4.0
2.63
YRC2209D
And
468.0 11.1
1.43
YRC2210D
221,899.3
777,334.9
299.2
RCD
272
-80.4
450.2
NSI
YRC2211D
221,556.0
777,735.9
255.8
RCD
270
-65.9
300.3
52.0
4.0
4.32
YRC2211D
And
120.0 5.0
2.24
YRC2211D
And
262.0 10.0
2.33
YRC2212D
221,558.6
777,779.9
254.9
RCD
267
-63.1
336.3
131.0
5.0
1.03
YRC2212D
And
304.0 10.0
3.43
YRC2212D
Including
307.0 2.0
7.82
YRC2213D
221,603.2
777,735.7
257.8
RCD
272
-66.6
320.2
140.0
2.0
1.60
YRC2213D
And
147.0 4.0
1.13
YRC2213D
And
293.0 11.0
3.21
YRC2213D
Including
296.7 5.5
5.16
YRC2214D
221,630.9
777,780.0
257.1
RCD
270
-67.0
372.1
217.0
4.0
0.52
YRC2214D
And
301.0 2.0
1.18
YRC2214D
And
334.4 4.6
7.61
YRC2214D
And
343.8 2.5
2.04
YRC2214D
And
350.8 2.2
4.36
YRC2215D
221,849.8
777,685.1
268.7
RCD
269
-72.3
450.3
12.0
4.0
3.13
YRC2215D
And
25.0 5.0
0.80
YRC2215D
And
140.0 2.0
0.84
YRC2215D
And
412.0 2.0
4.08
YRC2215D
And
417.0 4.0
2.57
YRC2215D
And
424.0 8.0
3.12
YRC2216D
221,714.0
777,736.0
267.0
RCD
270
-63.7
390.2
295.7
8.3
2.16
YRC2216D
And
357.0 14.0
2.74
YRC2216D
Including
364.5 3.4
8.80

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Hole ID East
(WGS Z30N)
North
(WGS Z30N)
Elevation
(WGS
Z30N)
Drill
Type
Azimuth Dip Depth
(m)
From
(m)
Width
(m)
Au
(g/t)
YRC2217D
221,849.9
777,785.0
267.5
RCD
270
-62.6
480.3
54.0
5.0
3.20
YRC2217D
And
315.0 3.0
1.67
YRC2217D
And
376.0 13.0
2.63
YRC2217D
And
437.0 6.0
1.99
YRC2217D
And
456.0 16.0
2.66
YRC2217D
Including
460.0 5.0
5.08
YRC2218D
221,850.2
777,634.9
272.4
RCD
273
-82.3
465.5
359.0
4.0
1.81
YRC2218D
And
454.2 2.4
3.86
YRC2219D
221,849.9
777,484.9
282.3
RCD
270
-81.1
445.6
405.7
5.3
4.96
YRC2219D
And
424.0 7.0
3.90
YRC2219D
Including
424.0 2.0
9.21
YRC2220D
221,865.6
777,435.1
289.9
RCD
276
-80.4
456.5
414.0
12.0
5.50
YRC2220D
Including
424.0 2.0
21.0
YRC2220D
And
446.1 3.6
3.21
YRC2221D
222,074.7
776,635.0
296.3
RCD
267
-59.5
438.2
NSI
YRC2222D
221,975.0
777,234.7
308.5
RCD
270
-73.2
471.6
17.0
2.0
1.30
YRC2222D
And
410.6 5.4
0.81
YRC2222D
And
427.0 5.0
0.79
YRC2222D
And
437.0 4.0
0.99
YRC2223D
221,848.4
777,583.5
276.0
RCD
270
-64.3
420.9
16.0
9.0
4.94
YRC2223D
Including
16.0 1.0
18.89
YRC2223D
And
384.0 6.0
0.60
YRC2223D
And
397.6 4.5
4.24
YRC2224D
221,850.7
777,583.3
276.2
RCD
270
-72.0
435.4
27.0
3.0
5.82
YRC2224D
And
357.0 3.0
3.48
YRC2224D
And
408.0 4.0
2.58
Yaouré Open Pit Resource Drilling
YDD0579
220,620.1
777,149.7
211.1
DD
263
-60.3
183.4
137.1
4.9
2.60
YDD0579
And
157.0
4.0
0.89
YDD0579
And
164.0
11.0
7.27
YDD0579
Including
164.0
6.0
12.0
YDD0580
221,028.9
777,549.8
238.9
DD
269
-60.6
243.1
38.0
3.0
0.57
YDD0580
And
68.0
4.0
2.92
YDD0580
And
160.0
6.0
6.00
YDD0580
Including
160.0
2.0
16.19
YDD0580
And
192.5
4.5
1.00
YDD0581
220,585.9
777,147.5
212.8
DD
269
-60.5
132.6
2.0
5.0
2.00
YDD0581
And
11.0
15.0
12.86
YDD0581
Including
17.6
3.4
32.52

PERSEUSMINING.COM

28

NEWS RELEASE | PERSEUS MINING ANNOUNCES OPEN PIT AND UNDERGROUND ORE RESERVE UPDATE AT YAOURÉ

==> picture [110 x 35] intentionally omitted <==

Hole ID East
(WGS Z30N)
North
(WGS Z30N)
Elevation
(WGS
Z30N)
Drill
Type
Azimuth Dip Depth
(m)
From
(m)
Width
(m)
Au
(g/t)
YDD0581
Including
24.0 2.0
34.50
YDD0581
And
76.5 11.5
16.25
YDD0581
Including
77.0 3.0
42.87
YDD0581
Including
86.0 1.0
23.58
YDD0581
And
93.0 6.0
0.60
YDD0581
And
102.0 2.3
1.78
YDD0581
And
122.0 3.0
5.08
YDD0582
220,493.7
776,899.9
251.2
DD
272
-60.0
111.3
36.9
4.1
1.35
YDD0582
And
52.0 3.0
1.74
YDD0583
220,502.0
776,849.8
253.9
DD
268
-59.1
111.2
55.0
2.0
1.71
YDD0583
And
80.3 3.7
1.92
YDD0584
220,930.6
777,599.8
236.7
DD
269
-72.5
244.6
0.0
22.0
1.31
YDD0584
And
34.0 3.0
6.41
YDD0584
And
70.0 3.0
1.88
YDD0584
And
78.0 3.0
1.32
YDD0584
And
86.1 2.8
0.85
YDD0584
And
126.4 2.7
3.48
YDD0584
And
218.0 3.0
1.36
YDD0584
And
230.0 3.0
1.06
YDD0585
220,903.5
777,651.0
235.7
DD
87
-60.3
180.3
91.1
2.0
2.97
YDD0585
And
150.0 2.0
1.58
YDD0586
220,846.5
777,700.2
235.7
DD
0
-75.1
162.6
NSI
YDD0587
220,996.1
776,969.5
250.0
DD
144
-74.0
102.6
15.0
8.3
1.06
YDD0587
And
23.6 3.8
1.15
YDD0587
And
35.6 6.4
0.53
YDD0587
And
48.7 5.0
0.57
YDD0587
And
71.9 2.1
5.31
YDD0588
220,956.1
776,475.3
282.7
DD
113
-74.8
120.5
45.4
3.8
0.57
YDD0589
And
100.1 2.5
6.86
YDD0589
And
170.5 8.2
0.99
YDD0590
220,846.6
777,701.1
235.7
DD
264
-80.7
160.6
3.0
2.0
0.95
YDD0590
And
28.0 2.0
1.51
YDD0590
And
110.0 2.0
1.87
YDD0591
220,938.9
777,758.0
241.9
DD
269
-59.3
133.3
NSI
YDD0593
220,782.1
777,199.9
213.1
DD
266
-59.4
207.3
38.9
8.8
3.11
YDD0593
Including
41.0 3.7
5.51
YDD0593
And
56.0 12.6
1.16
YDD0593
And
82.0 3.0
4.97
YDD0593
And
97.0 2.0
3.10
YRC2225D
221,005.9
776,549.9
279.0
RCD
272
-61.4
190.7
113.0
2.0
0.56

PERSEUSMINING.COM

29

NEWS RELEASE | PERSEUS MINING ANNOUNCES OPEN PIT AND UNDERGROUND ORE RESERVE UPDATE AT YAOURÉ

==> picture [110 x 35] intentionally omitted <==

Hole ID East
(WGS Z30N)
North
(WGS Z30N)
Elevation
(WGS
Z30N)
Drill
Type
Azimuth Dip Depth
(m)
From
(m)
Width
(m)
Au
(g/t)
YRC2225D
And
124.0 10.0
0.87
YRC2225D
And
148.0 4.0
0.65
YRC2225D
And
162.0 2.0
0.88
YRC2226D
221,038.2
776,500.0
280.3
RCD
276
-61.6
198.2
4.0
4.0
1.04
YRC2226D
And
56.0 3.0
1.02
YRC2226D
And
62.0 3.0
3.15
YRC2226D
And
133.0 2.0
1.77
YRC2226D
And
151.0 5.0
35.22
YRC2227D
221,062.4
777,600.0
241.6
RCD
270
-60.4
315.1
13.0
8.0
4.54
YRC2227D
Including
16.0 4.0
6.91
YRC2227D
And
43.0 4.0
1.12
YRC2227D
And
51.0 7.6
0.71
YRC2227D
And
64.0 22.0
1.27
YRC2227D
And
97.0 7.0
0.63
YRC2227D
And
130.0 3.0
4.51
YRC2227D
And
184.0 2.0
0.79
YRC2227D
And
204.0 3.0
0.97
YRC2227D
And
251.0 5.0
4.39
YRC2227D
And
269.0 5.0
1.39
YRC2227D
And
292.0 3.0
4.45
YRC2227D
And
300.7 2.3
0.59
YRC2227D
And
308.0 6.0
0.59
YRC2228D
221,070.0
777,549.8
237.8
RCD
268
-59.9
250.3
40.0
5.0
2.18
YRC2228D
And
104.0 2.2
0.78
YRC2228D
And
123.0 4.3
1.11
YRC2228D
And
140.8 3.2
8.62
YRC2228D
And
152.0 3.0
5.74
YRC2228D
And
177.1 6.9
1.77
YRC2228D
And
197.0 5.0
0.73
YRC2229D
221,077.1
777,649.6
242.1
RCD
270
-59.5
327.0
110.0
5.0
1.37
YRC2229D
And
189.0 4.0
7.34
YRC2229D
And
198.0 4.0
0.95
YRC2229D
And
252.0 3.0
3.84
YRC2229D
And
324.0 3.0
0.99
YRC2230D
220,906.9
777,598.7
236.4
RCD
267
-59.1
243.1
4.0
2.0
1.40
YRC2230D
And
7.0 15.0
1.25
YRC2230D
And
25.0 3.0
0.76
YRC2230D
And
36.0 2.0
0.91
YRC2230D
And
47.0 2.0
1.28
YRC2230D
And
70.0 4.0
0.71

PERSEUSMINING.COM

30

NEWS RELEASE | PERSEUS MINING ANNOUNCES OPEN PIT AND UNDERGROUND ORE RESERVE UPDATE AT YAOURÉ

==> picture [110 x 35] intentionally omitted <==

Hole ID East
(WGS Z30N)
North
(WGS Z30N)
Elevation
(WGS
Z30N)
Drill
Type
Azimuth Dip Depth
(m)
From
(m)
Width
(m)
Au
(g/t)
YRC2230D
And
114.0 4.3
1.36
YRC2230D
And
219.0 3.0
1.16
YRC2231D
220,878.6
777,650.0
234.9
RCD
269
-60.4
222.2
63.6
3.4
1.54
YRC2232
220,843.0
777,699.9
235.7
RC
271
-59.5
142.0
91.0
2.0
2.05
YRC2232
And
96.0 2.0
2.06
YRC2232
And
124.0 6.0
1.13
YRC2233D
220,726.8
777,250.1
214.8
RCD
270
-59.6
210.7
20.0
4.0
1.79
YRC2233D
And
33.0 5.0
0.89
YRC2233D
And
59.0 2.0
1.41
YRC2233D
And
81.6 2.4
1.15
YRC2234D
220,702.6
777,300.0
213.8
RCD
271
-60.7
270.3
21.0
3.0
1.76
YRC2234D
And
93.0 9.0
1.01
YRC2234D
And
106.0 2.0
1.19
YRC2234D
And
111.0 6.0
2.79
YRC2234D
And
121.0 22.0
1.59
YRC2234D
And
161.0 3.0
2.14
YRC2234D
And
167.0 4.0
3.50
YRC2235D
220,685.9
776,950.0
220.3
RCD
269
-59.4
180.7
18.0
2.0
2.55
YRC2235D
And
156.2 5.3
6.05
YRC2235D
And
170.3 2.7
1.47
YRC2236D
220,723.3
776,999.9
220.2
RCD
273
-60.2
220.2
24.0
3.0
0.85
YRC2236D
And
96.0 3.0
1.51
YRC2236D
And
113.0 6.0
1.09
YRC2236D
And
123.0 2.0
4.28
YRC2236D
And
152.0 6.0
1.11
YRC2236D
And
204.0 5.2
1.94
YRC2237D
220,777.0
777,149.8
213.4
RCD
271
-59.9
261.5
17.0
3.0
1.35
YRC2237D
And
27.0 9.0
1.71
YRC2237D
And
67.0 4.0
1.96
YRC2237D
And
149.0 3.0
0.55
YRC2237D
And
155.0 4.0
0.56
YRC2237D
And
196.7 3.3
0.76
YRC2237D
And
203.0 2.0
1.45
YRC2237D
And
223.0 4.0
0.74
YRC2237D
And
234.0 2.0
1.39
YRC2237D
And
245.0 2.1
4.34
YRC2238D
220,689.0
777,250.0
213.3
RCD
270
-60.6
186.4
5.0
3.0
3.06
YRC2238D
And
74.0 2.0
1.07
YRC2238D
And
91.0 4.0
0.68
YRC2238D
And
160.0 5.0
1.54

PERSEUSMINING.COM

31

NEWS RELEASE | PERSEUS MINING ANNOUNCES OPEN PIT AND UNDERGROUND ORE RESERVE UPDATE AT YAOURÉ

==> picture [110 x 35] intentionally omitted <==

Hole ID East
(WGS Z30N)
North
(WGS Z30N)
Elevation
(WGS
Z30N)
Drill
Type
Azimuth Dip Depth
(m)
From
(m)
Width
(m)
Au
(g/t)
YRC2239D
220,675.8
777,226.9
213.0
RCD
269
-59.7
186.3
22.0
4.0
3.00
YRC2239D
And
55.0 3.0
5.04
YRC2239D
And
70.0 5.0
2.13
YRC2239D
And
78.0 6.0
0.77
YRC2239D
And
88.0 4.0
1.52
YRC2239D
And
166.0 4.0
1.51
YRC2239D
And
178.0 3.3
1.55
YRC2240D
220,612.0
777,400.0
213.6
RCD
270
-60.9
159.6
0.0
11.0
1.35
YRC2240D
And
20.0 4.0
1.25
YRC2240D
And
28.0 2.0
2.34
YRC2241D
220,776.4
777,049.9
214.0
RCD
268
-60.1
213.4
1.0
2.0
0.58
YRC2241D
And
45.0 2.0
1.62
YRC2241D
And
49.4 7.6
1.11
YRC2241D
And
63.0 5.0
4.27
YRC2241D
And
132.0 6.0
0.77
YRC2241D
And
155.0 11.8
2.16
YRC2242D
220,959.4
776,700.0
266.8
RCD
272
-59.3
255.1
136.0
3.0
1.04
YRC2242D
And
191.6 2.0
3.47
YRC2242D
And
214.0 7.0
1.06
YRC2242D
And
225.0 7.5
0.94
YRC2243D
220,962.2
776,650.0
270.4
RCD
270
-59.1
210.4
18.0
6.0
0.65
YRC2243D
And
36.0 2.0
0.84
YRC2243D
And
162.0 3.6
5.01
YRC2243D
And
173.0 5.7
0.77
YRC2244
220,896.3
776,374.9
299.8
RC
269
-61.0
95.0
NSI
YRC2245
220,572.4
776,375.1
286.2
RC
272
-58.9
80.0
0.0
4.0
0.52
YRC2246
220,602.7
776,350.1
290.7
RC
271
-60.2
105.0
1.0
3.0
5.24
YRC2246
And
87.0 3.0
1.66
YRC2247D
220,515.7
776,874.9
252.5
RCD
270
-59.4
120.2
84.6
4.3
2.65
YRC2248D
220,882.2
777,199.8
213.8
RCD
270
-61.0
190.7
0.0
4.0
0.73
YRC2248D
And
8.0 4.0
0.64
YRC2248D
And
20.0 28.3
6.63
YRC2248D
Including
24.0 8.0
12.2
YRC2248D
Including
40.0 3.0
18.76
YRC2248D
And
70.6 21.4
1.23
YRC2248D
And
113.0 11.0
2.68
YRC2248D
Including
120.3 2.7
5.64
YRC2248D
And
137.0 4.0
1.25
YRC2248D
And
152.0 2.0
1.23
YRC2248D
And
160.0 4.0
1.37

PERSEUSMINING.COM

32

NEWS RELEASE | PERSEUS MINING ANNOUNCES OPEN PIT AND UNDERGROUND ORE RESERVE UPDATE AT YAOURÉ

==> picture [110 x 35] intentionally omitted <==

Hole ID East
(WGS Z30N)
North
(WGS Z30N)
Elevation
(WGS
Z30N)
Drill
Type
Azimuth Dip Depth
(m)
From
(m)
Width
(m)
Au
(g/t)
YRC2249D
220,873.9
777,249.8
215.1
RCD
267
-60.0
219.7
110.0
5.0
0.63
YRC2249D
And
151.0 5.0
45.91
YRC2249D
Including
151.0 3.0
75.55
YRC2249D
And
188.0 2.0
1.01
YRC2250D
220,819.1
777,250.0
212.6
RCD
268
-58.3
216.7
33.0
6.0
1.23
YRC2250D
And
46.0 3.0
0.80
YRC2250D
And
63.7 5.1
0.63
YRC2250D
And
77.9 4.1
2.02
YRC2250D
And
92.2 4.9
22.41
YRC2250D
And
112.0 2.0
20.85
YRC2250D
And
163.0 8.0
2.51
YRC2250D
And
207.0 8.0
1.00
YRC2251D
220,588.1
777,100.0
221.8
RCD
269
-59.3
159.3
32.0
3.0
3.31
YRC2251D
And
41.0 2.0
2.08
YRC2252D
220,720.8
777,050.0
215.6
RCD
271
-60.5
160.3
42.0
4.0
0.52
YRC2252D
And
131.0 4.0
1.05
YRC2253D
220,615.1
777,300.0
214.1
RCD
271
-60.8
150.6
NSI
YRC2254D
220,718.6
777,102.7
212.7
RCD
269
-60.2
174.3
0.0
2.0
6.83
YRC2254D
And
15.0 3.0
0.91
YRC2254D
And
34.0 2.0
1.77
YRC2254D
And
80.0 6.0
0.90
YRC2254D
And
90.0 2.0
0.91
YRC2254D
And
136.0 2.0
0.98
YRC2254D
And
143.0 5.0
1.04
YRC2254D
And
165.0 6.0
1.06
YRC2255D
220,859.5
776,750.0
226.1
RCD
273
-73.6
99.4
84.0
3.0
0.58
YRC2256D
220,977.9
776,749.9
260.2
RCD
268
-59.9
192.1
175.0
4.0
0.75
YRC2256D
And
186.0 3.0
1.41
YRC2257
220,543.6
776,900.0
250.7
RC
271
-59.3
115.0
100.0
2.0
3.14
YRC2258
220,596.6
776,324.7
289.8
RC
270
-60.5
75.0
NSI
YRC2259
220,450.1
776,849.9
254.9
RC
269
-56.1
110.0
NSI
YRC2260
220,444.9
776,900.0
253.0
RC
270
-60.3
90.0
20.0
12.0
1.33
YRC2260
220,444.9
776,900.0
253.0
RC
270
-60.3
90.0
35.0
2.0
2.59
YRC2261
220,551.5
776,850.0
253.4
RC
267
-61.2
117.0
9.0
2.0
2.30
YRC2261
And
18.0 2.0
1.22
YRC2261
And
35.0 4.0
0.82
YRC2261
And
90.0 4.0
1.81
YRC2261
And
108.0 9.0
0.64
YRC2262D
220,611.0
776,999.8
245.5
RCD
270
-65.9
180.5
127.0
2.7
2.07
YRC2262D
And
138.0 2.0
0.72

PERSEUSMINING.COM

33

NEWS RELEASE | PERSEUS MINING ANNOUNCES OPEN PIT AND UNDERGROUND ORE RESERVE UPDATE AT YAOURÉ

==> picture [110 x 35] intentionally omitted <==

Hole ID East
(WGS Z30N)
North
(WGS Z30N)
Elevation
(WGS
Z30N)
Drill
Type
Azimuth Dip Depth
(m)
From
(m)
Width
(m)
Au
(g/t)
YRC2262D
And
154.4 3.9
0.61
YRC2263D
220,882.0
777,000.0
220.5
RCD
271
-69.3
145.5
30.0
2.0
21.55
YRC2263D
And
56.0 3.0
0.95
YRC2263D
And
79.0 9.0
0.74
YRC2263D
And
91.0 3.0
2.66
YRC2263D
And
104.0 3.0
1.83
YRC2263D
And
110.0 3.0
4.19
YRC2264D
220,886.5
776,949.9
224.4
RCD
270
-59.4
150.4
32.0
9.2
2.81
YRC2265D
220,820.0
777,000.0
217.0
RCD
273
-69.7
270.9
40.0
2.0
1.82
YRC2265D
And
67.0 3.5
1.33
YRC2265D
And
81.0 7.0
1.48
YRC2265D
And
97.0 6.5
0.90
YRC2265D
And
128.0 9.0
1.63
YRC2265D
And
145.0 7.0
0.75
YRC2265D
And
182.0 2.0
0.89
YRC2265D
And
209.0 4.5
0.62
YRC2265D
And
221.6 2.4
1.58
YRC2265D
And
241.0 5.5
0.94
YRC2266D
220,805.7
777,050.1
214.9
RCD
269
-58.8
267.4
21.0
3.0
1.68
YRC2266D
And
175.5 8.2
1.87
YRC2267D
220,640.5
776,975.9
230.2
RCD
271
-59.6
180.3
77.0
2.0
2.91
YRC2267D
And
118.6 3.0
1.51
YRC2267D
And
166.4 2.5
2.65
YRC2267D
And
171.7 2.3
11.57
YRC2268D
220,659.0
776,999.8
230.1
RCD
267
-63.3
183.3
8.0
4.0
1.95
YRC2268D
And
20.0 4.0
0.54
YRC2268D
And
59.9 3.2
0.52
YRC2268D
And
117.0 2.7
1.02
YRC2269D
220,614.6
777,058.0
226.6
RCD
269
-58.7
135.3
68.0
6.0
1.73
YRC2270D
220,656.3
777,049.9
225.2
RCD
270
-58.7
135.3
40.0
3.0
1.14
YRC2270D
And
96.0 2.0
0.86
YRC2271D
220,630.0
777,163.0
210.1
RCD
270
-60.8
195.6
148.4
2.3
1.62
YRC2272D
220,777.6
777,335.3
216.6
RCD
268
-60.9
300.3
127.0
7.0
1.92
YRC2272D
And
146.0 58.6
2.31
YRC2272D
Including
188.0 5.0
8.45
YRC2272D
And
226.0 12.0
1.40
YRC2272D
And
241.0 7.1
3.04
YRC2272D
Including
241.0 2.0
7.88
YRC2272D
And
268.6 2.0
3.57
YRC2273D
220,731.3
777,160.2
217.2
RCD
269
-60.6
235.4
12.0
3.0
1.11

PERSEUSMINING.COM

34

NEWS RELEASE | PERSEUS MINING ANNOUNCES OPEN PIT AND UNDERGROUND ORE RESERVE UPDATE AT YAOURÉ

==> picture [110 x 35] intentionally omitted <==

Hole ID East
(WGS Z30N)
North
(WGS Z30N)
Elevation
(WGS
Z30N)
Drill
Type
Azimuth Dip Depth
(m)
From
(m)
Width
(m)
Au
(g/t)
YRC2273D
And
66.0 6.0
1.79
YRC2273D
And
159.3 3.8
2.55
YRC2273D
And
172.0 3.0
0.94
YRC2273D
And
180.8 11.2
1.69
YRC2273D
And
197.0 2.0
0.95
YRC2273D
And
203.0 2.0
0.80
YRC2273D
And
207.1 3.6
0.64
YRC2273D
And
217.0 4.0
1.14
YRC2274
220,880.7
776,900.0
226.3
RC
270
-69.2
85.0
19.0
7.0
0.69
YRC2275
220,774.8
776,700.7
230.4
RC
270
-59.7
80.0
NSI
YRC2276D
221,014.7
777,501.0
240.0
RCD
269
-60.8
231.1
76.8
4.0
1.30
YRC2276D
And
116.1 2.8
2.28
YRC2276D
And
151.5 6.5
2.85
YRC2277D
221,032.5
777,649.9
240.7
RCD
268
-58.0
270.1
97.0
8.9
1.71
YRC2277D
And
113.8 2.2
0.98
YRC2277D
And
126.0 6.0
0.79
YRC2277D
And
165.7 5.4
2.71
YRC2277D
And
197.0 3.4
0.80
YRC2277D
And
209.0 4.2
4.68
YRC2277D
And
220.0 2.0
0.93
YRC2277D
And
225.5 6.6
0.91
YRC2278
220,669.3
777,399.9
211.0
RC
268
-61.4
163.0
29.0
5.0
0.88
YRC2278
And
40.0 4.0
2.21
YRC2278
And
70.0 5.0
2.68
YRC2278
And
84.0 6.0
1.44
YRC2278
And
128.0 4.0
0.57
YRC2279
220,578.0
776,449.8
279.1
RC
268
-58.7
100.0
NSI
YRC2280
220,586.3
776,400.0
283.5
RC
270
-61.1
110.0
37.0
2.0
2.23
YRC2281
220,590.6
776,299.8
289.8
RC
269
-58.4
55.0
NSI
YRC2282
220,550.0
777,324.9
232.7
RC
270
-58.7
120.0
NSI
YRC2283D
220,575.3
776,950.0
247.8
RCD
278
-75.8
145.7
98.0
2.0
0.81
YRC2283D
And
115.0 6.0
2.47
YRC2284D
220,974.4
776,901.1
249.7
RCD
278
-78.4
143.6
NSI
YRC2285D
220,657.9
777,219.4
210.6
RCD
267
-55.2
180.1
169.7
5.6
3.06
YRC2286D
220,838.3
777,296.2
225.1
RCD
269
-67.0
222.7
17.0
3.0
2.45
YRC2286D
And
82.0 3.0
5.16
YRC2286D
And
88.1 2.9
4.61
YRC2286D
And
111.0 2.0
15.26
YRC2286D
And
125.0 5.0
22.67
YRC2286D
Including
126.0 3.0
36.51

PERSEUSMINING.COM

35

NEWS RELEASE | PERSEUS MINING ANNOUNCES OPEN PIT AND UNDERGROUND ORE RESERVE UPDATE AT YAOURÉ

==> picture [110 x 35] intentionally omitted <==

Hole ID East
(WGS Z30N)
North
(WGS Z30N)
Elevation
(WGS
Z30N)
Drill
Type
Azimuth Dip Depth
(m)
From
(m)
Width
(m)
Au
(g/t)
YRC2287D
220,879.6
777,225.2
213.9
RCD
269
-49.2
217.6
8.0
3.0
4.39
YRC2287D
And
18.0 2.0
1.66
YRC2287D
And
32.0 3.0
1.18
YRC2287D
And
65.0 2.0
1.76
YRC2287D
And
172.0 2.0
8.96
YRC2287D
And
191.0 10.0
2.19
YRC2288D
221,010.8
777,525.3
239.8
RCD
271
-57.3
267.2
56.0
4.9
0.95
YRC2288D
And
84.0 4.0
0.81
YRC2288D
And
97.0 8.2
1.20
YRC2288D
And
238.0 3.0
4.79
YRC2289D
221,000.1
777,474.8
246.2
RCD
267
-56.9
213.1
0.0
8.0
0.71
YRC2289D
And
16.0 4.0
1.26
YRC2289D
And
24.0 4.0
1.27
YRC2289D
And
54.1 12.1
6.49
YRC2289D
Including
59.0 3.6
18.81
YRC2289D
And
118.0 8.0
1.77
YRC2289D
And
133.0 2.0
1.13
YRC2289D
And
157.0 3.0
8.08
YRC2290D
220,999.7
777,450.1
247.1
RCD
270
-55.0
180.1
77.7
6.4
0.70
YRC2291D
221,006.9
777,450.2
247.1
RCD
269
-65.8
183.1
84.0
11.0
0.95
YRC2292D
220,902.8
777,650.9
235.6
RCD
272
-69.7
207.4
67.7
10.5
11.78
YRC2292D
Including
74.0 3.3
34.54
YRC2292D
And
108.0 9.0
2.84
YRC2293D
220,920.0
777,624.5
236.2
RCD
271
-74.8
219.6
45.0
4.0
1.54
YRC2293D
And
53.0 3.0
0.50
YRC2293D
And
109.0 10.0
3.49
YRC2293D
Including
114.1 5.0
5.8
YRC2293D
And
154.0 2.0
0.71
YRC2293D
And
169.0 15.0
1.48
YRC2293D
And
209.0 5.0
1.05
YRC2294
220,778.3
777,750.8
229.2
RC
274
-76.2
100.0
NSI
YRC2295
220,656.4
777,249.9
209.8
RC
269
-50.5
146.0
125.0
14.0
2.27
YRC2295
Including
136.0 2.0
8.54
YRC2296
220,969.8
776,800.1
251.5
RC
271
-75.5
128.0
54.0
8.0
0.71
YRC2297
220,954.2
776,850.1
249.3
RC
272
-59.6
115.0
74.0
5.0
4.63
YRC2297
Including
74.0 2.0
10.97
YRC2298
220,871.4
776,350.0
306.7
RC
271
-61.1
100.0
NSI
YRC2299
220,923.7
776,350.1
306.1
RC
268
-60.9
100.0
NSI
YRC2300
220,846.1
776,700.5
228.2
RC
273
-74.9
116.0
44.0
5.0
1.22
YRC2300
And
52.0 10.0
12.36

PERSEUSMINING.COM

36

NEWS RELEASE | PERSEUS MINING ANNOUNCES OPEN PIT AND UNDERGROUND ORE RESERVE UPDATE AT YAOURÉ

==> picture [110 x 35] intentionally omitted <==

Hole ID East
(WGS Z30N)
North
(WGS Z30N)
Elevation
(WGS
Z30N)
Drill
Type
Azimuth Dip Depth
(m)
From
(m)
Width
(m)
Au
(g/t)
YRC2300
Including
55.0 2.0
59.02
YRC2300
And
93.0 9.0
3.66
YRC2301
220,802.2
776,659.8
231.1
RC
270
-49.8
104.0
0.0
5.0
1.62
YRC2301
And
33.0 2.0
0.70
YRC2302
220,842.9
776,300.4
324.2
RC
266
-59.0
95.0
0.0
8.0
1.11
YRC2303
220,788.8
776,299.8
317.9
RC
268
-59.0
90.0
65.0
4.0
1.81
YRC2304
220,858.1
776,302.1
323.9
RC
273
-83.4
87.0
1.0
7.0
1.26
YRC2305
220,922.8
776,325.0
313.9
RC
271
-61.2
110.0
NSI
YRC2306
220,850.6
776,325.7
317.0
RC
269
-60.2
110.0
NSI
YRC2307
220,915.0
776,650.6
271.2
RC
269
-49.8
160.0
53.0
3.0
1.97
YRC2307
And
118.0 11.0
1.34
YRC2307
And
134.0 9.0
3.18
YRC2308
220,588.3
776,424.9
281.9
RC
269
-59.7
80.0
NSI
YRC2309D
220,529.9
777,100.1
242.6
RCD
272
-75.6
120.6
4.0
4.0
0.60
YRC2309D
And
36.0 4.0
76.83
YRC2310D
220,839.8
777,296.2
225.2
RCD
288
-59.4
261.7
16.0
4.0
1.56
YRC2310D
And
28.0 4.0
0.69
YRC2310D
And
105.0 3.0
0.51
YRC2310D
And
111.0 5.0
2.27
YRC2310D
And
191.0 2.0
1.75
YRC2310D
And
230.0 2.0
1.23
YRC2310D
And
244.0 2.0
1.17
YRC2310D
And
255.0 6.7
1.73
YRC2311D
220,931.4
777,550.0
238.2
RCD
268
-59.9
230.4
0.0
4.0
1.64
YRC2311D
And
82.0 2.0
1.04
YRC2311D
And
94.0 3.0
0.85
YRC2311D
And
128.0 5.5
2.27
YRC2312D
220,754.9
777,114.0
214.3
RCD
272
-58.9
252.7
51.1
3.9
0.67
YRC2312D
And
75.0 7.0
0.57
YRC2312D
And
94.0 3.0
2.29
YRC2312D
And
100.4 4.7
1.34
YRC2312D
And
109.0 2.0
0.72
YRC2312D
And
132.9 3.1
1.70
YRC2312D
And
147.0 6.0
0.96
YRC2312D
And
158.0 3.0
23.18
YRC2312D
And
221.0 3.0
0.65
YRC2312D
And
228.0 5.5
1.34
YRC2312D
And
241.0 7.0
2.31
YRC2313D
220,780.4
777,335.2
216.7
RCD
292
-68.4
220.7
116.0
2.0
1.34
YRC2313D
And
123.0 3.0
1.32

PERSEUSMINING.COM

37

NEWS RELEASE | PERSEUS MINING ANNOUNCES OPEN PIT AND UNDERGROUND ORE RESERVE UPDATE AT YAOURÉ

==> picture [110 x 35] intentionally omitted <==

Hole ID East
(WGS Z30N)
North
(WGS Z30N)
Elevation
(WGS
Z30N)
Drill
Type
Azimuth Dip Depth
(m)
From
(m)
Width
(m)
Au
(g/t)
YRC2313D
And
153.0 6.0
2.46
YRC2313D
And
163.0 9.6
0.65
YRC2313D
And
191.0 7.2
1.22
YRC2313D
And
206.0 5.0
0.59
YRC2314D
220,742.5
777,375.1
211.8
RCD
270
-72.0
317.8
32.0
11.0
2.03
YRC2314D
And
53.0 4.1
1.15
YRC2314D
And
70.0 2.0
0.70
YRC2314D
And
115.0 12.0
0.75
YRC2314D
And
134.0 4.0
1.58
YRC2314D
And
168.0 2.0
1.02
YRC2314D
And
176.0 3.7
1.38
YRC2314D
And
183.0 3.0
0.53
YRC2314D
And
191.0 7.0
6.83
YRC2314D
And
210.0 4.0
0.69
YRC2314D
And
236.0 5.0
0.60
YRC2314D
And
248.0 4.0
0.79
YRC2314D
And
271.0 3.3
4.66
YRC2315D
220,704.2
777,400.0
209.7
RCD
295
-58.9
340.3
4.0
8.0
0.56
YRC2315D
And
24.0 4.0
2.16
YRC2315D
And
32.0 4.0
0.51
YRC2315D
And
94.7 2.4
1.22
YRC2315D
And
109.2 5.8
0.54
YRC2315D
And
121.0 14.5
0.93
YRC2315D
And
138.0 25.2
1.24
YRC2315D
And
181.0 5.0
0.52
YRC2315D
And
189.0 2.6
1.16
YRC2315D
And
230.0 3.4
1.20
YRC2315D
And
242.7 2.3
4.91
YRC2316D
220,659.0
777,474.5
206.9
RCD
285
-61.3
333.4
8.0
4.0
0.76
YRC2316D
And
92.0 3.0
3.48
YRC2316D
And
234.9 2.3
1.20
YRC2317D
220,664.0
777,449.7
207.0
RCD
268
-61.0
243.4
12.0
4.0
1.03
YRC2317D
And
24.0 8.0
0.85
YRC2317D
And
36.0 9.0
0.85
YRC2317D
And
50.0 7.0
0.83
YRC2317D
And
75.6 2.5
3.04
YRC2317D
And
115.5 3.6
1.89
YRC2317D
And
156.9 3.1
0.72
YRC2317D
And
199.0 5.6
1.44
YRC2318D
220,900.5
777,575.0
236.4
RCD
258
-51.6
250.3
4.0
4.0
0.64

PERSEUSMINING.COM

38

NEWS RELEASE | PERSEUS MINING ANNOUNCES OPEN PIT AND UNDERGROUND ORE RESERVE UPDATE AT YAOURÉ

==> picture [110 x 35] intentionally omitted <==

Hole ID East
(WGS Z30N)
North
(WGS Z30N)
Elevation
(WGS
Z30N)
Drill
Type
Azimuth Dip Depth
(m)
From
(m)
Width
(m)
Au
(g/t)
YRC2318D
And
119.9 6.1
2.08
YRC2318D
And
143.0 4.0
1.13
YRC2318D
And
225.0 8.9
0.69
YRC2319D
220,898.5
777,566.5
236.6
RCD
272
-60.2
260.3
0.0
8.0
1.51
YRC2319D
And
106.0 5.4
2.34
YRC2319D
And
116.0 13.6
3.22
YRC2319D
And
214.0 4.0
0.57
YRC2319D
And
231.0 4.0
0.86
YRC2319D
And
239.4 2.7
0.64
YRC2320D
220,994.8
776,969.2
250.0
RCD
267
-58.0
240.2
4.0
4.0
0.50
YRC2320D
And
20.0 16.0
1.26
YRC2320D
And
54.6 3.5
0.98
YRC2320D
And
63.0 3.7
0.67
YRC2320D
And
72.0 5.0
1.56
YRC2320D
And
83.0 7.0
2.60
YRC2320D
And
101.0 6.0
3.14
YRC2320D
And
187.0 4.0
5.83
YRC2320D
Including
187.8 2.2
9.50
YRC2320D
And
196.0 3.0
1.03
YRC2320D
And
204.0 7.0
1.14
YRC2320D
And
216.0 4.0
1.09
YRC2321D
220,973.8
776,908.2
249.2
RCD
268
-69.5
155.4
88.0
3.0
1.76
YRC2321D
And
105.0 3.0
2.12
YRC2322
220,753.1
776,618.3
250.2
RC
268
-59.5
78.0
NSI
YRC2323
220,806.6
776,612.9
250.3
RC
267
-60.7
150.0
0.0
2.0
0.66
YRC2323
And
136.0 4.0
4.41
YRC2324
220,730.3
777,699.9
208.8
RC
94
-84.3
90.0
11.0
2.0
3.08
YRC2324
And
66.0 3.0
0.85
YRC2325
220,716.9
777,700.0
208.0
RC
273
-59.9
86.0
NSI
YRC2326
220,701.8
777,749.8
216.0
RC
267
-63.3
72.0
44.0
2.0
2.50
YRC2327
220,678.7
777,760.9
217.1
RC
269
-50.6
74.0
NSI
YRC2328
220,923.3
776,849.6
242.4
RC
268
-49.7
156.0
9.0
4.0
16.51
YRC2328
And
40.0 2.0
1.73
YRC2328
And
53.0 5.0
7.79
YRC2328
And
73.0 4.0
0.73
YRC2328
And
95.0 2.0
2.53
YRC2328
And
111.0 7.0
1.10
YRC2328
And
137.0 14.0
0.52
YRC2329
220,955.9
776,476.2
282.7
RC
286
-58.9
170.0
3.0
5.0
0.74
YRC2329
And
17.0 2.0
5.59

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Hole ID East
(WGS Z30N)
North
(WGS Z30N)
Elevation
(WGS
Z30N)
Drill
Type
Azimuth Dip Depth
(m)
From
(m)
Width
(m)
Au
(g/t)
YRC2329
And
22.0 2.0
1.54
YRC2329
And
28.0 15.0
8.15
YRC2329
Including
37.0 4.0
28.9
YRC2329
And
55.0 7.0
6.75
YRC2329
Including
55.0 2.0
21.63
YRC2329
And
140.0 2.0
1.51
YRC2330
220,823.4
776,357.4
314.0
RC
267
-60.9
110.0
107.0
2.0
2.42
YRC2331
220,585.4
776,850.1
251.8
RC
269
-71.6
98.0
66.0
6.0
1.47
YRC2331
And
83.0 2.0
1.31
YRC2332
220,518.9
777,350.1
230.8
RC
271
-59.6
105.0
NSI
YRC2333
220,569.4
777,400.9
229.4
RC
270
-67.9
142.0
10.0
2.0
2.10
YRC2334
220,618.2
777,358.2
217.1
RC
287
-60.5
151.0
8.0
2.0
2.01
YRC2334
And
36.0 10.0
0.87
YRC2334
And
68.0 2.0
1.26
YRC2334
And
149.0 2.0
1.57
YRC2335
220,815.3
777,722.0
233.9
RC
271
-69.3
84.0
1.0
2.0
1.14
YRC2335
And
7.0 2.0
1.22
YRC2336
220,862.4
777,769.9
233.3
RC
269
-49.0
125.0
106.0
2.0
0.58
YRC2337
220,867.0
777,769.8
233.4
RC
271
-75.2
114.0
NSI
YRC2338
220,948.4
777,761.3
242.2
RC
272
-80.4
120.0
38.0
2.0
0.77
YRC2339D
220,988.0
776,550.0
278.3
RCD
270
-59.0
150.2
8.0
4.0
0.56
YRC2340D
220,978.5
776,748.5
260.4
RCD
270
-76.5
195.1
12.0
4.0
0.71
YRC2341D
221,000.2
776,969.5
250.2
RCD
272
-74.8
168.5
NSI
YRC2342D
220,780.3
777,150.0
213.1
RCD
275
-74.4
175.5
28.0
21.5
0.81
YRC2342D
And
103.0 3.7
2.24
YRC2342D
And
110.0 7.1
1.45
YRC2342D
And
144.0 2.0
2.18

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APPENDIX 3 – JORC TABLE 1

JORC 2012 Table 1 – Section 1 sampling techniques and data

(Criteria in this section apply to all succeeding sections)

Criteria JORC Code Explanation Commentary
Sampling Nature and quality of sampling (e.g. cut Yaouré Open Pit Mineral Resource estimate:
techniques channels, random chips, or specific
specialised industry standard
measurement tools appropriate to the
minerals under investigation, such as
down hole gamma sondes, or handheld
XRF instruments, etc.). These examples
should not be taken as limiting the broad
The Yaouré Open Pit Mineral Resource estimate is informed by 713 RC and 344
diamond (including RC pre-collars) core holes drilled by Amara Mining plc
between 2012 and 2015 and by 773 RC and 129 diamond (including RC pre-
collars) core holes drilled by Perseus Mining from 2017 onward. The resource
estimate is informed by a total of 1,959 drill holes for a total of 190,041.30
metres.
meaning of sampling. Diamond core drill holes account for approximately 50% of the deposit
Include reference to measures taken to
ensure sample representivity and the
appropriate calibration of any
measurement tools or systems used.
samples informing the geological and grade information for the resource
estimate. Diamond core is routinely sampled to geological contacts or at
nominal 1 metre intervals from ½ core over the entire length of the drill hole
producing samples with approximate weights between 3-4 kg that was
pulverised to produce a 50 g charge for fire assay.
Aspects of the determination of
mineralisation that are Material to the
RC samples are collected at 1m intervals via a cyclone and splitter system and
Public Report. In cases where ‘industry
standard’ work has been done this would
logged geologically. A 136mm RC hammer bit was used allowing a 3-4 kg
sample to be collected that was pulverised to produce a 50 g charge for fire
be relatively simple (e.g. ‘reverse assay.
circulation drilling was used to obtain 1 m
samples from which 3 kg was pulverised to

CMA Underground Mineral Resource estimate:
produce a 30 g charge for fire assay’). In The CMA Underground Mineral Resource estimate is informed by intercepts in
other cases more explanation may be 21 RC and 66 diamond core holes drilled by Amara Mining plc between 2012
required, such as where there is coarse and 2015 and in 388 diamond core holes drilled by Perseus Mining from 2017
gold that has inherent sampling problems. onward (as defined by drill holes intersecting the principal CMA lode below the
Unusual commodities or mineralisation CMA pit design). The resource estimate is informed by a total of 475 drill holes
types (e.g. submarine nodules) may for a total of 166,553.26 metres.
warrant disclosure of detailed information.
Diamond core drill holes are the primary source of geological and grade
information for the resource estimate accounting for 97% of the total metres
drilled. Diamond core is routinely sampled to geological contacts or at nominal
1 metre intervals from ½ core selectively sampled to cover observed
mineralisation intervals producing samples with approximate weights
between 3-4 kg that was pulverised to produce a 50 g charge for fire assay.
RC samples are collected at 1m intervals via a cyclone and splitter system and
logged geologically. A 136 mm RC hammer bit was used allowing a 3-4 kg
sample to be collected that was pulverised to produce a 50 g charge for fire
assay.
Drilling Drill type (e.g. core, reverse circulation, RC drilling used face-sampling hammers with 136 mm hole diameter. Samples
techniques open-hole hammer, rotary air blast, auger,
were collected at one metre intervals and logged visually for recovery, sample
Bangka, sonic, etc.) and details (e.g. core condition (dry, damp, wet) and contamination. Sample recoveries were
diameter, triple or standard tube, depth of measured by weighing bulk recovered samples. RC samples from pre-collars
diamond tails, face-sampling bit or other where mineralisation was not expected were normally composited to 4 m
type, whether core is oriented and if so, by intervals for assaying.
what method, etc.). Diamond drilling utilised HQ triple-tube (61.1 mm Ø) drilling in weathered
materials and NQ2 (50.6 mm Ø) or NQ (47.6 mm Ø) core in fresh rock. Core in
fresh rock was oriented using a MAGSHOT II (Wellforce) and an ORISHOT II
(Reflex) device.
Drill sample Method of recording and assessing core RC drill samples were logged visually for sample condition (dry, damp, wet) and
recovery and chip sample recoveries and results contamination. Sample recoveries were measured by weighing bulk recovered
assessed. samples. Preliminary evaluation indicates that RC sample recoveries have
Measures taken to maximise sample been satisfactory. There were no wet samples logged in the CMA UG RC pre-
collar holes.
recovery and ensure representative nature
of the samples. Diamond core recoveries were measured linearly per drill run. Core recoveries
Whether a relationship exists between average approximately 85% in weathered materials and 100% in fresh rock.
sample recovery and grade and whether There is no evident relationship between sample recovery and gold grade in
sample bias may have occurred due to either RC or core samples.
preferential loss/gain of fine/coarse
material.

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Criteria JORC Code Explanation Commentary
Logging Whether core and chip samples have been Geological logs are available for the entire lengths of all drill holes. The logging
geologically and geotechnically logged to is qualitative in nature.
a level of detail to support appropriate
Mineral Resource estimation, mining
studies and metallurgical studies.
Sieved samples of RC chips from each metre of drilling were logged for colour,
rock type, alteration type and intensity, vein quartz content, sulphide
mineralisation, weathering and oxidation. The chips are stored in plastic chip
Whether logging is qualitative or trays and the trays photographed.
quantitative in nature. Core (or costean,
channel, etc.) photography.
Diamond drill core was logged for geology, structure and geotechnical
characteristics. Geological logging included colour, lithology, weathering,
The total length and percentage of the oxidation, vein type and vein volume percentage, sulphide species and their
relevant intersections logged. estimated percentage, alteration and alteration intensity. Structural logging
included fault, fold, cleavage and joint orientation, lithological contacts and
vein orientations. Drill core was photographed prior to cutting.
Sub-sampling
If core, whether cut or sawn and whether
RC drill samples were collected over one metre intervals and manually split
techniques quarter, half or all core taken. using multi-stage riffle splitters to produce assay sub-samples averaging
and sample
preparation
If non-core, whether riffled, tube sampled,
rotary split, etc. and whether sampled wet
or dry.
around 3 kg. All RC holes have been assayed in entirety. RC samples from pre-
collars where mineralisation was not expected were normally composited to
4 m intervals for assaying.
For all sample types, the nature, quality
and appropriateness of the sample
preparation technique.
In weathered materials, diamond core was halved using spatulas or knives. In
fresh rock, core was sawn in half using a diamond blade saw, with one half sent
for assaying and the other half stored in core trays for reference. Samples were
normally taken at 1 metre intervals or shorter lengths to reflect sampling to
Quality control procedures adopted for all geological contacts. For CMA underground resource definition holes, only core
sub-sampling stages to maximise intervals with visible alteration and mineralisation plus approximately 10 m
representivity of samples. up- and down-hole were sampled. For Yaouré resource definition and other
exploration drill holes, all diamond drill core has been assayed over the entire
Measures taken to ensure that the length of the drill hole.
sampling is representative of the in-situ
material collected, including for instance Most sample preparation has been undertaken at Perseus’s Yaouré sample
results for field duplicate/second-half preparation facility operated and supervised by Perseus personnel.
sampling. Commercial laboratories have also been utilised as necessary including ALS
(Yamoussoukro), Bureau Veritas (Abidjan), Intertek (Tarkwa) and MSALAB
Whether sample sizes are appropriate to (Yamoussoukro).
the grain size of the material being
sampled. Preparation of core and RC samples followed a standard path of drying at
105 degrees C for at least 12 hours, crushing the entire sample to 85% passing
-2mm and grinding a 1.5kg split to 85% passing 75 microns. 300g pulp
subsamples were selected by multiple scoop passes.
Quality control measures adopted to confirm the representivity of samples
prepared at the Yaouré facility from RC and diamond drilling included:

Field re-splits of RC samples at an average frequency of around one
duplicate per 20 primary samples respectively.

Submission of coarse blanks at an average of around 1 blank per 20
primary samples

Use of quartz wash between every sample in crushing and pulverising
equipment

Screening of approximately 1:20 pulp samples to check grind size
Commercial laboratories employed similar, industry standard measures.
Sample preparation techniques are considered appropriate to the style of
mineralisation. Available information indicates that sample sizes are
appropriate to the grain size of the material being sampled.
Quality of The nature, quality and appropriateness of
All RC and diamond core samples up to 2023 have been assayed by 50g fire
assay data the assaying and laboratory procedures assay with AAS finish by commercial laboratories including Actlab
and used and whether the technique is (Ouagadougou), ALS (Ouagadougou), Bureau Veritas (Abidjan), Intertek
laboratory considered partial or total. (Tarkwa), MSALAB (Yamoussoukro) and SGS (Tarkwa). The fire assay technique
tests For geophysical tools, spectrometers,
handheld XRF instruments, etc., the
is considered a total extraction technique and deemed appropriate for the
style of mineralisation at the Yaouré and CMA deposits.
parameters used in determining the Starting in February 2023 gold analyses have preferentially been attained via
analysis including instrument make and the Chrysos PhotonAssay™ determination method at MSALABs in
model, reading times, calibrations factors Yamoussoukro. This technique is deemed appropriate for the style of
applied and their derivation, etc. mineralisation at the Yaouré and CMA deposits.
Nature of quality control procedures Quality control procedures include submission of coarse blanks (1:20) and
adopted (e.g. standards, blanks, certified reference standards (1:20). QAQC results are reviewed on a batch-
duplicates, external laboratory checks) and
by-batch basis. Analysis ofqualitycontrol sample assays indicate the accuracy

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Criteria JORC Code Explanation Commentary
whether acceptable levels of accuracy (i.e. and precision is generally within acceptable limits and suitable for inclusion in
lack of bias) and precision have been the open pit and underground resource estimate.
established. The available information indicates that the assaying of RC and core samples is
free from any significant biases and is of acceptable accuracy.
Verification The verification of significant intersections Numerous significant mineralised intersections have been checked against
of sampling by either independent or alternative visual alteration and sulphide mineralisation in drill chips and core.
and assaying company personnel. None of the holes in the report to which this table relates have been
The use of twinned holes. deliberately twinned.
Documentation of primary data, data Geology, structure and geotechnical logs are paper based. Sample intervals
entry procedures, data verification, data are recorded in pre-numbered sample ticket books. All logging, sample
storage (physical and electronic) protocols.
interval and survey data are manually entered to digital form on site and stored
Discuss any adjustment to assay data. in an acQuire™ relational database. Data exports are normally in the form of
csv files or via ODBC connections to tailored SQL views.
Data verification procedures include automated checks to:

prevent repetition of sample numbers

prevent overlap of from-to intervals in logging and sample interval data

ensure that total hole depths in collar, assay and geology tables match

ensure that drill collar coordinates are within the project’s geographic
limits
Down-hole survey data are examined for large deviations in dip or azimuth that
may represent erroneous data or data entry errors and corrected on a case-
by-case basis including estimates of dips and azimuths where the original data
appear to be in error.
Additional data checks include viewing drill hole traces, geological logging and
assays in plan and section views.
Location of Accuracy and quality of surveys used to Drill hole collars have been surveyed by qualified mine surveyors using
data points locate drill holes (collar and down-hole differential GPS equipment with coordinates recorded in UTM grid, WGS84
surveys), trenches, mine workings and Zone 30N datum.
other locations used in Mineral Resource
estimation. All RC and diamond core holes have been surveyed at 12m depth and at
approximately 30m down-hole increments using digital compass instruments.
Specification of the grid system used. A topographic surface has been established by a LiDAR survey conducted in
Quality and adequacy of topographic 2017. The topographic surface is reliable to +/- 0.2m.
control.
Yaouré mine elevation is calculated by adding 1,000 metres to the natural
topographic datum.
Topographic control is adequate for the current work being undertaken at
Yaouré.
Data spacing Data spacing for reporting of Exploration Yaouré open pit Mineral Resource estimate:
and Results.
distribution The Yaouré deposit is delineated by regular spaced drilling on an approximate
Whether the data spacing and distribution 25 x 25 metre grid to a depth of between 200 and 250 metres below natural
is sufficient to establish the degree of surface between 777,000 mN and 777,750 mN; and between 100 to 150
geological and grade continuity metres below natural surface between 776,500 mN and 777,000 mN. This
appropriate for the Mineral Resource and drill spacing is considered sufficient to define Indicated Mineral Resources.
Ore Reserve estimation procedure(s) and Partial coverage is achieved at an approximate 50 x 50 metre spacing to
classifications applied. approximately 300 and 350 metres below natural surface between 777,000
Whether sample compositing has been
applied.
mN and 777,750 mN; and between 150 to 250 metres below natural surface
between 776,500 mN and 777,000 mN. This drill spacing is considered
sufficient to define Inferred Mineral Resources.
Sample intervals were composited to 1m intervals prior to resource
estimation, with residual intervals down to 0.3m and up to 1.3m permitted.

CMA Underground Mineral Resource estimate:

The CMA underground lodes are delineated by regular drilling at approximately 25 to 30 metres down-dip spaced holes to between 75 and 100 metres and approximately 50 to 60 metres down-dip spacing between 100 to 185 metres below the base of the CMA open pit. The drill spacing is considered sufficient to define Indicated Mineral Resources. Drilling coverage is at greater than 50 metres up to 100 metres spacing to approximately 350 metres below

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Criteria JORC Code Explanation Commentary
the base of the CMA open pit which is considered sufficient to define Inferred
Mineral Resources.
Sample intervals were composited to 1m intervals prior to resource
estimation, with residual intervals down to 0.3m and up to 1.3m permitted.
Orientation Whether the orientation of sampling Yaouré Open Pit Mineral Resource estimate:
of data in
relation to
achieves unbiased sampling of possible
structures and the extent to which this is
Holes have generally been drilled dipping at -55 to -75 degrees toward 270
geological
structure
known, considering the deposit type. degrees (UTM grid) azimuth, approximately orthogonal to the dip and strike
of the reverse fault structures and drill intercept lengths closely approximate
If the relationship between the drilling true widths of mineralisation for the reverse fault structures. Intercepts are
orientation and the orientation of key typically oblique for the general east-west strike-slip fault structures with
mineralised structures is considered to true widths approximately 65% of the intercept length. The 2023 drilling has
have introduced a sampling bias, this been preferentially orientated where possible to intersect these structures at
should be assessed and reported if a more orthogonal angle.
material.
CMA Underground Mineral Resource estimate:
Holes have generally been drilled dipping at -55 to -75 degrees toward 270
degrees (UTM grid) azimuth, approximately orthogonal to the dip and strike of
the principal CMA lode, with drill intercept lengths closely approximate to true
widths of mineralisation. In the CMA northwest lode, drill holes prior to 2023
are mostly oblique to the lode and the effective along-strike drill spacing is 40
to 50m and mineralisation true width is approximately 65% of intercept length.
Sample The measures taken to ensure sample RC and core samples were delivered to the secure core yard compound at the
security security. Yaouré Gold Mine by Perseus personnel. RC field sample splits and samples of
half diamond core were placed in numbered bags and those bags, in turn,
placed into polywoven sacks that were closed with plastic cable ties prior to
transport to the Yaouré sample preparation facility by Perseus personnel.
Security guards were employed at drilling sites, the core yard compound and
the sample preparation facility on a 24 hour per day basis.
Results of field duplicates along with the general consistency of assay results
between neighbouring drill holes and drilling methods provide confidence in
the general reliability of the assay data.
Audits or The results of any audits or reviews of The Yaouré sample preparation facility has previously been subject to formal
reviews sampling techniques and data. audit, the last being in 2017. Standard operating procedures have not changed
materially since that audit. Sampling and assaying techniques are industry
standard.
Data reviews have included comparisons between various sampling phases
and methods which provide confidence in the general reliability of the data.
Yaouré drill hole data have been subject to several independent reviews
including:

Data verification pursuant to the estimation and reporting of
Mineral Resources in the NI43-101 Technical Report titled
“Technical Report and Mineral Resource Estimates for Amara
Mining PLC” with effective date 22 January 2014

Data verification pursuant to the estimation and reporting of
Mineral Resources in the NI43-101 Technical Report titled
“Technical Report and Mineral Resource Estimates for Amara
Mining Côte d’Ivoire SARL” with effective date 20 December 2015

Data verification pursuant to the estimation and reporting of Mineral
Resources and Mineral Reserves in the NI43-101 Technical Report
titled “Perseus Mining Limited – Technical Report, Yaouré Gold
Project, Côte d’Ivoire” with effective date 3 November 2017

The Competent Person considers that the sample preparation, security and analytical procedures adopted for the Yaouré and CMA resource drilling provide an adequate basis for estimation of Mineral Resources.

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JORC 2012 Table 1 – Section 2 Reporting of Exploration Results

(Criteria listed in the preceding section also apply to this section)

Criteria
JORC Code explanation
Commentary
Mineral
tenement and
land tenure
status
Type, reference name/number, location
and ownership including agreements or
material issues with third parties such as
joint ventures, partnerships, overriding
royalties, native title interests, historical
sites, wilderness or national park and
environmental settings.
The security of the tenure held at the time
of reporting along with any known
impediments to obtaining a licence to
operate in the area.
The Yaouré open pit and CMA underground Mineral Resources are located
within the Yaouré exploitation permit (PE50). The permit has an expiry date
of 23 April 2030. The permit is held by Perseus’s subsidiary Perseus Mining
Yaouré SA in which the government of Côte d’Ivoire holds 10% free carried
interest. Additionally, the Government of Côte d’Ivoire is entitled to a royalty
on nett revenue (revenue minus transport and refining costs) as follows:
Spot price per ounce - London PM Fix
Royalty Rate
Less than or equal to US$1,000
3%
Higher than US$1,000 and less than or equal to US$1,300
3.5%
Higher than US$1,300 and less than or equal to US$1,600
4%
Higher than US$1,600 and less than or equal to US$2,000
5%
Higher than US$2,000
6%
A further 0.5% of nett revenue is required to be paid to a local community
development fund.
The reported exploration areas have no known exploration-specific
environmental liabilities.
Exploration
done by other
parties
Acknowledgment and appraisal of
exploration by other parties.
Exploration geochemical sampling, trenching and exploration and resource
definition drilling have previously been carried out by BRGM, Cluff Gold plc
and Amara Mining plc. Drill hole data deriving from work by Cluff and Amara
are considered reliable.
Geology
Deposit type, geological setting and style
of mineralisation.
Yaouré may be described as orogenic lode-style gold mineralisation. The
Yaouré project comprises several neighbouring gold deposits, including
Yaouré and CMA, that occur near the south-eastern flank of the Bouaflé
greenstone belt in central Côte d’Ivoire. Mineralisation is hosted by
Paleoproterozoic aged metabasalts and felsic intrusive rocks of the Birimian
Supergroup. The rocks are metamorphosed to lower greenschist facies and
only locally feature penetrative deformation fabrics.
In the Yaouré deposits, gold is associated with disseminated pyrite. At CMA
deposit, mineralisation is associated with quartz-albite-carbonate veining in
reverse fault structures that dip at 25 to 35 degrees to the east and northeast.
Yaouré deposit comprises several mineralisation styles controlled by east-
dipping structures, similar to CMA, in addition to mineralisation associated
with quartz-tourmaline-chlorite-carbonate veining controlled by NE and NW
striking, sub-vertical faults and also stockwork quartz veins with associated
alteration selvages hosted by a granodiorite intrusive body.
The combined deposits extend over an area around 1.4 km east-west by 2.1
km north-south.
Drill hole
Information
A summary of all information material to
the understanding of the exploration
results including a tabulation of the
following information for all Material drill
holes:
easting and northing of the drill hole
collar
elevation or RL (Reduced Level –
elevation above sea level in metres) of
the drill hole collar
dip and azimuth of the hole
down hole length and interception depth
hole length.
If the exclusion of this information is
justified on the basis that the information
is not Material and this exclusion does not
detract from the understanding of the
report, the Competent Person should
clearly explain why this is the case.
Yaouré is an active mine and advanced exploration project. A table of drill
hole and intercept details is included in the report to which this table relates.

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Criteria JORC Code explanation Commentary
Data In reporting Exploration Results, weighting The cut-off grade, minimum down-hole length and maximum included
aggregation averaging techniques, maximum and/or internal waste are clearly stated in the report to which this table relates.
methods minimum grade truncations (e.g. cutting of Higher-grade “included” intercepts are clearly reported.
high grades) and cut-off grades are usually
Material and should be stated. Drill hole intercepts have not been reported as metal equivalents.
Where aggregate intercepts incorporate
short lengths of high-grade results and
longer lengths of low-grade results, the
procedure used for such aggregation
should be stated and some typical
examples of such aggregations should be
shown in detail.
The assumptions used for any reporting of
metal equivalent values should be clearly
stated.
Relationship These relationships are particularly Yaouré Open Pit Mineral Resource estimate:
between
mineralization
important in the reporting of Exploration
Results.
The geometry of the Yaouré deposit lodes include CMA analogous reverse
widths and
intercept
lengths
If the geometry of the mineralisation with
respect to the drill hole angle is known, its
nature should be reported.
If it is not known and only the down hole
fault structures which the dominant drilling orientation is designed to
nominally intersect at an orthogonal orientation of the mineralisation and
closely approximate true widths, except for the sub-vertical strike-slip fault
structures where drill holes are generally oblique to the lode.
lengths are reported, there should be a CMA Underground Mineral Resource estimate:
clear statement to this effect (e.g. ‘down
hole length, true width not known’). The geometry of the CMA Lode has been clearly demonstrated by previous
drilling. The lengths of drill intercepts of that structure in the report to which
this table relates closely approximate true widths except in the CMA NW lode
where drill holes are oblique to the lode.
Diagrams Appropriate maps and sections (with Collar plan of recent drilling results is included in the report to which this
scales) and tabulations of intercepts should table relates.
be included for any significant discovery
being reported These should include, but
not be limited to a plan view of drill hole
collar locations and appropriate sectional
views.
Balanced Where comprehensive reporting of all Holes that did not intercept significant mineralisation are shown on the collar
reporting Exploration Results is not practicable, plan and “NSI” holes are included in tables of intercepts.
representative reporting of both low and
high grades and/or widths should be
practiced to avoid misleading reporting of
Exploration Results.
Other Other exploration data, if meaningful and The Yaouré property has been subject to extensive exploration, including:
substantive
exploration
material, should be reported including (but
not limited to): geological observations;

Soil sampling, surface mapping
data geophysical survey results; geochemical
Approximately 380,000 metres of drilling
survey results; bulk samples – size and
method of treatment; metallurgical test
Previous mining by_Compagnie Miniere d’Afrique_(CMA) and Cluff
results; bulk density, groundwater, Mining plc
geotechnical and rock characteristics;
potential deleterious or contaminating

Airborne EM, gravity, radiometrics and magnetic surveys
substances.
2D & 3D seismic surveys.
The CMA Lode is presently being exploited by open pit mining.
Further work The nature and scale of planned further Perseus intends to continue drilling at the Yaouré Gold Mine to delineate
work (e.g. tests for lateral extensions or additional Mineral Resources and Ore Reserves and to undertake such
depth extensions or large-scale step-out further studies as are required to support a decision to develop additional
drilling). open pits at Yaouré and an underground mine to exploit the extensions of
Diagrams clearly highlighting the areas of the CMA lodes beneath the limits of open pit mining.
possible extensions, including the main
geological interpretations and future
drilling areas, provided this information is
not commercially sensitive.

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JORC 2012 Table 1 – Section 3 Estimation and Reporting of Mineral Resources

(Criteria listed in section 1, and where relevant in section 2, also apply to this section.)

Criteria JORC Code explanation Commentary
Database Measures taken to ensure that data has not
All geological data is captured and stored in a acQuire™ SQL geological
integrity been corrupted by, for example, database. The database is hosted securely through Azures cloud servers
transcription or keying errors, between its managed by Perseus personnel. User access to the database is regulated by
initial collection and its use for Mineral specific user permissions.
Resource estimation purposes. The acQuire™ database is configured for validation through parent/child
Data validation procedures used. table relationships, required fields, logical constraints and referenced library
tables. Data that fails these rules on import is rejected or quarantined until it
is corrected.
The acQuire™ database is centrally managed by a Database Manager who is
responsible for all aspects of data entry, validation, development, and quality
control & specialist queries. There is a standard suite of validation checks for
all data.
Database and geological staff routinely validate database entries with
reference to original data.
Site visits Comment on any site visits undertaken by The CP visited the Yaouré site during September 2022 and inspected
the Competent Person and the outcome of available drilling intersections and sample preparation facilities.
those visits.
Geological Confidence in (or conversely, the Yaouré Open Pit Mineral Resource estimate:
interpretation uncertainty of) the geological interpretation
of the mineral deposit.

Geological logging of lithology and alteration support the three-dimensional
interpretations of mineralised structures that form the basis of the estimate
Nature of the data used and of any of Mineral Resources. Confidence in the geological interpretation is also
assumptions made. based on geological knowledge acquired from Yaouré open pit mined
between 1999 to 2003.
The effect, if any, of alternative
interpretations on Mineral Resource The geological interpretation is considered robust & alternative
estimation. interpretations are considered not to have a material effect on the Mineral
The use of geology in guiding and
controlling Mineral Resource estimation.
Resource. As additional geological data is collated, the geological
interpretation is continually being updated.
The factors affecting continuity both of
grade and geology.
Mineralisation at Yaouré is defined by drill spacing at regular grids of
approximately 25m to 50m space coverage of the Mineral Resource defined
by the US$1,800/oz pit optimisation shell.
CMA Underground Mineral Resource estimate:
The geometry and extents of gold mineralisation in the CMA lodes have been
established with certainty by drilling at spacings ranging from 25m x 30m to
100m x 100m (along strike and down-dip).
Geological logging of lithology and alteration support the three-dimensional
interpretations of mineralised structures that form the basis of the estimate
of Mineral Resources.
The confidence in the interpretation of mineralised structures at CMA is such
that it is not considered reasonable to consider alternative interpretations.
Confidence in the geological interpretation is also based on geological
knowledge acquired from the open pit.
Geological setting and mineralisation controls have been established with
sufficient confidence for the current estimates. As additional geological data
is collated, the geological interpretation is continually being updated.
Dimensions The extent and variability of the Mineral Yaouré Open Pit Mineral Resource estimate:
Resource expressed as length (along strike
or otherwise), plan width, and depth below
surface to the upper and lower limits of the
Mineral Resource.
The Yaouré open pit Mineral Resource is currently defined to a maximum
vertical depth of approximately 400m from surface with Indicated Resources
defined to an approximate depth of 250 metres and Inferred Resources
defined to an approximate depth of 350 metres. The Mineral Resource
extends over 1,500 metres in strike length and mineralisation remains open
at depth.
CMA Underground Mineral Resource estimate:
CMA underground Mineral Resource extends from the designed base of the
CMA open pit to a maximum vertical depth of approximately 185 metres for
Indicated Resources and 350 metres for Inferred Resources. The

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Criteria JORC Code explanation Commentary
corresponding down-dip extents beneath the pit design base are
approximately 400 metres and 700 metres. The Mineral Resource extends
over 1,400 metres in strike length and mineralisation remains open along the
moderately plunging trend to the north.
Estimation The nature and appropriateness of the Yaouré Open Pit Mineral Resource estimate:
and modeling
techniques
estimation technique(s) applied and key
assumptions, including treatment of
extreme grade values, domaining,
interpolation parameters and maximum
distance of extrapolation from data points.
If a computer assisted estimation method
Mineral Resources were estimated for gold using either Ordinary Kriging (OK)
or Inverse Distance (ID) methods of 1 metre down-hole composited gold
grades from RC and diamond drilling. The geological modelling and resource
estimation was conducted using Leapfrog Geo™ software and the Edge™
module.
was chosen include a description of Discrete individual lodes (domains) were modelled using the interval
computer software and parameters used. selection tool and vein modelling function in Leapfrog Geo™. Domain
The availability of check estimates, previous
estimates and/or mine production records

intervals were selected based on geological characteristics of the
mineralisation and a nominal cut-off grade of 0.2 g/t gold.
and whether the Mineral Resource estimate
The estimation approach and estimate search strategy was chosen on an
takes appropriate account of such data. individual domain basis based on inputs criteria including the number of
The assumptions made regarding recovery
of by-products.
samples, drill hole spacing, lode (domain) orientation and variogram model
analysis. Estimates were undertaken as hard boundaries into parent blocks
with dimensions of 8.0 mE by 16.0 mE by 5.0 mRL. The block size was selected
Estimation of deleterious elements or other based on drill hole spacing, the geometry of the mineralisation and the
non-grade variables of economic selective mining unit (4.0 m x 4.0 m x 2.5 m). Parent blocks were sub-blocked
significance (e.g. sulphur for acid mine to 0.5 mE by 1.0 mN by 0.625 mRL to improve the volume definition of the
drainage characterisation). domains. Block discretisation was set to 3 x 5 x 3 nodes per block.
In the case of block model interpolation, the
Search ellipses were oriented to reflect the strike and dip directions of each
block size in relation to the average sample of the lodes and where applicable dynamic anisotropy was applied.
spacing and the search employed. Generally, two estimation search passes were applied to the estimation of
Any assumptions behind modelling of
selective mining units.
each domain. The first estimation pass had ranges generally set to the range
of the modelled semi-variogram sill or the distance of the closest spaced
drilling with a requirement to find a minimum of 8 composites and maximum
Any assumptions about correlation between
of 24 to 36 composites for a block to be estimated. First pass estimates were
variables. based on a quadrant search with a minimum number of two quadrants
required with a typical drillhole restriction of 4 to 8 composites per hole. The
Description of how the geological second estimation pass utilised a reduced level of restrictions and increased
interpretation was used to control the search distance typically double the length of the first pass to estimate
resource estimates. unassigned blocks. Top-cuts were applied based on an individual lode
Discussion of basis for using or not using (domain) basis and ranged between 10 g/t to 40 g/t gold.
grade cutting or capping. Gold grade estimates were validated statistically by comparing mean
The process of validation, the checking
process used, the comparison of model data

composited grades to mean estimated grades, by gold grade trends in
easting, northing and elevation Swath plots and by visual checks in Leapfrog.
to drill hole data, and use of reconciliation The estimation technique is considered appropriate for the mineralisation
data if available. style and as a basis for the estimation of Ore Reserves that might be
recoverable by open pit mining methods.
CMA Underground Mineral Resource estimate:
Mineral Resources were estimated for gold using either Ordinary Kriging
(OK) or Inverse Distance (ID) methods of 1 metre down-hole composited
gold grades from RC and diamond drilling. The geological modelling and
resource estimation was conducted using Leapfrog Geo™ software and the
Edge™ module.
Discrete individual lodes (domains) were modelled using the interval
selection tool and vein modelling function in Leapfrog Geo™. Domain
intervals were selected based on geological characteristics of the CMA
mineralisation and a nominal cut-off grade of 0.5 g/t gold.
The estimation approach and estimate search strategy was chosen on an
individual domain basis based on inputs criteria including the number of
samples, drill hole spacing, lode (domain) orientation and variogram model
analysis. Estimates were undertaken as hard boundaries into parent blocks
with dimensions of 10.0 mE by 12.5 mE by 5.0 mRL. The block size was
selected based on drill hole spacing, the geometry of the mineralisation.
Parent blocks were sub-blocked to 0.625 mE by 3.125 mN by 0.3125 mRL to
improve the volume definition of the domains. Block discretisation was set

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Criteria JORC Code explanation Commentary
to 3 x 5 x 3 nodes per block for all domains except the CMA northwest lode
which was set to 5 x 5 x 2 nodes per block.
Search ellipses were oriented to reflect the strike and dip directions of each
of the lodes and where applicable dynamic anisotropy was applied.
Generally, two estimation search passes were applied to the estimation of
each domain. The first estimation pass had ranges generally set to the range
of the modelled semi-variogram sill or the distance of the closest spaced
drilling with a requirement to find a minimum of 4 to 8 composites and
maximum of 24 composites for a block to be estimated. First pass estimates
were based on a quadrant search with a minimum number of two quadrants
required with a typical drillhole restriction of 4 composites per hole for the
principal CMA lodes. Other lodes/domains are estimated with no sector
search restrictions apart from maximum composites per hole of between 2
to 4 composites. The second estimation pass utilised a reduced level of
restrictions and increased search distance typically double the length of the
first pass to estimate unassigned blocks. Top-cuts were applied based on an
individual lode (domain) basis and ranged between 10 g/t to 35 g/t gold.
Gold grade estimates were validated statistically by comparing mean
composited grades to mean estimated grades, by gold grade trends in
easting, northing and elevation Swath plots and by visual checks in Leapfrog.
The estimation technique is considered appropriate for the mineralisation
style and as a basis for the estimation of Ore Reserves that might be
recoverable by underground mining methods.
Moisture Whether the tonnages are estimated on a Tonnages are estimated on a dry basis.
dry basis or with natural moisture, and the
method of determination of the moisture
content.
Cut-off The basis of the adopted cut-off grade(s) or Yaouré Open Pit Mineral Resource estimate:
parameters quality parameters applied. The block cut-off grade of 0.4 g/t for the stated Yaouré open pit Mineral
Resource estimate reflects the average break-even cut-off grade that derives
from the cost and revenue parameters estimated in the Yaouré open pit Ore
Reserve based on a gold price of US$1,800/oz.
CMA Underground Mineral Resource estimate:
The block cut-off grade of 1.5 g/t Au for the stated CMA underground Mineral
Resource estimate reflects the incremental stoping cut-off grade that derives
from cost and revenue parameters estimated in the CMA Underground
Feasibility Study and a gold price of US$1,800/oz.
Mining factors
Assumptions made regarding possible
Mineral Resource estimates are based on proposed exploitation by
or mining methods, minimum mining conventional open pit load and haul or mechanised underground mining
assumptions dimensions and internal (or, if applicable, methods and ore processing by CIL at the existing Yaouré plant.
external) mining dilution. It is always
necessary as part of the process of
determining reasonable prospects for
eventual economic extraction to consider
The estimates do not include adjustments to allow for ore loss or dilution
that might occur in either open pit or underground mining and appropriate
modifying factors should be applied for estimation of Ore Reserves.
potential mining methods, but the
assumptions made regarding mining
methods and parameters when estimating
Mineral Resources may not always be
rigorous. Where this is the case, this should
be reported with an explanation of the basis
of the mining assumptions made.
Metallurgical
factors or
assumptions
The basis for assumptions or predictions
regarding metallurgical amenability. It is
always necessary as part of the process of
determining reasonable prospects for
eventual economic extraction to consider
The Yaouré open pit Ore Reserve and CMA underground Feasibility Study
contemplates processing both Yaouré open pit and CMA underground ore
using the existing Yaouré Gold Mine CIL plant.
Yaouré Open Pit Mineral Resource estimate:
potential metallurgical methods, but the Metallurgical testwork of the Yaouré open pit mineralisation predicts gold
assumptions regarding metallurgical recoveries ranging between:
treatment processes and parameters made
when reporting Mineral Resources may not
70.1 to 98.3% for completely oxidised material
always be rigorous. Where this is the case,
this should be reported with an explanation

81.1 to 97.2% for partially oxidised material

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Criteria JORC Code explanation Commentary
of the basis of the metallurgical
89.0 to 98.5% for fresh rock
assumptions made. The average estimated gold recoveries by material and lithology types for the
Yaouré open pit are:

93.0% for completely oxidised material

93.3% for partially oxidised material

92.6% for fresh basalt and volcaniclastics

93.8% for fresh granodiorite
CMA Underground Mineral Resource estimate:
Testwork and analysis for the CMA underground Feasibility Study has
resulted in the generation of a metallurgical processing recovery formula
which represents the spatial distribution of processing recovery across the
orebody.
Gold recoveries estimated by the recovery formula range from 80.5% to
92.1%. The average estimated metallurgical processing recovery for the
CMA Underground mineralisation is 87.2%.
Environmental
Assumptions made regarding possible
Adequate testwork has been completed to indicate that waste rock from
factors or waste and process residue disposal options. open pit and underground mining is unlikely to be acid generating and is likely
assumptions It is always necessary as part of the process to have significant acid buffering capacity.
of determining reasonable prospects for
eventual economic extraction to consider
There are no known significant concentrations of deleterious elements
the potential environmental impacts of the
mining and processing operation. While at
this stage the determination of potential
associated with mineralisation at either the Yaouré or CMA deposit. Tailings
material from processing of the open pit and underground ore is expected to
be suited to disposal in the existing Yaouré tailings storage facility.
environmental impacts, particularly for a Yaouré mine operates under permits based upon an Environmental and
green fields project, may not always be well
Social Impact Assessment (ESIA) that was approved on 20 April 2018. Being
advanced, the status of early consideration an extension to existing open pit mine operations, exploitation of CMA
of these potential environmental impacts underground is expected to be covered by existing permits.
should be reported. Where these aspects
have not been considered this should be
reported with an explanation of the
environmental assumptions made.
Bulk density Whether assumed or determined. If Density measurements was assigned based on drill core measurements
assumed, the basis for the assumptions. If based on a dataset of 2,024 measurements. Density measurements were
determined, the method used, whether wet collected using the water immersion technique and calculated using
or dry, the frequency of the measurements, Archimedes’ Principle.
the nature, size and representativeness of
the samples.
Bulk densities were applied to the block model by oxidisation type and
lithology, with values of 1.80 t/m3for completely weathered material, 2.10
The bulk density for bulk material must t/m3for transitional weathered material, 2.70 t/m3for sediments in fresh
have been measured by methods that material, 2.85 t/m3for basalt in fresh material, 2.80 t/m3for intrusive
adequately account for void spaces (vugs, porphyritic dykes and 2.75 t/m3for granodiorite.
porosity, etc.), moisture and differences
between rock and alteration zones within
Tonnages are estimated on a dry basis.
the deposit.
Discuss assumptions for bulk density
estimates used in the evaluation process of
the different materials.
Classification The basis for the classification of the The Mineral Resource classifications account for all relevant factors
Mineral Resources into varying confidence (including drill hole spacing and orientation, confidence in the geological
categories. model and statistical validation of the estimate) and reflect the Competent
Whether appropriate account has been Person's views of the reliability of the estimates.
taken of all relevant factors (i.e. relative The data spacing and distribution is sufficient to establish geological and
confidence in tonnage/grade estimations, grade continuity appropriate for Mineral Resource estimation and
reliability of input data, confidence in classification and as such the results appropriately reflect the Competent
continuity of geology and metal values, Person’s view of both the Yaouré and CMA deposits.
quality, quantity and distribution of the
data).
Whether the result appropriately reflects
the Competent Person’s view of the deposit.

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Criteria JORC Code explanation Commentary
Audits or The results of any audits or reviews of The Yaouré open pit and CMA underground Mineral Resource estimates have
reviews Mineral Resource estimates. not been subject to any independent reviews.
Discussion of Where appropriate a statement of the Confidence in the relative accuracy of the Yaouré open pit and CMA
relative relative accuracy and confidence level in the
underground resource estimates is communicated through the classification
accuracy/ Mineral Resource estimate using an of estimates being assigned as either Indicated and Inferred Mineral
confidence approach or procedure deemed appropriate
Resources.
by the Competent Person. For example, the
application of statistical or geostatistical
procedures to quantify the relative accuracy

The Yaouré open pit and CMA underground Mineral Resource statements
relate to the global estimates of tonnes and grade.
of the resource within stated confidence
limits, or, if such an approach is not deemed
appropriate, a qualitative discussion of the
factors that could affect the relative
accuracy and confidence of the estimate.
The statement should specify whether it
relates to global or local estimates, and, if
local, state the relevant tonnages, which
should be relevant to technical and
economic evaluation. Documentation
should include assumptions made and the
procedures used.
These statements of relative accuracy and
confidence of the estimate should be
compared with production data, where
available.

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JORC 2012 Table 1 – Section 4 Estimation and Reporting of Ore Reserves

This section has been prepared by Perseus Mining Limited to support the Statement of Ore Reserves for the CMA Underground as of 30 June 2022

Criteria
JORC Code explanation
Commentary Commentary Commentary Commentary
Mineral
Resource
estimate for
conversion to
Ore Reserves
Description of the Mineral Resource
estimate used as a basis for the
conversion to an Ore Reserve.
Clear statement as to whether the
Mineral Resources are reported
additional to, or inclusive of, the Ore
Reserves.
The underground Mineral Resources for CMA underground and Yaouré open pit
were estimated by Mr Hans Andersen, a full-time employee of Perseus Mining
Services Pty Ltd and Competent Person for the Mineral Resource.
Mineral Resources quoted in this report are inclusive of Ore Reserves.
Site visits
Comment on any site visits
undertaken by the Competent Person
and the outcome of those visits.
If no site visits have been undertaken
indicate why this is the case.
Mr Adrian Ralph is the Competent Person for the purpose of the CMA
underground and Yaouré open pit JORC Ore Reserve and is a full-time employee of
Perseus Mining Services Pty Ltd. Adrian undertakes regular visits to the Yaouré
mine site (including the CMA and Yaouré open pits), most recently during May
2023.
Study status
The type and level of study
undertaken to enable Mineral
Resources to be converted to Ore
Reserves.
The Code requires that a study to at
least Pre-Feasibility Study level has
been undertaken to convert Mineral
Resources to Ore Reserves. Such
studies will have been carried out
and will have determined a mine plan
that is technically achievable and
economically viable, and that
material Modifying Factors have
been considered.
The Mineral Resources for CMA underground and Yaouré open pit have been
converted to Ore Reserves by means of feasibility-level studies. The CMA
underground Reserves will be combined with open pit Reserves in an updated
operational Life of Mine (LOM) plan for Yaouré Gold Mine, which will be prepared
during the September Quarter 2023. The Yaouré open pit was part of the Yaouré
Gold Mine FEED study completed during 2018. Yaouré open pit Ore Reserve
increase is an extension of the current Yaouré open pit Ore Reserves at the
operating Yaouré Gold Mine site.
CMA underground Ore Reserves and Yaouré open pit Ore Reserves are
determined from technically achievable mine designs.
The CMA underground mine design and Yaouré open pit were scheduled,and
results included in a financial model to ensure economic viability.
Material Modifying Factors (MF) were considered and applied where necessary.
Cut-off
parameters
The basis of the cut-off grade(s) or
quality parameters applied.
CMA underground cut-off grades:
A range of cut-off grades (COG) were applied to estimate the CMA underground
Ore Reserves.
The cut-off grade applied in each situation depends upon a decision to mine a given
block of material, and whether to send material to waste or include it in Ore
Reserves. Material is included in Ore Reserves if it is above the relevant cut-off
grade, taking into accountcosts incurred to mine and process that material.
Cut-off grades applied forthe CMA underground Ore Reserves are:

Incremental Development Cut-off grade: 0.5 g/t

Incremental Stoping Cut-off grade: 2.5 g/t
Yaouré open pit cut-off grades:
The Yaouré open pit cut-off grades range from 0.45 g/t to 0.75 g/t depending upon
material type, as per the table below. The major factor affecting COG is processing
throughput, which in turn affects processing and G&A unit costs.
MATERIAL TYPE
OXIDE
TRANSITION
YAOURÉ
BASALT
YAOURÉ
GRANODIORITE
Cut-off (g/t)
0.45
0.50
0.75
0.60
MATERIAL TYPE OXIDE TRANSITION YAOURÉ
BASALT
Cut-off (g/t)
0.45
0.50
0.75
Mining factors
or assumptions
The method and assumptions used as
reported in the Pre-Feasibility or
Feasibility Study to convert the
Mineral Resource to an Ore Reserve
(i.e. either by application of
appropriate factors by optimisation
or by preliminary or detailed design).
The choice, nature and
appropriateness of the selected
mining method(s) and other mining
parameters including associated
design issues such as pre-strip,
access, etc.
The CMA underground and Yaouréopen pit have been converted from Mineral
Resources to Ore Reserves through a detailed mine design.
CMA underground modifying factors and assumptions:
CMA underground is designed to be mined by a combination of (mechanised) flat
longhole open stoping and conventional longhole open stoping mining methods.
The mining method is dependent upon the dip of the orebody which ranges from
5 degrees to 20 degrees for flat longhole stoping, and up to 62 degrees for
conventional longhole stoping.
The split between the mining methods is 98% percent flat longhole open stoping
and 2% percent conventional longhole open stoping respectively on a tonnes
basis.
Backfill is not part of the CMA Ore Reserve.

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Criteria JORC Code explanation Commentary
The assumptions made regarding The mechanised mining methods selected for CMA underground are utilised in
geotechnical parameters (e.g. pit other operations, both in Australia and Internationally.
slopes, stope sizes, etc.), grade
control and pre-production drilling.
Stope dimensions for flat longhole stoping are a footwall design slope of 1:6 to
allow trafficabilityfor remote loaders. For conventional longhole stoping, the
The major assumptions made and footwall is a minimum angle of 40 degrees.
Mineral Resource model used for pit Flat longhole stopes are spaced 10 m horizontally apart (wall to wall), which limits
and stope optimisation (if the length of production drillholes to a practical and achievable length of less than
appropriate). 16 m, depending upon the forward angle of the holes and the dip of the orebody.
The mining dilution factors used. Conventional longhole stopes are nominally spaced 20m vertically apart.
The mining recovery factors used. Development ore drives are nominally 4.7m wide by 5.0m heigh, however both
drive height and width can increase to accommodate the dimensions of the
Any minimum mining widths used. orebody.
The manner in which Inferred
Mineral Resources are utilised in
Orebody minimum mining width for flat open stopes is 4.0m and 3.0m for
conventional open stopes.
mining studies and the sensitivity of Pillar dimensions are 10m by 10m in along strike and up dip of the orebody.
the outcome to their inclusion. Pillar spacing along strike allows for 40m open stopes, which equates to 81%
The infrastructure requirements of
the selected mining methods.
extraction ratio (mining recovery) due to pillars, inclusive of vent and crown
pillars.
40m stope strike extents are considered a practical distance over which to
successfully operate remote loaders to recover ore from flat open stopes.
Geotechnical assessment to confirm appropriate pillar dimensions and stope
spans have been undertaken by MineGeoTech Pty Ltd as part of the CMA
underground Feasibilitystudy.
The CMA lode within the Mineral Resource is anticipated to be visually identified
and followed when mining underground. Grade control drilling has been allowed
for in project costing to further delineate ore prior to stoping in selected areas of
the orebody.
The CMA underground Mineral Resource was converted to an Ore Reserve by the
application of appropriate Modifying Factors and costs estimated during testwork
and studies at Feasibility level.
Production stope design is created using Deswik Mineable Stope Optimiser
software, with further manual adjustments to ensure mining shapes are realistic
and achievable.
Modifying Factors are applied in the Deswik Scheduler software to generate an
Ore Reserve mine schedule which includes planned dilution, unplanned dilution
and mining recovery.
Planned mining dilution for CMA underground is estimated to be 34% of tonnes
mined.
Unplanned mining dilution for CMA underground is estimated to be 10% for
production and 5% for development (tonnes basis).
An additional general ore loss of 10% (flat stoping) and 30% (conventional stoping)
is included in the Ore Reserve Modifying Factors. For the crown pillar area, this is
increased to 50% ore loss (50% mining recovery).
The recovery factor due to pillars (extraction ratio) across the orebody is a further
81% (19% ore loss).
There are no Inferred Mineral Resources included in the CMA underground
FeasibilityOre Reserve.

Some development Ore Reserves above the COG of 0.5 g/t, but below the Mineral Resource cut-off of 1.5 g/t are not therefore a subset of the Mineral Resource. This material accounts for 5.5 kt tonnes or 200 ounces (<0.04% metal) which is included within the Ore Reserve. This incidental mineralisation is not considered material to the CMA underground Ore Reserve. Mineralised dilution within stoping shapes is a combination of Indicated, Inferred and unclassified material.

Stope optimisation for Ore Reserves was run on only Indicated Mineral Resources. There are no Inferred Mineral Resources within the CMA production shapes that drive the value of the Ore Reserves.

Open pit mining and processing infrastructure is in place at Yaouré. Only incremental infrastructure costs for the underground mine are included in the CMA underground Ore Reserve.

Additional infrastructure needed for the CMA underground operation includes additional camp rooms, contractor workshops and offices, client underground offices, surface power line extensions and primary ventilation fans.

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NEWS RELEASE | PERSEUS MINING ANNOUNCES OPEN PIT AND UNDERGROUND ORE RESERVE UPDATE AT YAOURÉ

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Criteria JORC Code explanation Commentary
Yaouré open pit modifying factors and assumptions:
For Yaouré open pit, the chosen method of mining is conventional open pit mining
utilising hydraulic excavators and trucks, mining bench heights of 10 m with 2.5m
flitches to minimise ore loss and waste rock dilution. This configuration is the
same as currently used for mining of open pits at the Yaouré Gold Mine.
The Yaouré open pit Ore Reserve is based upon a reblocked version of the Yaouré
open pit Mineral Resource model. The Ore Reserve model has been reblocked to
4.0 m x 4.0 m x 2.5 m block size, which introduces a dilution of 8% additional ore
tonnes for 11% reduction in grade and mining recovery of 96% of ounces relative
to the sub-blocked Mineral Resource model. No additional dilution or mining
recovery factors have been applied to the Yaouré open pit Ore Reserve.
An economic pit shell was defined using Whittle pit optimisation software
(“Whittle”) with inputs such as geotechnical parameters, metallurgical recovery
and mining costs at a $1,500/oz gold price.
The pit optimisation was run with revenue generated only by Measured and
Indicated Mineral Resources. No value was allocated to Inferred Mineral
Resources.
Whittle input parameters are based on Perseus Mining Limited site operating
experience and existing testwork and supporting technical studies undertaken as
part of the Yaouré Feasibility study.
The pit slope design assumptions are based on a geotechnical study by Pitt and
Sherry as part of the 2018 Yaouré feasibility (FEED) Study. Additional geotechnical
samples and testwork will be undertaken during FY24 drilling to extend the
orebody knowledge and further refine the slope design parameters.
Inter-ramp slope angles are 30 to 40 degrees inclusive of berms spaced at 10
metres vertically and berm widths of 4.5 to 7 metres.
As with other open pit mines at Yaouré, a conventional reverse circulation drilling
(RC) grade control program will be undertaken ahead of open pit mining. This has
been accounted for in mining cost estimates.
Pit ramps have been designed for a 100-tonne payload truck fleet and are set at
24 metres (dual lane) to 16 metres (single lane). Minimum mining with is 40m for
the 100-tonne class truck fleet.
Inferred Mineral Resources have not been included in the Yaouré open pit Ore
Reserve.
There are no constraints to mining within the lease area.
No property, infrastructure or environmental issues are known to exist which may
limit the extent of mining within the mining lease.
Metallurgical
factors or
assumptions
The metallurgical process proposed
and the appropriateness of that
process to the style of mineralisation.

The Yaouré processing plant uses crushing, grinding, gravity and cyanide leaching
to extract gold. The plant has a nominal nameplate capacity of 3.3Mtpa on fresh
ore. The technology used in the processing plant is well proven, and the plant has
Whether the metallurgical process is been operating successfully since November 2020.
well-tested technology or novel in The processing testwork is representative of the Ore Reserve mining area.
nature. No deleterious material has been identified for either CMA underground or
The nature, amount and Yaouré open pit.
representativeness of metallurgical CMA underground metallurgical factors and assumptions:
test work undertaken, the nature of
the metallurgical domaining applied
and the corresponding metallurgical
recovery factors applied.
Testwork and analysis for the CMA underground at feasibility level has resulted in
the generation of a metallurgical processing recovery formula which represents
the spatial distribution of processing recovery across the orebody.
The processing recovery formula has been incorporated into the mine schedule to
Any assumptions or allowances made
apply recoveries based on the spatial location of the relevant mining shape. The
for deleterious elements. range of processing recoveries estimated by the recovery formula for the CMA
The existence of any bulk sample or
pilot scale test work and the degree
underground Ore Reserve ranges from 80.5% to 92.1% on a monthly basis.
The average metallurgical processing recovery for the CMA underground Ore
to which such samples are considered
Reserves is 87.2%.
representative of the orebody as a Testwork and analysis for the CMA underground has shown that reducing the
whole. grind size from P8075μm to P8053μm yields an economic benefit. Recovery
For minerals that are defined by a
specification, has the ore reserve
estimation been based on the
assumptions for the CMA underground Ore Reserves are based upon the
additional power consumption costs associated with batch (campaign) treating
CMA underground ore in order to achieve the finer grind size of P8053μm.
appropriate mineralogy to meet the Yaouré open pit metallurgical factors and assumptions:
specifications? The process metallurgical recovery for gold is fixed by material type in each
deposit. Gold recovery rates range from 92.6% for the fresh Yaouré basalt ore to
93.8% for the Yaouré granodiorite ore. Recovery is shown in the table below.

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NEWS RELEASE | PERSEUS MINING ANNOUNCES OPEN PIT AND UNDERGROUND ORE RESERVE UPDATE AT YAOURÉ

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Criteria
JORC Code explanation
Commentary Commentary
METALLURGICAL RECOVERIES BY ORE TYPE (%)
Oxide
Transition
Fresh Basalt
Fresh
Granodiorite
DEPOSIT
Yaouré
93.0
93.3
92.6
93.8
Average annual processing throughput rate of ore is 4.0Mtpa for oxide and
transitional ore and 2.5Mtpa and 3.3Mtpa for Yaouré basalt and Yaouré
granodiorite respectively.
Environment
The status of studies of potential
environmental impacts of the mining
and processing operation. Details of
waste rock characterisation and the
consideration of potential sites,
status of design options considered
and, where applicable, the status of
approvals for process residue storage
and waste dumps should be
reported.
No environmental issues are known to exist which will prevent either open pit or
underground mining and ore processing to continue to operate. Based on testing
to date there is no risk of acid rock drainage as any potentially acid generating
material is encapsulated within acid neutralising material.
Permitted capacity for waste dumps and tailings facilities exist at Yaouré Gold Mine
to cater for the Ore Reserve additions in this report, and waste dump designs are
updated on a regular basis to accommodate future requirements.
Infrastructure
The existence of appropriate
infrastructure: availability of land for
plant development, power, water,
transportation (particularly for bulk
commodities), labour,
accommodation; or the ease with
which the infrastructure can be
provided or accessed.
Power supply is from the national grid system supplied by the Ivorian electricity
company.
Water supply is largely from groundwater extracted from dedicated boreholes and
supplemented by decant water for the processing plant.
Access to site is via public road from Yamoussoukro city.
A camp is established to accommodate non-local employees, and this will be
expanded to accommodate the underground workforce.
Workshops, offices, storage of reagents and laboratory are established at the
processing plant to support existing open pit and processing activities.
Additional contractors and client office, changeroom and workshop facilities will
be established for the CMA underground.
No new infrastructure will be required for the expanded Yaouré open pit ore
Reserves.
Costs
The derivation of, or assumptions
made, regarding projected capital
costs in the study.
The methodology used to estimate
operating costs.
Allowances made for the content of
deleterious elements.
The derivation of assumptions made
of metal or commodity price(s), for
the principal minerals and co-
products.
The source of exchange rates used in
the study.
Derivation of transportation charges.
The basis for forecasting or source of
treatment and refining charges,
penalties for failure to meet
specification, etc.
The allowances made for royalties
payable, both Government and
private.
Gold is the only metal considered in the Ore Reserves.
All costs are in USD.
A gold price of US$1,500/oz was used for mine planning.
Bullion and Refining cost of US$3.05/oz was applied based on contract.
Allowances have been made for royalties payable to the Ivorian government.
There are no private royalties applicable to the CMA underground.
CMA underground costs:
The mining costs are based on estimates provided by two mining contractors with
existing mining contracts in Francophone West Africa.
Capital costs have been provided by Perseus and its consultants as appropriate.
All other operating costs have been provided by Perseus and its consultants,
based on existing contracts or recent quotations as appropriate. All costs quoted
are pre-tax costs.
Overall mining costs for the CMA underground include US$50-60/t ore, excluding
sustaining capital of US$11-13M. Project development capital is estimated at
US$125-135M, inclusive of capitalised pre-production operating costs up until
commercial production rates of 50kt per month are achieved.
Processing and G&A costs are estimated to be US$14.76/t ore and US$7.26/t ore
respectively. All costs, metal prices and revenues are in United States Dollars (USD).
All-in Site Cost (AISC) for the CMA UG Ore Reserves are in the range US$1,000oz to
US$1,100/oz.
Yaouré open pit costs:
Mining costs for the Yaouré open pit have been extrapolated from existing mining
contracts on site for the previous Yaouré open pit Ore Reserves.
Processing costs are based on testwork and analysis of Yaouré open pit ore and
operating experience of the Yaouré Gold Mine processing facility.
G&A costs for Yaouré are based on current operations.

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Criteria JORC Code explanation Commentary
Revenue
factors
The derivation of, or assumptions
made regarding revenue factors
including head grade, metal or
commodity price(s) exchange rates,
A gold price of US$1,500/oz was used for mine planning and generating cut-off
grades for stope optimisation.
Economic modelling by Perseus is at US$1,500/oz.
transportation and treatment Bullion and Refining cost of US$3.05/oz was applied.
charges, penalties, net smelter A government royalty of 4.5% of the metal price was applied.
returns, etc.
The derivation of assumptions made
of metal or commodity price(s), for
the principal metals, minerals and co-
products.
Market
assessment
The demand, supply and stock
situation for the particular
commodity, consumption trends and
The demand for gold is considered at the gold price used.
It was considered that gold will be marketable beyond the processing life.
factors likely to affect supply and The processing forecast and mine life are based on life of mine plans.
demand into the future. The commodity is not an industrial metal.
A customer and competitor analysis
along with the identification of likely
market windows for the product.
Price and volume forecasts and the
basis for these forecasts.
For industrial minerals the customer
specification, testing and acceptance
requirements prior to a supply
contract.
Economic The inputs to the economic analysis
to produce the net present value
(NPV) in the study, the source and
confidence of these economic inputs
including estimated inflation,
discount rate, etc.
An NPV is not used to define economic viability of Ore Reserves- they are
incremental additions to the existing Yaouré Gold Mine operation, and in each
case, to existing Ore Reserves.
An updated operational Life of Mine (LOM) plan for the Yaouré Gold Mine will be
prepared by Perseus in the September Quarter 2023, inclusive of the additional
Ore Reserves contained herein.
NPV ranges and sensitivity to
variations in the significant
assumptions and inputs.
Financial results to date on a pre-tax basis and a discount rate of 10%, confirm
that the CMA underground and Yaouré open pit are economically viable on a
stand-alone basis.
Note that as the gold price changes so too will the economic limits of the
underground mine therefore the Ore Reserves. Consequently, the size of the
Project will therefore adjust to suit the revised economics.
Social The status of agreements with key
stakeholders and matters leading to
social licence to operate.
Perseus has established relevant agreements with local stakeholders for current
operations at Yaouré, and this is anticipated to continue for the CMA
underground.
Perseus has and will continue to use skilled expatriate workers and locally sourced
skilled workers.
Other To the extent relevant, the impact of
the following on the project and/or
on the estimation and classification
of the Ore Reserves:
There are currently no large-scale, mechanised underground mines in Côte
d’Ivoire, and as such there is no specific underground mining legislation. Updated
mining regulations are currently being developed, and a draft is planned to be
completed toward the end of 2023.
Any identified material naturally Recent experience of other mining companies in neighbouring West African
occurring risks. jurisdictions is lack of exiting underground regulations does not preclude the
The status of material legal
agreements and marketing
arrangements.
development of new underground projects.
Perseus will continue to engage the Ivorian government in relation to permitting
and future underground development at Yaouré, including the CMA underground.
The status of governmental
agreements and approvals critical to
the viability of the project, such as
mineral tenement status, and
It is not anticipated that permitting or legal issues will prevent the CMA
underground being developed.
The estimate of Ore Reserves for the Yaouré open pit and CMA underground are
not materially affected by any other known environmental, title, taxation, socio-
government and statutory approvals.
There must be reasonable grounds to
expect that all necessary Government



economic, marketing, political or other relevant factors other than that described
in the preceding text. It is believed that the classification of Ore Reserves as set
out in the following sections is reasonable.
approvals will be received within the
timeframes anticipated in the Pre-
_Feasibility or Feasibility study. _

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Criteria JORC Code explanation Commentary
Highlight and discuss the materiality
of any unresolved matter that is
dependent on a third party on which
extraction of the reserve is
contingent.
Classification The basis for the classification of the
Ore Reserves into varying confidence
Ore Reserves have been classified based on the underlying Mineral Resources
classifications. Indicated Mineral Resources are the basis for the CMA
categories. underground and Yaouré open pit Ore Reserves.
The Ore Reserves have been classified as Probable Ore Reserves.
Whether the result appropriately
reflects the Competent Person’s view
of the deposit.
The Ore Reserve classification is considered appropriate given the feasibility level
studies which support the Ore Reserve, based upon expert testwork and analysis
at the appropriate level of confidence.
The proportion of Probable Ore
Reserves that have been derived
from Measured Mineral Resources (if
any).
Audits or
reviews
The results of any audits or reviews
of Ore Reserve estimates.
Perseus has completed an internal technical review of the Ore Reserve estimate,
which has resulted in approval of the estimate for public release. No material
flaws were identified in the Ore Reserves.
The JORC Code provides guidelines which set out minimum standards,
recommendations,and guidelines for the Public Reporting of exploration results,
Mineral Resources and Ore Reserves. Within the JORC Code is a “Checklist of
Assessment and Reporting Criteria” (Table 1 – JORC Code). This checklist has been
used as a systematic method to undertake a review of the underlying Study used
to report in accordance with the JORC Code.
Discussion of
relative
accuracy/
confidence
Where appropriate a statement of
the relative accuracy and confidence
level in the Ore Reserve estimate
using an approach or procedure
The accuracy and confidence of the inputs are, as a minimum, of a Feasibility level.
The key factors that are likely to affect the accuracy and confidence in the Ore
Reserves are:
deemed appropriate by the
Accuracy of the underlying Resource Block Model;
Competent Person. For example, the
application of statistical or
geostatistical procedures to quantify

Changes in gold prices and sales agreements;

Changes in metallurgical recovery;
the relative accuracy of the reserve
Mining ore loss and dilution; and
within stated confidence limits, or, if
such an approach is not deemed
appropriate, a qualitative discussion

Changes to the cost base due to supply challenges or inflationary
pressures over time.
of the factors which could affect the
relative accuracy and confidence of
the estimate.
The statement should specify
whether it relates to global or local
estimates, and, if local, state the
relevant tonnages, which should be
relevant to technical and economic
evaluation. Documentation should
include assumptions made and the
procedures used.
Accuracy and confidence discussions
should extend to specific discussions
of any applied Modifying Factors that
may have a material impact on Ore
Reserve viability, or for which there
are remaining areas of uncertainty at
the current study stage.
It is recognised that this may not be
possible or appropriate in all
circumstances. These statements of
relative accuracy and confidence of
the estimate should be compared
with production data, where
available.

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