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PERSEUS MINING LIMITED Capital/Financing Update 2018

Nov 4, 2018

46513_rns_2018-11-04_29326b8f-f024-40e2-a70b-530382f6173b.pdf

Capital/Financing Update

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5 November 2018

NEWS RELEASE

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PERSEUS MINING COMPLETES SCOPING STUDY FOR POTENTIAL UNDERGROUND MINE AT YAOURÉ

KEY POINTS

  • In November 2017, Perseus completed a strongly positive Definitive Feasibility Study for an 8.5 year open pit mining operation at Yaouré;

  • A preliminary Inferred Mineral Resource has been estimated for a potential underground mining operation at Yaouré (to supplement the open pit operation) that totals 3.0 million tonnes, grading 6.2 g/t gold and containing 595,000 ounces of gold;

  • Mineral Resources for a potential underground mining operation remain open along strike and at depth; and

  • A scoping study for a potential underground mining operation indicates that:

  • Inferred Mineral Resources amenable to extraction using mechanised underground room and pillar mining methods;

  • Underground access from Yaouré’s CMA open pit combined with the selected mining method significantly reduces the capital development requirements;

  • There are no known impediments to future underground development; and

  • Further Mineral Resource drilling and technical studies are required to enable Ore Reserve definition.

Managing Director Jeff Quartermaine Comments:

“The results of the Yaouré underground mining Scoping Study announced today highlight one further avenue for Perseus to expand its already technically feasible and financially attractive, Yaouré Gold Project. When this potential is combined with the existing Mineral Resources and Ore Reserves that are scheduled to be mined using open cut mining methods, the Yaouré Gold Project, which on current estimates is expected to start producing gold from open pit operations in December 2020, should form a major portion of Perseus’s business in Côte d’Ivoire for many years to come.”

Cautionary statement: The scoping study referred to in this report is based on low-level technical and economic assessments and is insufficient to support estimation of Ore Reserves or to provide assurance of an economic development case at this stage, or to provide certainty that the conclusions of the scoping study will be realised.

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

PO Box 1578 Subiaco WA 6008 Facsimile: +61 8 6144 1799 Website: www.perseusmining.com

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1. Background

The Yaouré Gold Project (“the Project” or “Yaouré”) is located in a rural area on the southern edge of Lake Kossou, 35 km north-west of the capital Yamoussoukro and 25km east-northeast of the city of Bouaflé, in central Côte d’Ivoire, West Africa.

Perseus completed a Definitive Feasibility Study (“DFS”) covering the open pit at the Project in November 2017. The DFS highlighted the potential for underground mining of the CMA, Y3, S1 and S2 lodes. Preliminary evaluation identified that the mineralisation with the highest potential for underground mining was the CMA Lode, immediately down dip of the DFS CMA pit.

The amount of drilling completed to date in the CMA target area is sufficient for the potential underground mineralisation to be classified as an Inferred Mineral Resource. Limited geotechnical, hydrogeological, mining and metallurgical information is available from within or close to the area of interest, however there is sufficient information for a Scoping Study.

A Scoping Study was initiated during the first half of 2018 to investigate the technical and economic viability of underground mining methods for extraction of the CMA Lode and to identify the requirements to convert the potential underground target to an Indicated Mineral Resource and Ore Reserve via a subsequent Prefeasibility Study (“PFS”).

It should be noted that there is insufficient technical detail to be able to quote either an Indicated Mineral Resource or an Ore Reserve that is specific to underground mining at this point in time. Further exploration and technical studies will be required before Perseus will be able to provide any assurance of technical or economic viability for underground mining or to estimate any Ore Reserves.

2. Geological Assessment of CMA Mineralisation with Underground Mining Potential

The existing open pit resource modelling considers the use of large scale, open pit mining equipment to mine the CMA Lode, which incurs significantly more dilution than would be expected from using underground methods. The Scoping Study involved a reinterpretation of the mineralised structures both within and below the open pit to obtain a clear understanding of the distribution and continuity of high-grade mineralisation suitable for mining by underground methods.

The re-interpretation identified a series of interconnecting lodes, shown in Figure 1 . The CMA Footwall Lode (“CMA_FW”) was determined to be the most continuous structure, with the highest grade, most consistent thickness and favourable geometry to be potentially mineable using underground mining methods. The Scoping Study was therefore limited to the evaluation of the CMA_FW. There is potential for other lodes to contribute to potential underground Ore Reserves in the future.

The CMA_FW Lode can be identified over the full strike length of the open pit (~1.3km) and is mineralised below the pit in all holes drilled to date. Figure 2 shows the existing drilling generally extends 50 to 80 metres vertically (~150 to 200 metres down dip) below the bottom of the DFS CMA pit design.

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Figure 1: CMA Lode Mineralisation Polygons on Cross Section 777335mN
Existing (Backfilled) Oxide Pit
Hangingwall Lode
Linking Lodes
DFS Pit Design
Footwall Lode
US$1,800/oz
Resource pit shell
Extension of Footwall
Lode Below DFS Pit
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Figure 2: CMA Footwall Lode Drill Intercepts coloured by Gold showing the Existing DFS CMA Open Pit Design. Long Projection Looking West.

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Notes:
1. Accumulation equals gold grade in g/t multiplied by the true thickness of the lode intercept in meters.
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The CMA Footwall Lode is generally 2 to 7 metres thick and dips to the east at 25 to 30 degrees. Higher grades possibly occur in zones plunging to the north. Mineralisation is open to the north, south and down dip. Drill density is generally on a 50m x 50m spacing in the area covered by the Scoping Study.

3. Mineral Resource Estimate for CMA Footwall Lode with Underground Mining Potential

Geology

The CMA gold deposit occurs near the south-eastern flank of the Bouaflé greenstone belt in central Côte d’Ivoire. Mineralisation is hosted by Paleoproterozoic aged metabasalts of the Birimian Supergroup. The rocks are metamorphosed to lower greenschist facies and only locally feature penetrative deformation fabrics.

Gold mineralisation is associated with quartz-albite-carbonate veining in reverse fault structures that dip at 25 to 30 degrees to the east. Gold is associated with disseminated pyrite within veins and altered wall-rocks. No significant concentrations of other economic metals or deleterious elements are known to occur within the mineralisation. Arsenopyrite and molybdenite occur in trace quantities.

Drilling Techniques

The portion of CMA_FW Lode that comprises the basis of the Scoping Study has been intersected by:

  • 10 diamond core holes drilled by Cluff Gold between February and August 2012;

  • 72 diamond core holes and 18 Reverse Circulation (“RC”) holes drilled by Amara Mining plc between September 2012 and October 2014; and

  • One diamond core hole and one RC hole drilled by Perseus during 2017.

Drill hole collar locations were surveyed by qualified surveyors using total station or differential GPS equipment. Both RC and diamond core holes were down-hole surveyed at approximately 30m intervals.

Drill Coverage

The portion of CMA_FW Lode that comprises the basis of the Scoping Study is generally intersected by drill holes on a 50m x 50m down-dip spacing. A list of drill intercepts that inform the Mineral Resource estimate is provided in Appendix A .

Over the 1,000m central portion of the study area, where CMA_FW strikes north-south, intercept lengths in drill holes drilled dipping -60° toward 270° closely represent the true width of mineralisation. North of 777,560mN the lode bends to strike west north west, true widths are approximately half that of the drill hole intercept lengths and effective drill spacing is 80m to 100m along strike. Similarly, south of 776,610mN CMA_FW lode bends to strike south west, true widths of mineralisation are approximately 70% of the drill hole intercept length.

CMA_FW lode remains open along strike and at depth.

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Sampling

RC drill samples were collected at drill sites over 1m intervals and split using multi-stage riffle splitters. Subsample weights were nominally 3kg. 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 1m intervals. For most Amara and Perseus core drilling, core recoveries were measured and averaged in excess of 97% in fresh rock.

Sample Analytical Methods

The majority of sample preparation has been carried out 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 1.5kg subsample. Internal laboratory checks required at least 85% of the pulp passing -75 microns.

All drill samples from the portion of CMA_FW Lode that comprises the basis of the Scoping Study have been assayed by 50 gram Fire Assay (“FA”) technique with Atomic Absorption Spectroscopy (“AAS”) determination. Assaying has been carried out by commercial laboratories:

  • Four core holes drilled by Cluff and four core holes drilled by Amara were assayed by SGS Tarkwa (Ghana);

  • Six diamond core holes drilled by Cluff and 20 diamond core holes drilled by Amara were assayed by Intertek Laboratories (Gh) Ltd in Tarkwa, Ghana;

  • 49 diamond core holes and 18 RC holes drilled by Amara were assayed by Actlabs, Ouagadougou (Burkina Faso);

  • One diamond core hole and one RC hole drilled by Perseus were assayed by Actlabs, Ouagadougou (Burkina Faso).

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

Estimation Methodology

Polygons were digitised on 50m spaced east-west cross-sections to represent mineralisation of greater than 2g/t gold within and below the DFS CMA open pit. Mineralisation outlines were extended through areas where lower grade intercepts indicated continuity of the CMA_FW lode structure but were less than the 2g/t gold cut-off. In such areas a minimum intercept width of 2m was applied. Polygons were snapped to drill hole traces in three dimensions (“3D”). The polygons were extended to a depth of 900mRL, between 150m and 400m down-dip of the deepest drill intercepts.

The polygons were combined to form a 3D wireframe and checked for spatial integrity and closure.

Drill sample intervals with mid-points lying within the wireframe were flagged and then composited to one metre intervals with residuals down to 0.5m and up to 1.5m permitted.

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The sample grade distribution within the lode was relatively consistent; mean and median grades were similar, and the coefficient of variation was relatively low. On the basis of these observations it was considered that applying a top cut to assays prior to estimation may produce an overly conservative view of the grade of the resource.

A template block model was generated with parent block dimensions 10mE x 25mN x 10mRL. Blocks were then cut to the lode wireframe with a minimum permitted sub-block size of 2mE x 12.5mN x 2mRL to reasonably represent the lode volume.

Gold grades were estimated directly into sub-blocks by inverse-distance-squared (“ID2”) interpolation with the estimate being informed only by samples lying within the CMA_FW wireframe, i.e. the search employed hard boundaries. An ellipsoidal search with radii of 75m along strike, 75m down-dip and 10m across dip was applied for the north south striking portion of CMA_FW lode. The across-dip search radius was expanded to 20m and the ellipsoid re-oriented for the northern and southern parts of CMA_FW lode where the lode turns to strike west north west and south west, respectively.

A comparison of the volume weighted average grades of blocks to the grades of informing samples indicated no significant global bias.

A constant bulk density of 2.75 tonnes per cubic meter, based on bulk density measurements that informed the estimate of the CMA open pit fresh rock resource tonnages in the DFS, was used to calculate resource tonnages.

Figure 3 shows a long-projection view of the Mineral Resource block model.

Figure 3: CMA Footwall Lode Resource blocks coloured by gold grade in g/t. Long projection looking West.

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Resource Classification

Based on the evident spatial continuity of the CMA_FW Lode structure, nominal 50m x 50m drill spacing and maximum extrapolation distance of 75m, all parts of the Mineral Resource have been classified as Inferred.

Potential for Eventual Economic Extraction

The Scoping Study indicates that a cut-off grade of approximately 2g/t gold is likely to be applied to underground mining of CMA_FW lode. There is sufficient information concerning the metallurgical performance of CMA sulphide ore immediately above the underground resource (i.e. within the volume of the planned open pit) to justify an assumption that similar gold recoveries will be achieved by standard CIL processing of mineralisation comprising the Mineral Resource. 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 mining recoverability (after allowances for pillars) or other material that might be mined in order to access stoping areas.

Mineral Resource Estimate

Resource volumes and tonnages were calculated for blocks lying outside and below the base of the DFS pit design and below the base of weathering. Table 1 lists the estimated Resources at a range of block cut-off grades. After rounding to appropriate precision, the Mineral Resource above a 2g/t gold cut-off grade is:

3.0 million tonnes, grading 6.2 g/t gold and containing 595,000 ounces of gold.

NOTE THAT THE MINERAL RESOURCE QUOTED HEREIN IS NOT ADDITIONAL TO THE YAOURÉ OPEN PIT MINERAL RESOURCE STATED IN THE TECHNICAL REPORT TITLED “Technical Report, Yaouré Gold Project, Côte d’Ivoire” WITH EFFECTIVE DATE 3 NOVEMBER 2017.

Approximately 46% of the Mineral Resource lies between the base of the DFS pit design and the US$1,800/oz pit shell that constrains the open pit resource. The resource tonnes, grade and gold estimated by the two models within this overlap portion are not directly comparable, having been derived by two very different estimation methods each of which is suited to its specific purpose, i.e. evaluation of open pit and underground mining.

Table 1: CMA Footwall Lode Mineral Resources at various cut-off grades

Block cut-off Volume Tonnes Grade Contained Gold
**Aug/t ** Cu m **Aug/t ** oz
0 1,348,000 3,706,000 5.2 621,000
1 1,255,000 3,451,000 5.6 615,000
2 1,094,000 3,009,000 6.2 595,000
3 970,000 2,667,000 6.6 568,000
4 811,000 2,231,000 7.2 519,000
5 610,000 1,676,000 8.2 439,000
6 467,000 1,285,000 9.0 370,000
8 222,000 611,000 11.2 220,000
10 113,000 310,000 13.4 133,000

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4. Technical Assessment of CMA Mineralisation with Underground Mining Potential

The intent of this section is to assess the current status of the modifying factors that need to be considered when converting a Mineral Resource to an Ore Reserve. Specific Scoping Studies in the areas of mining, geotechnical and hydrogeology were completed to determine whether the geometry of the mineralisation, mining widths and ground conditions could economically and technically justify further drilling and more detailed evaluation of the CMA_FW underground potential to PFS level. Information on metallurgy, processing and infrastructure, available from the open pit DFS, were reviewed to determine the applicability to underground mining.

4.1 Mining Method and Layout

The CMA Footwall Lode dips at between 25˚ and 30˚ to the east, away from the open pit. The true thickness of the Lode varies from about 2m to over 7m. A mining method with development predominantly on the lode was determined to be most appropriate. All mined material will need to be drilled and blasted, and all loading out will be by mechanical methods as the shallow dip will not provide gravity assistance. A requirement of the mining method is to minimise waste dilution and to minimise surface subsidence effects.

Room and pillar or rib panel and pillar mining method was considered the most suitable mining method for extraction of the CMA_FW Lode. Mines with similar geometry have successfully implemented the selected mining method in South Africa and at the McArthur River Mine in Australia. The mining method and typical extraction sequencing is shown in Figure 4 .

Figure 4: Scoping Study Mining Method for the CMA Footwall Lode Using Room and Pillar Methods

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An initial crown pillar of 30m thickness at the base of the CMA open pit is recommended. Mining of the crown pillar will be possible at the end of the mine life in the areas away from the bottom of the CMA open pit.

Based on the assessment of the mining method, cut-off grades and the geometry of the CMA Footwall Lode, it was determined that the footprint shown in Figure 5 has the potential to be mined. Figure 5 also shows the layout of the main access drives and ventilation circuit for the mine.

Figure 5: Scoping Study CMA Footwall Lode Development Layout and Footprint of Area Under Investigation (blue shaded area)

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The underground could be accessed through three portals developed from within the CMA open pit as shown in Figure 6 . The portals would be intakes for ventilation purposes. The return air rise (“RAR”) shown in Figure 5 would be equipped with a suitably sized vent fan to complete the vent circuit.

The main access development drives will be required for the entire mine life and will form the main arteries for production, access, egress, ventilation and services.

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Figure 6: Scoping Study Mine Access to the CMA Footwall Lode from the Open Pit

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4.2 Geotechnical

Limited geotechnical information is available from the area under consideration for underground mining, with information gathered during the open pit DFS in the area of the CMA pit east wall being located within the potential underground area.

All development, including in the portal areas, is likely to be within fresh rock. The available information indicates that the ground conditions in fresh rock will be good to very good.

No significant geotechnical concerns were identified in the Scoping Study which would exclude the use of underground methods to mine the CMA_FW Lode. Support requirements for the portal areas and for all development were estimated in the Study. Stability analysis was carried out to determine stable stoping spans and extraction ratios based on development largely being on the orebody and employing a room and pillar mining method.

Rock mass conditions and design parameters will require verification during subsequent stages of the Project.

4.3 Hydrogeological

A detailed hydrological and hydrogeological assessment was completed during the open pit DFS. All the surface hydrology work completed for the open pit is relevant to the underground since the primary access points to the underground are located within the CMA pit. No additional surface water management requirements are needed for the underground operation.

The hydrogeology of the CMA area is characterised as comprising two broad aquifer types; a shallow weathered rock aquifer (which is not relevant to the underground) and a deeper fresh rock aquifer within which the underground development and stoping will occur.

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The hydrogeological testing completed during the open pit DFS indicated that the permeability of the strata in the CMA area is generally low, ranging from 1x10[-8] m/s to 7x10[-6] m/s. Specific zones of localised elevated permeability appear to exist at the volcanoclastic/basalt lithological contact zone and associated with brittle structures of which the CMA_FW Lode is one. The inter-connection within the fracture/fissure system is relatively limited, resulting in a generally low overall transmissivity for the bedrock. However, where zones of enhanced permeability are more extensive (e.g. the CMA and the volcanoclastic/basalt contact zone) and where there is more hydraulic connectivity, there is potential for the existence of higher groundwater flow zones. Inflows from these zones may initially be significant but they are likely to reduce rapidly due to limited aquifer storage, except where links to recharge sources exist.

Groundwater inflows into the underground could comprise steady state inflows of 5 to 15 litres per second (“L/s”) plus elevated, short duration inflows following initial development (10 to 15L/s). Combined inflows assuming appropriate underground water management are generally unlikely to exceed an average of 20L/s over any 24-hour period. It will be relatively straight forward to design an appropriate underground dewatering system to manage these predicted inflows. Allowances for local underground water management, transfer to the open pit and pumping to surface have been included in the Scoping Study.

A hydrogeological investigation programme for the underground will be required in subsequent stages of the Project.

4.4 Metallurgy and Processing

Metallurgical testwork from the target area is limited with a few samples taken from within the potential crown pillar area and several samples from the bottom 50m of the DFS CMA open pit as follows:

  1. 3 samples used to make up composite samples are from within the crown pillar and a further 16 samples are from within 50m of the crown pillar

  2. 5 comminution samples are taken from within 50m of the crown pillar

  3. 1 variability sample was taken from the crown pillar area and a further 10 are within 50m of the crown pillar

The testwork on samples taken close to or within the potential underground mining area show similar results to the fresh CMA samples tested from within the open pit. Therefore, the Scoping Study determined that the metallurgical properties of the potential underground CMA Footwall Lode are the same as those for the fresh open pit CMA mineralization.

The plant for processing the open pit ore is therefore considered suitable for processing of the potential underground material, with no modifications required.

The Yaouré treatment plant design incorporates the following unit process operations:

  • Primary crushing with a single toggle jaw crusher to produce a coarse crushed product;

  • A live stockpile from which ore will be reclaimed to feed the milling circuit;

  • A SABC milling circuit comprising a SAG mill in closed circuit with a pebble crusher and a ball mill in closed circuit with hydrocyclones to produce an 80% passing 75 micron grind size;

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  • Gravity concentration and removal of coarse gold from the milling circuit recirculating load and treatment of gravity concentrate by intensive cyanidation and electrowinning to recover gold to doré;

  • A leach and carbon in leach (“CIL”) circuit of one leach stage followed by six stages of leaching with carbon present for gold adsorption, providing a total of 29 hours leach time at the design leach feed density;

  • A split Anglo American Research Laboratories (“AARL”) elution circuit treating loaded carbon, electrowinning and gold smelting to produce doré; and

  • Tailings pumping to the tailings storage facility (“TSF”).

The material mined from the CMA underground can be mixed with other ore types from the open pit operations with no blending issues expected.

Confirmatory testwork for underground material will be undertaken when additional core samples are obtained from drilling.

4.5 Infrastructure

The DFS includes the infrastructure to support the open pit operation and a nominal 3.0 million tonne per annum processing plant. The size of the potential CMA Footwall underground workings can be supported by the DFS power and water supply, communications, roads, accommodation and administration infrastructure.

The underground will require connection into the site power and water supply, ventilation and underground pumping infrastructure will be needed.

Accommodation, office and workshop facilities have been allowed for the contractors and included in the capital estimate.

The infrastructure requirements for the underground will be reviewed and specific designs produced during subsequent stages of the project.

5. Ownership, Permitting and Approvals

Perseus Mining Ltd (Perseus) acquired the Project in April 2016 via a friendly takeover of Amara Mining Plc (Amara). Perseus’s interest in the Project is held via a 100 per cent owned Ivorian subsidiary company Perseus Yaouré Sarl.

Exploration permit 397 covering an area of 49.77 km² is currently in place covering the area of the potential underground mine. The exploitation license for the Yaouré Project has been applied for and it is expected to be granted in the near future, well ahead of commencement of potential underground mining.

The ESIA assessment was updated to be consistent with the Perseus Open Pit DFS and was approved by the relevant authorities on 20[th] April 2018. The incremental impacts of an underground mine should be relatively minor, requiring minimal variation and modification to the existing approval.

There are currently no underground mines in Côte d’Ivoire and so there are no regulations in place

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to cover underground mining. Mincom, the responsible entity, has requested close consultation with Perseus so that regulations can be put in place well before potential underground mining takes place at Yaouré.

Potential underground activities would fall within the overall structure of the Yaouré Project and will comply with all aspects of the health, safety, environment, community, security and external relations policies and procedures, and any legal requirements of Côte d’Ivoire.

6. Project Implementation Strategy and Requirements to Confirm Technical and Economic Viability

The first step to confirm technical and economic viability would be to determine where the optimum changeover point is from open pit to underground mining. The assessment will use information from the recently completed Stage 8 drilling program which provides additional drilling intercepts in or close to the target area above those used in the Scoping Study.

The outcomes of the assessment would determine the optimum timing of a PFS drilling program, with the shallower the changeover to underground, the earlier the drilling would need to occur.

Notwithstanding the above, to drill out and complete a technical evaluation for the whole of the current underground target area and lift the mineralisation to the Indicated Mineral Resource category (using a nominal 25m x 25m drill spacing) and Probable Ore Reserve category is estimated to cost around $15.5 million, with the costs broken down in Table 2 .

Table 2: Estimated Cost for Completion of Further Studies on the CMA Footwall Lode to Confirm Technical and Economic Viability

PFS Component US$ '000
Geological Drillingand Resource Evaluation 14,950
Geotechnical Study 150
Hydrogeological Study 45
Metallurgical Testwork 50
Miningand Infrastructure Study 355
Total Additional 15,550

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To discuss any aspect of this announcement, please contact:

Managing Director:

Jeff Quartermaine at telephone +61 8 6144 1700 or email [email protected];

General Manager BD & IR:

Andrew Grove at telephone +61 8 6144 1700 or email [email protected]

Media Relations:

Nathan Ryan at telephone +61 4 20 582 887 or email [email protected] (Melbourne)

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 Edikan Gold Mine and the Sissingué Gold Mine without any major disruption, development of a mine at Yaouré, 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 forward-looking 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 forwardlooking information, except in accordance with applicable securities laws.

Competent Person Statement:

The information in this report that relates to Mineral Resources is based on Information compiled by Mr Gary Brabham, a Competent Person who is a member of the Australian Institute of Geoscientists and a Fellow of the Australasian Institute of Mining and Metallurgy. Mr Brabham is the Group Geologist for Perseus Mining Limited and has sufficient experience, that 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 a Qualified Person as defined in NI43-101. Mr Brabham consents to the inclusion in this report of the matters based on his information in the form and context in which it appears.

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APPENDIX A: Drill intercepts that inform CMA_FW lode resource estimate

Hole ID Hole collar Hole collar Hole collar Depth Dip Azi From To Length True Au Sample Intercept centroid Intercept centroid Intercept centroid Comment
East North RL m m m m thickness **g/t ** **type ** East North RL
YDD0034 220860 777686 1235 242.66 -60 270 108.63 109.88 1.25 0.85 8.75 core 220806 777687 1140 below_crown
YDD0035 220759 777785 1229 351.19 -60 270 248 250 2 0.9 6.92 core 220630 777788 1016 below_crown
YDD0047 221025 777686 1238 325.5 -60 270 143.04 144.39 1.35 0.85 6.09 core 220952 777684 1114 below_crown
YDD0049 220925 777686 1235 263.47 -60 270 113.48 115.11 1.63 0.95 1.13 core 220869 777685 1135 below_crown
YDD0063 221120 777687 1242 372.86 -60 270 168.02 170.02 2 1.25 0.42 core 221040 777683 1094 below_crown
YDD0070 220609 777785 1223 292.69 -60 270 184.8 186.69 1.89 0.85 2.48 core 220513 777784 1064 below_crown
YDD0072 221503 776588 1298 284.71 -60 220 171 174 3 2.6 0.77 core 221449 776521 1149 below_crown
YDD0074 221691 776689 1342 405.72 -60 270 271 273 2 2 1.12 core 221563 776691 1102 below_crown
YDD0078 221561 777289 1266 573.24 -60 270 232 234 2 2 0.23 core 221441 777297 1067 crown_pillar
YDD0081 221582 777089 1305 546.3 -60 268 230.5 232.2 1.7 1.7 2.25 core 221465 777083 1106 crown_pillar
YDD0083 221334 777687 1254 502 -60 270 208 213 5 3.2 1.73 core 221219 777676 1079 below_crown
YDD0093 221073 777785 1237 489.1 -60 270 360 362 2 0.9 14.8 core 220875 777789 936 below_crown
YDD0094 221736 777488 1270 470.07 -60 270 297 300.23 3.23 3.2 3.39 core 221596 777492 1006 below_crown
YDD0095 221781 777088 1304 433.26 -60 270 311 313 2 3 7.96 core 221628 777099 1033 below_crown
YDD0096 221779 776887 1355 452.46 -60 270 328 331 3 3 1.34 core 221613 776890 1070 below_crown
YDD0100 221761 777288 1281 426.81 -60 270 295 299 4 4 9.37 core 221619 777284 1020 below_crown
YDD0101 221600 777687 1259 650.56 -60 270 288 294 6 4.75 4.50 core 221457 777694 1006 below_crown
YDD0105 221339 777785 1247 572.76 -60 262 324 326 2 1.05 1.37 core 221180 777764 964 below_crown
YDD0110 221807 777687 1267 530.5 -60 267 393.7 400.7 7 6 9.06 core 221613 777678 921 below_crown
YDD0120 221593 776689 1307 243.1 -60 270 185 187 2 2 2.48 core 221500 776683 1147 below_crown
YDD0127 221633 776589 1325 410.56 -60.4 269 220.2 224 3.8 3.8 2.05 core 221528 776588 1130 below_crown

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Hole ID Hole
collar
Depth Dip Azi From To Length True Au Sample Intercept
centroid
Hole
collar
Depth Dip Azi Comment
East North RL m m m m thickness **g/t ** East North RL m
YDD0135 221636 777489 1265 350.73 -59.3 267 240.56 244 3.44 3.4 9.16 core 221510 777488 1058 below_crown
YDD0137 221660 777289 1270 393.57 -60 268 265 267 2 2 0.65 core 221527 777282 1040 below_crown
YDD0138 221661 777389 1269 380.56 -60.4 269 249 251 2 2 2.00 core 221535 777393 1053 below_crown
YDD0139 221701 777189 1281 380.54 -60.6 269 273.9 275.3 1.4 1.4 8.29 core 221563 777195 1044 below_crown
YDD0140 221555 777589 1259 347.39 -60.6 269 245.5 248 2.5 2.45 4.59 core 221435 777588 1043 below_crown
YDD0142 221459 777588 1258 291.01 -60 270 211 219 8 5.7 7.99 core 221353 777590 1072 crown_pillar
YDD0143 221667 777089 1299 376.92 -60.6 269 259 268 9 9 2.17 core 221537 777088 1070 below_crown
YDD0144 221694 777724 1263 389.64 -60.6 269 337 340 3 2.35 3.12 core 221522 777726 972 below_crown
YDD0145 221682 776989 1311 364.46 -60.4 268 245 252 7 7 4.62 core 221563 776983 1093 below_crown
YDD0146 221677 776889 1331 395.01 -60.3 271 261 264 3 3 2.93 core 221548 776894 1103 below_crown
YDD0148 221576 777189 1276 320.36 -60.2 268 209 212 3 3 4.11 core 221471 777186 1094 crown_pillar
YDD0153 221524 777794 1254 362.15 -60 270 319 321 2 1.6 21.3 core 221364 777791 977 below_crown
YDD0196 221340 776484 1279 191.1 -59.3 269 104 106 2 1.35 0.36 core 221287 776483 1189 below_crown
YDD0200 221541 776484 1297 278.1 -60 270 188 190 2 1.75 0.53 core 221445 776482 1134 below_crown
YDD0238 221438 777633 1261 277.8 -59.6 270 209 217 8 6.5 4.37 core 221333 777628 1076 crown_pillar
YDD0241 221535 776632 1303 205.5 -59.8 268 153 156 3 3 15.3 core 221458 776630 1169 crown_pillar
YDD0246 221633 777233 1273 271.7 -59.4 271 245 250 5 5 6.23 core 221512 777241 1058 below_crown
YDD0247 221449 776486 1289 240.05 -60 270 149 152 3 3 3.09 core 221376 776483 1157 below_crown
YDD0248 221654 776834 1329 275.06 -60.1 269 234 237 3 3 8.22 core 221540 776831 1123 below_crown
YDD0252 221281 776484 1277 149.05 -60.6 272 66 68 2 1.6 26.3 core 221248 776485 1218 below_crown
YDD0259 221693 777233 1275 299.7 -59.5 275 263 268 5 5 4.26 core 221568 777247 1041 below_crown
YDD0260 221614 777333 1268 277.4 -60 270 233 237 4 4 4.83 core 221498 777340 1064 below_crown

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Hole ID Hole
collar
Depth Dip Azi From To Length True Au Sample Intercept
centroid
Hole
collar
Depth Dip Azi Comment
East North RL m m m m thickness **g/t ** East North RL m
YDD0261 221651 777531 1264 349.7 -60.5 275 261 266 5 4.75 9.90 core 221527 777530 1032 below_crown
YDD0266 221733 777333 1279 352 -58.9 270 284 288 4 4 5.74 core 221588 777334 1032 below_crown
YDD0269 221531 777533 1258 287.4 -61.4 271 224 226 2 2 4.85 core 221424 777532 1060 crown_pillar
YDD0270 221754 777233 1282 340.6 -60.5 272 286 293 7 7 6.61 core 221616 777239 1028 below_crown
YDD0271 221657 776784 1330 314 -60.2 270 229 237 8 8 6.17 core 221547 776786 1124 below_crown
YDD0276 221719 777382 1272 349.2 -59.8 267 274 278 4 4 2.77 core 221585 777376 1031 below_crown
YDD0281 221740 776984 1327 329 -60 270 282 285 3 3 1.37 core 221601 776981 1080 below_crown
YDD0284 221701 777432 1269 334.3 -59.7 269 265 269 4 4 6.54 core 221573 777433 1035 below_crown
YDD0285 221711 777133 1288 340.8 -59 273 285 287 2 2 1.57 core 221570 777146 1039 below_crown
YDD0287 221750 777033 1315 365 -60 270 288 291 3 3 0.70 core 221603 777018 1067 below_crown
YDD0292 221714 776934 1331 320 -60 270 279 286 7 7 16.1 core 221574 776934 1085 below_crown
YDD0294 221581 777433 1262 282.8 -60 270 223 225 2 2 7.54 core 221474 777437 1066 crown_pillar
YDD0299 221761 777183 1291 352.6 -60 270 295 299 4 4 4.04 core 221615 777188 1033 below_crown
YDD0342 221595 777533 1261 334.4 -60.7 271 241 246 5 4.65 6.80 core 221480 777535 1047 below_crown
YDD0343 221220 777684 1248 349.7 -60.8 272 201 203 2 1.9 0.23 core 221123 777689 1071 below_crown
YDD0349G 221531 777792 1254 440 -80 90 372 376 4 2.25 4.97 core 221606 777787 888 below_crown
YDD0350 221511 777584 1256 291.8 -60 270 226 228 2 1.9 2.50 core 221400 777582 1058 crown_pillar
YDD0354 221670 777135 1288 304.7 -56.8 272 266 268 2 2 3.04 core 221527 777138 1062 below_crown
YDD0359G 221675 777333 1273 388.9 -80 90 339 341 2 1.55 0.77 core 221736 777331 939 below_crown
YDD0360G 221660 776938 1318 350.2 -83.6 90 275 278 3 2.35 6.71 core 221694 776937 1043 below_crown
YDD0361G 221301 776485 1277 300.2 -80 90 112 116 4 1.6 2.09 core 221320 776484 1164 below_crown
YDD0362 221640 776484 1319 355.8 -59.9 273 253 257 4 3.6 11.2 core 221519 776489 1095 below_crown

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Hole ID Hole
collar
Depth Dip Azi From To Length True Au Sample Intercept
centroid
Hole
collar
Depth Dip Azi Comment
East North RL m m m m thickness **g/t ** East North RL m
YDD0364 221429 777785 1250 364.2 -59.4 277 337 340 3 1.45 1.36 core 221241 777789 970 below_crown
YDD0385 221499 777634 1255 302.3 -59.8 268 232 238 6 5.35 5.39 core 221378 777637 1054 below_crown
YDD0386 221557 777635 1258 349.6 -60.4 272 254 259 5 4.9 7.72 core 221433 777642 1034 below_crown
YDD0389 221543 777233 1269 235.5 -60.3 266 203 205 2 2 6.42 core 221445 777226 1090 crown_pillar
YDD0397 221559 777635 1258 352.7 -70.4 271 255 259 4 4 4.31 core 221475 777635 1015 below_crown
YDD0399 221593 776631 1308 241.2 -60.6 272 185 187 2 2 0.89 core 221503 776632 1144 below_crown
YDD0403 221540 777681 1257 350.1 -59.3 271 256 262 6 5.8 8.31 core 221404 777690 1037 below_crown
YDD0408 221482 777685 1254 325.7 -60.6 271 228 234 6 3.6 8.93 core 221370 777686 1052 below_crown
YDD0409 221536 776535 1298 247.8 -70.8 273 171 176 5 4.5 1.44 core 221478 776539 1134 below_crown
YDD0462 220990 777685 1236 202.88 -59.2 270 128 130 2 1.15 2.88 core 220925 777686 1125 below_crown
YDD0492 221614 776985 1309 255 -66 319 232 237 5 4.35 3.57 core 221553 777060 1095 below_crown
YDD0493 221460 776510 1295 160 -59.8 003 155 158.4 3.4 2.75 3.05 core 221465 776590 1160 below_crown
YDD0494 221370 777785 1247 255 -63.7 228 228 232 4 3.9 3.17 core 221289 777711 1045 below_crown
YDD0498 221585 776835 1317 245 -50 219 222 224.7 2.7 2.35 3.60 core 221497 776725 1144 below_crown
YDD0500 221586 777186 1276 254 -60 304 238 240 2 1.9 3.27 core 221497 777250 1064 below_crown
YDD0501 221570 777435 1262 257 -54 223 232 236.75 4.75 3.9 7.61 core 221476 777336 1071 below_crown
YDD0502 221498 777611 1255 254 -62.6 232 217 219.2 2.2 2 4.21 core 221421 777547 1062 crown_pillar
YRC0679 221630 777036 1308 282 -58 274 229 238 9 9 4.47 RC 221498 777043 1115 crown_pillar
YRC0683 221631 776984 1308 290 -59 265 232 234 2 2 0.75 RC 221498 776970 1118 crown_pillar
YRC0688 221626 777085 1299 292 -59.5 268 243 248 5 5 5.97 RC 221485 777083 1100 below_crown
YRC0692 221582 777135 1288 252 -60 269 226 229 3 3 3.11 RC 221455 777122 1100 crown_pillar
YRC0693 221632 777137 1285 294 -58.5 268 253 255 2 2 0.47 RC 221469 777115 1092 crown_pillar

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Hole ID Hole
collar
Depth Dip Azi From To Length True Au Sample Intercept
centroid
Hole
collar
Depth Dip Azi Comment
East North RL m m m m thickness **g/t ** East North RL m
YRC0704 221598 776834 1320 245 -65 275 202 206 4 4 4.54 RC 221503 776847 1140 below_crown
YRC0706 221635 777183 1280 295 -57 275 247 252 5 5 4.77 RC 221501 777205 1071 below_crown
YRC0708 221583 777232 1271 260 -63.7 271 220 228 8 8 5.67 RC 221480 777239 1072 below_crown
YRC0713 221468 776534 1295 204 -65 270 134 138 4 3.55 1.33 RC 221402 776532 1177 below_crown
YRC0714 221541 776684 1300 220 -63 270 153 158 5 5 9.00 RC 221462 776682 1167 crown_pillar
YRC0719 221642 776683 1328 270 -63.6 270 231 233 2 2 0.29 RC 221546 776683 1116 below_crown
YRC0720 221601 776783 1314 228 -64.2 270 192 195 3 3 2.73 RC 221508 776782 1145 below_crown
YRC0721 221399 776484 1281 150 -64.8 270 132 134 2 1.7 0.55 RC 221343 776488 1161 below_crown
YRC0738 221586 777482 1262 290 -60.1 270 232 235 3 3 18.0 RC 221469 777486 1060 crown_pillar
YRC0739 221609 777283 1268 300 -60.1 270 256 258 2 2 0.77 RC 221481 777287 1046 below_crown
YRC0746 221379 777683 1260 270 -58.6 270 230 232 2 1.85 0.13 RC 221248 777691 1070 below_crown
YRC0749 221498 776484 1297 260 -58.7 270 172 175 3 2.65 2.91 RC 221405 776485 1151 below_crown
YRC0750 221636 776882 1322 280 -60.5 270 233 235 2 2 0.70 RC 221515 776887 1122 below_crown
YRC0945 221439 776535 1290 135 -59.8 267 114 117 3 3 0.89 RC 221381 776530 1190 below_crown
YRC1154D 221405 777635 1270 234.5 -66.4 271 210 212 2 2 5.12 core 221313 777640 1080 crown_pillar

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APPENDIX B: JORC Table 1 for CMA_FW Inferred Resource

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
techniques
Nature and quality of sampling (e.g. cut
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
meaning of sampling.
Include reference to measures taken to
ensure sample representivity and the
appropriate calibration of any
measurement tools or systems used.
Aspects of the determination of
mineralisation that are Material to the
Public Report. In cases where ‘industry
standard’ work has been done this would
be relatively simple (e.g. ‘reverse
circulation drilling was used to obtain 1 m
samples from which 3 kg was pulverised
to produce a 30 g charge for fire assay’).
In other cases more explanation may be
required, such as where there is coarse
gold that has inherent sampling problems.
Unusual commodities or mineralisation
types (e.g. submarine nodules) may
warrant disclosure of detailed information.
Sampling data available to inform the Mineral
Resource estimate that is the basis of the Scoping
Study include:

10 diamond core holes drilled by Cluff Gold
between February and August 2012;

72 diamond core holes and 18 Reverse
Circulation (“RC”) holes drilled by Amara
Mining plc between September 2012 and
October 2014;

One diamond core hole and one RC hole
drilled by Perseus during 2017
RCdrill samples were collected at drill sites over
generally at 1 metre intervals and split using multi-
stage riffle splitters. Sample split weights were
nominally 3kg. RC drill samples were logged visually
for recovery, moisture and contamination.
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 1m intervals, but intervals
were varied down to 0.7m or up to 1.3m to fit sample
intervals to geological contacts.
Drilling
techniques
Drill type (e.g. core, reverse circulation,
open-hole hammer, rotary air blast, auger,
Bangka, sonic, etc.) and details (e.g. core
diameter, triple or standard tube, depth of
diamond tails, face-sampling bit or other
type, whether core is oriented and if so,
by what method, etc.).
All RC drilling was by face-sampling hammer,
normally with a bit diameter of 140mm.
Diamond core drilling was generally HQ diameter in
weathered rock and NQ or NQ2 diameter in fresh
rock. Amara and Perseus diamond core drilled post
2007 was oriented using digital tools.
Drill sample
recovery
Method of recording and assessing core
and chip sample recoveries and results
assessed.
Measures taken to maximise sample
recovery and ensure representative
nature of the samples.
Whether a relationship exists between
sample recovery and grade and whether
sample bias may have occurred due to
preferential loss/gain of fine/coarse
material.
Amara and Perseus RC drilling employed rigs of
adequate capacity and appropriate drilling techniques
to provide generally high recovery, dry samples for
the majority of RC drilling. For some Amara and most
Perseus
RC
drilling,
sample
recoveries
were
measured by weighing bulk recovered samples.
Estimated sample recoveries averaged 75% to 85%.
Diamond core recovery was measured by recording
of recovered core lengths for core runs. Core
recoveries averaged 97% in fresh rock materials.
Available
information
shows
no
significant
relationships between recovery and grade for RC or
diamond drilling, and no indication that sample bias
may have occurred due to preferential loss/gain of
fine/coarse material.

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Criteria JORC Code Explanation Commentary
Logging Whether core and chip samples have
been geologically and geotechnically
logged to a level of detail to support
appropriate Mineral Resource estimation,
mining studies and metallurgical studies.
Whether logging is qualitative or
quantitative in nature. Core (or costean,
channel, etc.) photography.
The total length and percentage of the
relevant intersections logged.
Geological logs are available for all drill holes that
inform the Mineral Resource estimate that is the basis
of the Scoping Study. The logging is qualitative in
nature and of sufficient detail to support the current
resource estimate.
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 trays and the trays
photographed.
Diamond drill core was logged for geology, structure
and geotechnical characteristics. Geological logging
included colour, lithology, weathering, oxidation, vein
type
and
vein
volume
percentage,
sulphide
mineralisation
and
their
estimated
percentage,
alteration and alteration intensity. Structural logging
includes fault, fold, cleavage and joint orientation,
lithological contacts and vein orientation. Half-core
samples are stored in core trays and the trays
photographed.
Sub-sampling
techniques
and sample
preparation
If core, whether cut or sawn and whether
quarter, half or all core taken.
If non-core, whether riffled, tube sampled,
rotary split, etc. and whether sampled wet
or dry.
For all sample types, the nature, quality
and appropriateness of the sample
preparation technique.
Quality control procedures adopted for all
sub-sampling stages to maximise
representivity of samples.
Measures taken to ensure that the
sampling is representative of the in situ
material collected, including for instance
results for field duplicate/second-half
sampling.
Whether sample sizes are appropriate to
the grain size of the material being
sampled.
RC drill samples were collected at drill sites over
generally one metre intervals and split using multi-
stage riffle splitters to produce assay sub-samples
averaging around 3kg.
Diamond core was generally 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 1m intervals, but
intervals were varied down to 0.7m or up to 1.3m to fit
sample intervals to geological contacts.
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. 200g sub-samples of the resultant sample
pulp were collected by multiple scoop passes and
despatched to the assay laboratory.
Quality control measures adopted to confirm the
representivity of samples from Amara and Perseus
RC and diamond drilling include the following:

Field re-splits of RC samples at an average
frequency of around one duplicate per 15
primary samples

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

Second pulps prepared from 1:20 crushed
samples (coarse duplicates)

Second samples of pulps from 1:20 samples
(pulp repeats)

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

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Criteria JORC Code Explanation Commentary

Screening of approximately 1:100 pulp
samples to check grind size
Sample
preparation
techniques
are
considered
appropriate to the style of mineralisation and the
available information indicates that the sub-sampling
and sample preparation procedures are sufficiently
reliable
for
the
current
estimates.
Available
information
indicates
that
sample
sizes
are
appropriate to the grain size of the material being
sampled.
Quality of
assay data
and laboratory
tests
The nature, quality and appropriateness
of the assaying and laboratory procedures
used and whether the technique is
considered partial or total.
For geophysical tools, spectrometers,
handheld XRF instruments, etc., the
parameters used in determining the
analysis including instrument make and
model, reading times, calibrations factors
applied and their derivation, etc.
Nature of quality control procedures
adopted (e.g. standards, blanks,
duplicates, external laboratory checks)
and whether acceptable levels of
accuracy (i.e. lack of bias) and precision
have been established.
All drill samples that inform the resource estimate that
is the basis for the Scoping Study have been assayed
by 50g fire assay with AAS determination by
commercial laboratories. The technique is considered
a total extraction technique.
Assaying has been undertaken variously by Intertek
Laboratories (Gh) Ltd, Tarkwa, SGS Tarkwa and
Actlabs, Ouagadougou. The majority of assays
informing the resource estimate derive from Actlabs.
Quality control procedures for Amara and Perseus
drilling include submission of coarse blanks (around 1
in 20), certified reference standards, pulp repeats,
coarse duplicates, and inter-laboratory checks.
The available information indicates that the assaying
is free from any significant biases and that acceptable
levels
of
accuracy
and
precision
have
been
established for the current estimates.
Verification of
sampling and
assaying
The verification of significant intersections
by either independent or alternative
company personnel.
The use of twinned holes.
Documentation of primary data, data entry
procedures, data verification, data storage
(physical and electronic) protocols.
Discuss any adjustment to assay data.
Numerous significant mineralised intersections have
been checked against visual alteration and sulphide
mineralisation in drill chips and core by Amara and
Perseus geologists.
There has been no deliberate twinning of RC holes by
diamond core within the volume of the resource that is
the basis of the Scoping Study. The univariate
statistics of gold grades in RC samples are similar to
those in diamond core samples.
Geology, structure and geotechnical logs are paper
based. Sample intervals are recorded in pre-
numbered sample ticket books. All logging, sample
interval and survey data are manually entered to
digital form on site and stored in an SQL relational
database. Data exports are normally in the form of
MS Access files.
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

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Criteria JORC Code Explanation Commentary

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.
Previous checks of the drill hole database have
included comparing database assay entries with
laboratory source files and spot check comparison of
sampling information with original field sampling
sheets.
These
checks
showed
no
significant
discrepancies in the database used for resource
estimation.
Location of
data points
Accuracy and quality of surveys used to
locate drill holes (collar and down-hole
surveys), trenches, mine workings and
other locations used in Mineral Resource
estimation.
Specification of the grid system used.
Quality and adequacy of topographic
control.
Drill hole collars have been surveyed by qualified land
and mine surveyors using, variously, total station or
differential GPS equipment and control points
established by government survey.
Amara and Perseus RC and diamond drill holes were
down-hole surveyed at generally 30 metre intervals
using digital instruments.
Topographic surface is defined by point data from a
2017 airborne LiDAR survey commissioned by
Perseus. LiDAR controls were established using
control points established by government survey and
the surface is considered accurate to +/- 10cm.
Historic surveys are available from which to form a
surface representing the final CMA pit void. The
surface representing the limits of historic mining in
Yaouré pit was derived from historic surveys and the
recent LiDAR topographic survey.
All coordinate data are in UTM grid, WGS84 Zone 30
North datum.
Topographic control is adequate for the current
estimates.
Data spacing
and
distribution
Data spacing for reporting of Exploration
Results.
Whether the data spacing and distribution
is sufficient to establish the degree of
geological and grade continuity
appropriate for the Mineral Resource and
Ore Reserve estimation procedure(s) and
classifications applied.
Whether sample compositing has been
applied.
The Mineral Resource that is the basis of the Scoping
Study is delineated by drilling at, generally, 50mN x
50m down-dip spacing. North of 777,560mN the lode
bends to strike WNW and effective along-strike drill
spacing is 80m to 100m.
Drill
intercept
spacings
and
distribution
have
established
geological
and
grade
continuity
sufficiently to permit estimation of Inferred resources
within the volume considered in the Scoping Study.
Drill sample lengths were composited to 1m intervals
prior to resource estimation, with residual intervals
down to 0.5m and up to 1.5m permitted.

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Criteria JORC Code Explanation Commentary
Orientation of
data in
relation to
geological
structure
Whether the orientation of sampling
achieves unbiased sampling of possible
structures and the extent to which this is
known, considering the deposit type.
If the relationship between the drilling
orientation and the orientation of key
mineralised structures is considered to
have introduced a sampling bias, this
should be assessed and reported if
material.
Over the 1,000m central portion of the study area,
where CMA_FW strikes north-south, intercept lengths
in holes drilled at about -60° toward 270° closely
represent the true width of mineralisation. North of
777,560mN the lode bends to strike WNW, true
widths are approximately half of intercept lengths and
effective along-strike drill spacing is 80m to 100m.
Similarly, south of 776,610mN CMA_FW lode bends
to strike SW and true widths of mineralisation are
approximately 70% of the drill hole intercept lengths.
Sample
security
The measures taken to ensure sample
security.
RC and core samples from Amara and Perseus
drilling were delivered to the core yard and on-site
sample preparation facility by company personnel. RC
field sample splits and samples of half diamond core
were placed in numbered bags and those bags, in
turn, placed in polywoven bags that were sealed with
plastic cable ties prior to transport to the on-site
sample preparation laboratory. Security guards were
employed at drilling sites and core yard on a 24 hour
per day basis. After sample preparation, 200g sachets
of sample pulps were packed in cardboard cartons
and sealed with robust adhesive tape prior to their
transport to the assay laboratory.
Sample security measures adopted for Cluff sampling
are uncertain.
Results of field duplicates and paired holes along with
the general consistency of assay results between
sampling phases and drilling methods provide
confidence in the general reliability of the resource
data.
Audits or
reviews
The results of any audits or reviews of
sampling techniques and data.
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

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Criteria JORC Code Explanation Commentary
The last review cited above included all data that
inform the resource estimate that is the basis of the
Scoping Study. In each of the reviews, the
Competent Person(s) considered that the sample
preparation,
security
and
analytical
procedures
adopted for the Yaouré drilling provided an adequate
basis for the Mineral Resource estimates.

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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.
Yaouré
Mineral
Resource
is
located
on
Exploration Permit 397 granted to Amara Mining
Côte d’Ivoire SARL (now Perseus Yaouré SARL)
by decree no. 2013-840 of 11 December 2013.
An extension of the exploration permit to 30
November 2018 was granted by order no.
0165/MIM/DGMG
of
1
December
2016.
Perseus holds 100% interest in the permit
subject to the right of the Government of Côte
d’Ivoire to take 10% carried interest at the time
of granting an exploration permit. Additionally,
the Government of Côte d’Ivoire is entitled to a
royalty on production as follows:
Spot price per ounce - London
PM Fix
Royalty
Rate
Less than or equal to US$1000
3%
Higher than US$1000 and less
than or equal to US$1300
3.5%
Higher than US$1300 and less
than or equal to US$1600
4%
Higher than US$1600 and less
than or equal to US$2000
5%
Higher than US$2000
6%
A further 0.5% of revenue is required to be paid
to a local community development fund.
The Mineral Resource area is not affected sites
of historical or environmental significance. A
number of culturally significant sites in the
surrounding area (cemeteries, sacred groves)
and the proximity of Angovia village must be
considered in future mine development but are
not expected to be significant impediments.
An
Environmental
and
Social
Impact
Assessment, forming part of the Mining Permit
application process, was submitted on 28 July
2015.
Perseus has applied for an exploitation permit
over the entire area of Exploration Permit 397.
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 and Amara. Drill hole data deriving from
work by Cluff and Amara are considered reliable.
Geology _Deposit type, geological setting and style of _ Yaourémay be described as orogeniclode-style

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Criteria JORC Code explanation Commentary
mineralisation. gold
mineralisation.
The
Yaouré
project
comprises two adjacent deposits, Yaouré and
CMA, that occur near the south-eastern flank of
the Bouaflé greenstone belt in central Côte
d’Ivoire.
Mineralisation
is
hosted
by
Palaeoproterozoic 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 both 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. 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.
Individual exploration results are not reported in
this announcement.
Data
aggregation
methods
In reporting Exploration Results, weighting
averaging techniques, maximum and/or
minimum grade truncations (e.g. cutting of high
grades) and cut-off grades are usually Material
and should be stated.
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
Individual exploration results are not reported in
this announcement.

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Criteria JORC Code explanation Commentary
stated.
Relationship
between
mineralization
widths and
intercept
lengths
These relationships are particularly important in
the reporting of Exploration Results.
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
lengths are reported, there should be a clear
statement to this effect (e.g. ‘down hole length,
_true width not known’). _
Individual exploration results are not reported in
this announcement.
Diagrams Appropriate maps and sections (with scales)
and tabulations of intercepts should 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. _
Location plans and example cross-sections and
long-projections are included in the Mineral
Resource technical documentation.
Balanced
reporting
Where comprehensive reporting of all
Exploration Results is not practicable,
representative reporting of both low and high
grades and/or widths should be practiced to
avoid misleading reporting of Exploration
Results.
Individual exploration results are not being
reported.
Other
substantive
exploration
data
Other exploration data, if meaningful and
material, should be reported including (but not
limited to): geological observations;
geophysical survey results; geochemical survey
results; bulk samples – size and method of
treatment; metallurgical test results; bulk
density, groundwater, geotechnical and rock
characteristics; potential deleterious or
_contaminating substances. _
Individual exploration results are not being
reported.
Further work The nature and scale of planned further work
(e.g. tests for lateral extensions or depth
extensions or large-scale step-out drilling).
Diagrams clearly highlighting the areas of
possible extensions, including the main
geological interpretations and future drilling
areas, provided this information is not
commercially sensitive.
The Mineral Resource estimate disclosed herein
is the basis of a Scoping Study that examines
the potential to exploit the CMA Footwall Lode
using underground mining techniques. That
study concludes that underground mining is
likely to be viable and that further resource
definition drilling, metallurgical test work and
geotechnical and mining studies be undertaken.

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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
integrity
Measures taken to ensure that data has not
been corrupted by, for example, transcription or
keying errors, between its initial collection and
its use for Mineral Resource estimation
purposes.
Data validation procedures used.
Database and geological staff routinely validate
database entries with reference to original data.
The Competent Person’s checks of database
validity included comparison of assay values
between nearby holes, checking for internal
consistency between, and within database
tables, and comparisons between assay results
from different sampling phases. Additional
checking included comparing database assay
entries with laboratory source files and spot
check comparisons of original field sampling
sheets and down-hole survey records with
database entries. These checks showed no
significant discrepancies in the database used
for resource estimation.
Site visits Comment on any site visits undertaken by the
Competent Person and the outcome of those
visits.
Mr Brabham has visited Yaouré site on eight
occasions, the first being in April 2016 and the
most recent in July 2018. The site visits have
included inspection of drilling and sampling
activities, drill core and pit exposures, and
discussions of details of the project’s geology
and drilling and sampling with field geologists.
Mr Brabham has a thorough understanding of
the
geological
setting
and
mineralisation
controls, and the resource sampling activities.
Geological
interpretation
Confidence in (or conversely, the uncertainty
of) the geological interpretation of the mineral
deposit.
Nature of the data used and of any
assumptions made.
The effect, if any, of alternative interpretations
on Mineral Resource estimation.
The use of geology in guiding and controlling
Mineral Resource estimation.
The factors affecting continuity both of grade
and geology.
At CMA deposit, gold is associated with
disseminated pyrite and quartz-albite-carbonate
veining in reverse fault structures that dip at 25
to 35 degrees to the east.
Logging of alteration and mineralisation were
considered in conjunction with gold grades to
delineate CMA mineralised lodes.
Geological setting and mineralisation controls
have been established with sufficient confidence
for the current estimates. The geometry of gold
mineralisation in CMA deposit is relatively
straightforward. Alternate interpretations were
not considered necessary due to the high level
of confidence in current interpretations.
Dimensions The extent and variability of the Mineral
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 mineral resource that is the basis of the
Scoping Study extends over approximately
1,500m along strike and a maximum vertical
extent of 250m, equivalent to a down-dip extent
of
approximately
400m.
It
comprises
mineralisation below the base of the 2017 DFS
pit design and, outside of the pit limits, a surface
representing the top of fresh rock. The depth
and strike extents of the resource model are
limited by drill coverage, with estimates being
extrapolated a maximum of 75m beyond drill
intercepts.

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Criteria JORC Code explanation Commentary
Estimation
and modeling
techniques
The nature and appropriateness of the
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 was chosen include
a description of computer software and
parameters used.
The availability of check estimates, previous
estimates and/or mine production records and
whether the Mineral Resource estimate takes
appropriate account of such data.
The assumptions made regarding recovery of
by-products.
Estimation of deleterious elements or other
non-grade variables of economic significance
(e.g. sulphur for acid mine drainage
characterisation).
In the case of block model interpolation, the
block size in relation to the average sample
spacing and the search employed.
Any assumptions behind modelling of selective
mining units.
Any assumptions about correlation between
variables.
Description of how the geological interpretation
was used to control the resource estimates.
Discussion of basis for using or not using grade
cutting or capping.
The process of validation, the checking process
used, the comparison of model data to drill hole
data, and use of reconciliation data if available
Polygons were digitised on 50m spaced east-
west cross-sections to represent mineralisation
of greater than 2g/t gold within and below the
DFS open pit. Mineralisation outlines were
extended through areas where lower grade
intercepts indicate continuity of the CMA_FW
lode structure. In such areas a minimum
intercept length of 2m was applied. Polygon
vertices were snapped to drill hole traces in
three dimensions. The polygons were extended
to 900mRL, between 140m and 400m down-dip
of the deepest drill intercepts.
The polygons were combined to form a 3D
wireframe and the wireframe checked for spatial
integrity and closure.
Drill sample intervals with mid-points lying within
the wireframe were flagged and then composited
to 1m intervals with residuals down to 0.5m and
up to 1.5m permitted.
A template block model was generated with
parent block dimensions of 10mE x 25mN x
10mRL. Blocks were then cut to the lode
wireframe with a minimum permitted sub-block
size of 2mE x 12.5mN x 2mRL to reasonably
represent the lode volume.
Gold grades were estimated directly into sub-
blocks
by
inverse-distance-squared
(“ID2”)
interpolation with estimates being informed only
by samples lying within the CMA_FW wireframe,
i.e. the search employed hard boundaries. An
ellipsoidal search with radii of 75m along strike,
75m down-dip and 10m across dip was applied
for the north-south striking portion of the lode.
The across-dip search radius was expanded to
20m and the ellipsoid re-oriented for the
northern and southern parts of CMA_FW lode
where the lode turns to strike WNW and SW,
respectively.
The Mineral Resource that is the basis of the
Scoping Study is delineated by drilling at,
generally, 50mN x 50m down-dip spacing. North
of 777,560mN the lode bends to strike WNW
and effective along-strike drill spacing is 80m to
100m.
Top cutting was not applied to gold grades prior
to estimation. The mean and median gold
grades of the 364 sample composites that lie
below the surface that constrains the upper limit
of the resource are similar (5.30g/t and 3.09g/t
respectively) and their coefficient of variation is
1.24.
Micromine
software
was
used
for
data
compilation, wire-framing, compositing and block
grade interpolation.
The block model was checked visuallyin 3D for

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Criteria JORC Code explanation Commentary
spatial integrity and the locations of estimates
relative to informing sample data. A comparison
of the weighted average grades of blocks to the
grades of informing samples indicated no
significant global bias.
The estimation technique is appropriate for the
mineralisation style
Moisture Whether the tonnages are estimated on a dry
basis or with natural moisture, and the method
of determination of the moisture content.
Tonnages are estimated on a dry basis, with
densities estimated from oven dried samples of
diamond core.
Cut-off
parameters
The basis of the adopted cut-off grade(s) or
quality parameters applied.
The cut-off grade of 2g/t Au selected for the
stated underground Mineral Resource estimates
reflects the approximate break-even cut-off
grade that derives from stoping costs applied in
the Scoping Study and a gold price of
US$1,200/ounce.
Mining factors
or
assumptions
Assumptions made regarding possible mining
methods, minimum mining dimensions and
internal (or, if applicable, external) mining
dilution. It is always necessary as part of the
process of determining reasonable prospects
for eventual economic extraction to consider
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.
Mineral Resource estimates are based on
proposed
exploitation
by
room-and-pillar
underground mining of material above 2g/t cut-
off grade. No mining dilution or recovery factors
have been applied to estimates of Mineral
Resources.
The potential impacts of groundwater and
geotechnical conditions have been considered in
the Scoping Study and neither are expected to
prevent extraction of the resource.
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 potential metallurgical
methods, but the assumptions regarding
metallurgical treatment processes and
parameters made when reporting Mineral
Resources may not always be rigorous. Where
this is the case, this should be reported with an
explanation of the basis of the metallurgical
assumptions made.
Metallurgical test work from the target area is
limited with a limited number of samples taken
from within the potential crown pillar area and
several samples from the bottom 50m of the
DFS open pit as follows:

Three samples used to make up
composite samples are from within the
crown pillar and a further 16 samples
are from within 50m of the crown pillar

Five comminution samples are taken
from within 50m of the crown pillar

One variability sample was taken from
the crown pillar area and a further 10
are within 50m of the crown pillar
The test work on samples taken close to the
potential underground mining area indicate that
gold is cyanide soluble. Gold recoveries are
relatively grind sensitive. At a P80 of 75um, CIL
gold recoveries are predicted to average 88-90%
in fresh ores.
Environmental
factors or
Assumptions made regarding possible waste
andprocess residue disposal options. It is
There are no significant concentrations of
deleterious
elements
associated
with

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Criteria JORC Code explanation Commentary
assumptions always necessary as part of the process of
determining reasonable prospects for eventual
economic extraction to consider the potential
environmental impacts of the mining and
processing operation. While at this stage the
determination of potential environmental
impacts, particularly for a green fields project,
may not always be well advanced, the status of
early consideration of these potential
environmental impacts should be reported.
Where these aspects have not been
considered this should be reported with an
explanation of the environmental assumptions
made.
mineralisation at Yaouré. Testing of tailings
material from metallurgical test work indicates
that tailings are benign and suited to disposal in
an industry standard tailings storage facility.
An environmental and social impact assessment
has
been
undertaken
and
environmental
baseline monitoring of the site continues.
Bulk density Whether assumed or determined. If assumed,
the basis for the assumptions. If determined,
the method used, whether wet or dry, the
frequency of the measurements, the nature,
size and representativeness of the samples.
The bulk density for bulk material must have
been measured by methods that adequately
account for void spaces (vugs, porosity, etc.),
moisture and differences between rock and
alteration zones within the deposit.
Discuss assumptions for bulk density estimates
used in the evaluation process of the different
materials.
A uniform density of 2.75 t/cu m was applied to
estimate resource tonnages, the same as has
been previously applied to estimate CMA open
pit resources in fresh rock. The average density
of CMA mineralisation derives from more than
1,500 measurements of oven dried core
samples using the water displacement method.
Classification The basis for the classification of the Mineral
Resources into varying confidence categories.
Whether appropriate account has been taken of
all relevant factors (i.e. relative confidence in
tonnage/grade estimations, reliability of input
data, confidence in continuity of geology and
metal values, quality, quantity and distribution
of the data).
Whether the result appropriately reflects the
Competent Person’s view of the deposit.
The Mineral Resource that is the basis of the
Scoping Study has been classified as an
Inferred resource based on the reliability of
informing data, the spatial distribution of those
data,
the
confidence
in
the
geological
interpretation and the purpose to which the
estimate is being applied.
The
resource
classification
reflects
the
Competent Person's view of the deposit.
Audits or
reviews
The results of any audits or reviews of Mineral
Resource estimates.
The resource estimate has not been reviewed or
audited by any other party.
Discussion of
relative
accuracy/
confidence
Where appropriate a statement of the relative
accuracy and confidence level in the Mineral
Resource estimate using an approach or
procedure deemed appropriate by the
Competent Person. For example, the
application of statistical or geostatistical
procedures to quantify the relative accuracy 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
Confidence in the relative accuracy of the model
estimates is reflected by the classification of
estimates as Inferred.
There are no previous estimates of Mineral
Resources directly comparable to the estimate
reported herein.

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Criteria JORC Code explanation Commentary
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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