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LODE RESOURCES LTD Capital/Financing Update 2026

Apr 13, 2026

65220_rns_2026-04-13_20876499-1bf2-4a4e-a61c-999145418a34.pdf

Capital/Financing Update

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ASX Announcement | 14 April 2026 ASX Code: LDR

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MAIDEN RESOURCE ESTABLISHES HIGH-GRADE SILVER–ANTIMONY SYSTEM WITH CLEAR PATHWAY TO SCALE AT MONTEZUMA

Lode Resources Ltd (‘Lode’ or ‘Company’) (ASX: LDR) is pleased to announce a Maiden JORC (2012) Mineral Resource Estimate (MRE) at its 100%-owned Montezuma Silver & Antimony Project, located in Tasmania’s highly prospective West Coast Mining Provence, confirming a high-grade, structurally controlled mineral system with significant upside for resource growth and development[2] .

Highlights

  • Montezuma Maiden JORC (2012) MRE confirms high-grade silver-antimony system:

  • 480kt at 533g/t AgEq[1] for 8.2Moz AgEq[1]

  • 65% of resource is classified as Indicated

  • Reported at a 200g/t AgEq[1] cut-off , highlighting the exceptional grade profile and robust underground mining potential.

  • The geological model and MRE are supported by a total of 59 diamond drill holes for a total of 8,446m including 37 resource holes drilled by Lode resources totaling 6,605m in the current program, demonstrating rapid resource growth .

  • Open along strike and down dip .

  • Metallurgical testwork delivering strong recoveries , with additional upside potential from gold and tin not yet included in AgEq[1] .

  • Key milestone enabling development studies and permitting , with resource growth drilling ongoing.

  • PFS targeted by end-2026 , supported by further metallurgical testwork, mining, hydrogeological and environmental studies underway.

  • District-scale upside emerging , with additional targets (Fahlore and Blocks East Prospects) and drilling at Fahlore planned for the June quarter .

Lode’s Managing Director Keith Mayes said:

“The Maiden Resource at Montezuma is a defining milestone for Lode, establishing a high-grade silver–antimony system with a strong foundation for growth. Importantly, 65% of the resource is already in the Indicated category, providing a solid base as we move into development studies.

What is particularly compelling is that the system remains open in all directions, with the deepest mineralised intercepts continuing to deliver good grades. This gives us confidence that Montezuma has the potential to scale meaningfully with continued drilling. The first of these extension holes testing below this resource is now completed and samples have been despatched to the lab for analysis.

With exposure to antimony as a critical mineral, strong metallurgical outcomes, and a clear pathway to a PFS by the end of 2026, we believe Montezuma is emerging as a strategically important asset with multiple avenues for value creation.”

ASX Code: LDR | ACN: 637 512 415 | www.loderesources.com A: Level 15, Governor Macquarie Tower, 1 Farrer Place Sydney NSW 2000 | P: +61 2 9199 8017 | E: [email protected]

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EXECUTIVE SUMMARY

The Montezuma deposit consists of fissure vein hosted sulphide mineralisation associated with the north-south trending Montezuma Fault and associated splay structures. The fault dips steeply east (60-70[o] ), with mineralisation currently drill defined over 300m strike length and 250m depth, remaining open in all directions. Two main lodes have been identified through diamond drilling, the Montezuma Lode and the Footwall Lode. The Footwall Lode is a splay off the Montezuma Lode trending north northwesterly and dipping steeply east. There are numerous subsidiary stockwork veins and breccia zones associated with the main sulphide lodes.

The mineralised lodes are hosted in deformed graphitic shale, turbiditic siliciclastic sandstone, quartzite and dolomitic conglomerate of the Proterozoic Concert Schist, possibly a correlate of the Oonah Formation. High sulphidation base metal-precious metal fissure veins are associated with Carboniferous granite intrusives that postdate the peak compressive deformation.

Mineralisation is complex, consisting of early-stage pyrite-arsenopyrite with associated tin and gold mineralisation. A later stage of jamesonite-tetrahedrite-laneite-galena veins and occasionally chalcopyrite crosscuts the early pyrite-arsenopyrite. Mineralized widths are narrow but high grade.

The mineralisation is amenable to narrow vein underground mining techniques. Metallurgical testwork commenced in 2020 and is ongoing. Preliminary results suggest flotation recoveries in the order of 88.4% antimony, 93.0% silver, 88.4% lead and 91.3% copper.

This Mineral Resource Estimation (MRE) is based on diamond drilling data acquired by Spero Mining (100% owned subsidiary) with minor contribution from historic exploration drill holes. Spero commenced systematic resource/exploration drilling in April 2025 with the 37 diamond holes completed to January 2026 forming the majority of the data used for this MRE. A cluster of pre-2025 short range diamond drill holes are located near the surface costean. Drilling and feasibility studies are ongoing.

The 2025 MRE is constrained by wireframed digital models of lode structures logged in diamond drill core and a minimum downhole width of approximately 1m. A nominal cutoff of 200g/t Ag Equivalent was used for stockwork mineralisation outside of the fault structures. Lateral and down dip continuity of the structures and mineralisation is consistent.

Drillhole variables Ag, Au, Cu, Pb, Sb, S, Sn and As were composited on 1m intervals. Univariate statistical analysis was completed on all domains and variables. Although Ag grades were highly skewed, no top cuts were applied to composited grades. Clustering of high-grade data around the costean/box cut is considered to have biased univariate statistics. Variogram modeling was completed on the Montezuma lode with Ag, Pb and Sb models having a low nugget effect but short range to sill of approximately 10-20m. Cu had a low nugget effect and long range to sill of approximately 40m. Anisotropy within the

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plane of the lodes was apparent with maximum continuity in the y and x direction (within the plane of the structure).

A block modeled MRE was calculated using an ordinary kriged algorithm. Bulk density measurements were completed by the Archimedes method on drill core were interpolated into the block model using an inverse distance squared algorithm.

The MRE is reported at a 200g/t Ag Equivalent allowing for recoverable resources by narrow vein underground mining. The MRE has been classified and reported in accordance with the guidelines of the 2012 edition of the JORC Code (Table 1).

Table 1. Montezuma Indicated and Inferred Mineral Resource Estimate AgEq[1] > 200g/t

Grade Grade Grade Grade Grade Grade Grade Grade
Classification Ktonnes
Ag g/t
Aug/t
Cu %
Pb %
Sb %
Sn %
AgEq g/t
Indicated Resource 310 172 0.63 0.58 1.98 1.01 0.53 621
Inferred Resource 170 173 0.57 0.7 1.35 0.31 0.31 375
TOTAL 480 173 0.61 0.62 1.75 0.76 0.45 533
Metal
Classification Ag Moz
Au koz
Cu kt
Pb kt
Sb kt
Sn kt
AgEq Moz
Indicated Resource 1.7 6.3 1.8 6.1 3.1 1.6 6.2
Inferred Resource 0.9 3.1 1.2 2.3 0.5 0.5 2.0
TOTAL 2.7 9.4 3.0 8.4 3.7 2.2 8.2

There is a high degree of confidence in the geological model which is well understood from systematic diamond drilling, surface mapping and sampling, box cut development, and previous mining operations. The deposit has been drilled on systematic 30-50m spaced sections, intersections of the main structures were within acceptable limits of the locations predicted from extrapolated modelling. There is moderate confidence in the grade estimation near close spaced drill holes. The low sample numbers and short variogram range suggest drill spacing could be optimized at 20 x 20m.

The MRE has been classified according to the 2012 edition of the JORC Code as Inferred and Indicated Resources above a 200g/t Ag Equivalent cut off. Mineral Resource within 25m of a drill hole are classified as Indicated Resource, with the remainder Inferred Resource. Inferred Resources are located on the margins down dip where drill hole spacing exceeds 40 x 40m.

There are no Measured Resources due to uncertainties in short range grade continuity.

Recommendations for follow-up work include:

  • Continued systematic diamond drilling to extend the resource

  • Local and district exploration to identify further resources supporting plant construction.

  • Scoping/Prefeasibility Study to determine the optimum path to project development.

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1 INTRODUCTION

1.1 Location, Access and Tenure

The Montezuma Silver & Antimony Project is located in the Dundas District on the West Coast of Tasmania approximately 10km east of Zeehan (Figure 1). Western Tasmania hosts many significant active and historic mines, with all local towns associated with the mining industry.

Mine Lease 2M/2023 is held by Spero Mining Pty Ltd, a subsidiary of Lode Resources. The term of the lease expired on 27[th] December 2025 and a renewal application has been submitted and is pending approval. The small 0.5Km[2] ML is adjacent to EL7/2019 and EL20/2020, both held by Spero Mining. (Figure 1).

The ML and most of the EL area are located on Crown Land available for exploration.

The deposit is situated in steep mountainous terrain on the western slope of Moore’s Pimple in the west Coast Ranges of Tasmania. Vegetation consists of temperate rainforest with the site vegetated by thick regrowth rain forest.

The deposit is accessed via an all-weather four-wheel drive exploration road off the public all-weather unsealed Dundas Road.

1.1 Previous Estimations

There have been no previous resource estimates of the Montezuma Deposit.

1.2 Mining Method

The steeply dipping, fissure vein hosted mineralisation will require mining by narrow vein underground mining techniques. Several mining methods are being investigated as part of early-stage scoping studies. A decline accessed mine with narrow sill drives and Avoca style stopping is the most likely scenario.

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Figure 1. Montezuma Ag-Sb project, 2M/2023, White Spur EL2/2020 and Montezuma EL7/2019 location.

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1.3 Processing

Flotation and leaching testwork commenced at ALS metallurgical laboratories in Burnie and CORE Resources in Brisbane in 2020.

Recent testwork includes flotation testwork by ALS Burnie Metallurgical Laboratories under the supervision of Metallurgy consultant Mr Alvin Johns in 2025 – 2026.

1.3.1 Bulk Sample Location and Preparation

A bulk sample of jamesonite-boulangerite, pyrite-arsenopyrite and host shale was prepared to simulate approximate mill feed in 2025 and submitted to ALS Burnie Metallurgy Laboratories. The approximately 100kg sample was obtained from the box cut costean located at 5,364,175N, 373,150E 610mRL on the Montezuma Lode. The sample was blended to simulate expected dilution and gangue material.

1.3.2 Sample Comminution

Prior to grinding the sample was crushed to 1.18mm, grinding time was previously determined by iterative time grinding and subsequent size analysis, until a p80 of 150 microns was achieved. The sample was ground from 1.18mm to 150 microns in a ball mill as per the Table 2.

Table 2. Sample comminution and reagent addition

Milling Milling Primary
Mill type Ball
Media type MS
Media kg 6
Solids g 1000
Water g 500
Time Min/Sec 10.5
Speed rpm 50
Lime g 1.7
EndpH pH 9.3
Endp80 µm 150

The ground material was floated, as per the flowsheet below

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----- Start of picture text -----

Feed Pb Ro RoT
C1-7
----- End of picture text -----

Reagents were added, stagewise, as per Table 2 and during the float as per Table 3. Table 3 includes air addition rates, stage times and details of concentrates removed in each stage.

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Flotation tests were well advanced at the time of reporting (Table 4 and 5). Preliminary results suggest recoveries of 88.4% antimony, 93.0% silver, 88.4% lead and 91.5% copper can be achieved Table 4 and 5.

Table 3. Flotation Reagent Addition

Stage pH Lime
g/t
3418A
g/t
MIBC
g/t
Time
min
L/min Time
min
Float
Time
Wt
%
Solids
PrimaryGrind
9.8
1705 1
Condition 9.8 20 1
Pb Ro C1
9.7
50 5 - 11 7.5 7.5 500 12
Condition 9.7 20 1
Pb Ro C2
9.7
25 5 - 11 8 15.5 550 15
Condition 9.3 20 1
Pb Ro C3
9.3
25 6 - 14 8 23.5 550 10
Condition 9 20 1
Pb Ro C4
9
25 7 - 15 6 29.5 400 10
Condition 8.8 20 1
Pb Ro C5
8.8
25 7 - 15 5.5 35 350 10
Condition 8.7 20 1
Pb Ro C6
8.7
25 8 - 15 5 40 300 11
Condition 8.6 20 1
Pb Ro C7
8.6
25 8 - 15 4 44 200 12
REAGENT TOTALS(g/t) 1705 140 199

Table 4. Test results (stage wise) for each stage of concentration C1 to C7


PRODUCTS

WT
WT
g
%

WT
WT
g
%

Cu
Dist
%
%

Cu
Dist
%
%

Pb
Dist
%
%

Pb
Dist
%
%

As
Dist
%
%

As
Dist
%
%

Fe
Dist
%
%

Fe
Dist
%
%

Sb
Dist
%
%

Sb
Dist
%
%

S
Dist
%
%

S
Dist
%
%

Sn
Dist
%
%

Sn
Dist
%
%

Au
Dist
ppm
%

Au
Dist
ppm
%

Ag
Dist
ppm
%

Ag
Dist
ppm
%
T03 Pb Ro C1 61.8 6.2 2.08 33 26.8 18 5.38 4.5 9.09 3 16 17.6 18.65 5.4 0.3 7.6 0.78 3.9 3780 43.4
Pb Ro C2 84 8.4 1.97 42.5 31.9 29.2 3.83 4.4 8.13 3.6 19.4 29 19.85 7.8 0.43 14.8 0.59 4 2133 33.3
Pb Ro C3 57.3 5.7 0.65 9.6 23.9 14.9 5.33 4.2 11.9 3.6 15.25 15.5 19.9 5.4 0.38 8.9 0.81 3.8 680 7.2
Pb Ro C4 40.6 4.1 0.28 2.9 20 8.8 6 3.3 14.15 3 12.7 9.2 20.4 3.9 0.34 5.6 0.86 2.9 483 3.6
Pb Ro C5 33.4 3.4 0.19 1.6 20.1 7.3 6.06 2.8 16.45 2.9 12.3 7.3 23.4 3.7 0.31 4.2 1.07 2.9 383 2.4
Pb Ro C6 32.7 3.3 0.13 1.1 17.45 6.2 6.66 3 19.1 3.3 10.4 6.1 25.3 3.9 0.32 4.3 1.15 3.1 320 1.9
Pb Ro C7 23.3 2.3 0.13 0.8 15.45 3.9 6.82 2.2 22.5 2.8 8.89 3.7 27.9 3.1 0.31 3 1.23 2.3 264 1.1
Pb RoTail 663.9 66.6 0.05 8.5 1.61 11.6 8.34 75.6 22.3 77.9 0.98 11.6 21.4 66.8 0.19 51.6 1.42 77 57 7
CALC 997.1 100 0.39 100 9.22 100 7.34 100 19.1 100 5.63 100 21.32 100 0.25 100 1.23 100 540 100
ASSAY HEAD 0.35 9.31 7.29 19.7 5.57 22.2 0.25 1.34 511

Table 5. Cumulative test results

CUMULATIVE
PRODUCTS
CUM
WT
Wt
%
CUM
WT
Wt
%
Cu
Cum
%
%
Cu
Cum
%
%
Pb
Cum
%
%
Pb
Cum
%
%
As
Cum
%
%
As
Cum
%
%
Fe
Cum
%
%
Fe
Cum
%
%
Sb
Cum
%
%
Sb
Cum
%
%
S
Dist
%
%
S
Dist
%
%
Sn
Dist
%
%
Sn
Dist
%
%
Au
Dist
ppm
%
Au
Dist
ppm
%
Ag
Dist
ppm
%
Ag
Dist
ppm
%
T03 Pb Ro C1 61.8 6.2 2.08 33 26.8 18 5.38 4.5 9.09 3 16 17.6 18.65 5.4 0.3 7.6 0.78 3.9 3780 43.4
Pb Ro C2 145.8 14.6 2.02 75.5 29.74 47.2 4.49 8.9 8.54 6.6 17.96 46.6 19.34 13.3 0.37 22.4 0.67 8 2831 76.6
Pb Ro C3 203.1 20.4 1.63 85.1 28.09 62.1 4.72 13.1 9.49 10.1 17.19 62.2 19.5 18.6 0.38 31.3 0.71 11.8 2225 83.9
Pb Ro C4 40.6 24.4 1.41 87.98 26.74 70.9 4.94 16.4 10.3 13.2 16.45 71.3 19.65 22.5 0.37 36.9 0.73 14.6 1934 87.5
Pb Ro C5 74.1 27.8 1.26 89.61 25.94 78.2 5.07 19.2 11 16.1 15.95 78.7 20.1 26.2 0.36 41.2 0.78 17.6 1747 89.9
Pb Ro C6 106.8 31.1 1.14 90.7 25.04 84.4 5.24 22.2 11.9 19.3 15.36 84.7 20.65 30.1 0.36 45.4 0.81 20.6 1597 91.8
Pb Ro C7 130.1 33.4 1.07 91.48 24.37 88.4 5.35 24.4 12.6 22.1 14.91 88.4 21.16 33.2 0.36 48.4 0.84 23 1503 93
FEED 997.1 100 0.39 100 9.22 100 7.34 100 19.1 100 5.63 100 21.3 100 0.25 100 1.23 100 540 100

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Additional flotation testwork was undertaken in 2025 to further optimize concentrate recoveries. Variability testwork from HQ diamond drill core was submitted to ALS Burnie Metallurgy Laboratories in March 2026. No results of variability testwork were available for this report.

Leach test work has identified an alkali leaching circuit can produce high value antimony and silver lead products.

1.4 Cut Off Grade

Approximate mine gate breakeven cut-off grade has been calculated from the 2025 metal prices and exchange rates, approximate industry underground mining costs, processing costs and realization rates.

Table 6. Mine gate break even cut off calculation – underground mining

Assumtions Unit Source
Metal Price Ag oz $29 $US/oz LDR 30 Dec 2024
Exchange Rate 0.65 Approximate 2025
Realization rate 77% Approximate industry average
Mining Recovery 90% Approximate industry average
Mill Recovery 89% Approximate LDR Test work
Milling cost $35 $/t Industry average sulphide flotation
Mining Cost $130 $/t Estimated industry narrow vein ug mine
Operating cost $165 $/t LDR assumed average industy Op Costs
Calculations
Mine Gate Price $31 (Metalpricerealizationmill recovery)/ exchange
Operating cost/tonne of ore insitu $183 Operating Cost / mining recovery
Ag Eq. g/t break even cut off 186

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2 GEOLOGY

2.1 Local Geology

The geology of EL9/2019 (2M/2023) is split by a major thrust, the east dipping Rosebery Fault, separating the Cambrian Mt Read Volcanics (MRV) in the east from the Cambrian Dundas Group/Rosebery Group to the northwest (Figures 5 and 6). The MRV are northsouth trending with open folding in the south of the tenement increasing to steeply east dipping isoclinal folding adjacent to the Rosebery Fault in the north. The local geology in the north Dundas area has been modified from MRT 1:25k mapping, RGC company mapping (Cartwright, 1989) and the author’s mapping and observations in the Rosebery, Natone Creek, Exe Valley, and Dundas areas (Figure 2).

2.1.1 Mt Read Volcanics

The Cambrian MRV on EL9/2019 are dominated by the White Spur Formation (WSF) felsic volcaniclastics, shale and rhyolitic intrusives in the southeast of the EL. The WSF forms the immediate hangingwall to the Rosebery and Hercules deposits with a prominent black shale often forming the base. The bottom of the WSF contains serval large polymict felsic mass flow breccias/greywackes with interbedded siltstones, felsic crystal sandstones and slate.

2.1.2 Dundas Group/Rosebery Group

Immediately west of the Rosebery Fault is a Complex sequence of Cambrian siliciclastic and volcanic rocks of the Dundas/Rosebery Group. The stratigraphy and relationships of the Dundas/Rosebery Group are poorly understood with correlations from the DundasRenison area to the Natone Creek-Rosebery region difficult. Age dating and stratigraphic relationships are limited compared to the information available east of the Rosebery Fault.

The Dundas/Rosebery Group strikes north south and dips steeply east near the Rosebery Fault. It is folded into a series of north trending tight to open folds defined by facing reversals.

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Figure 2. Geology of the Moore’s Pimple - Ring River area, (EL2/2020, EL7/2019 and ML 2M/2023.

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Figure 3. 1VD TMI image of the Moore’s Pimple-Ring River area, (EL2/2020, EL7/2019 and ML 2M/2023.

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The Dundas Group unconformably overlies the 515Ma allochthonous Mafic-ultramafic complex tectonically emplaced over the <550Ma Crimson Creek Formation located west and northwest of the EL. Structural or basement highs of mafic -ultramafic rocks are located near Moore’s Pimple, immediately east of the Rosebery Fault. The Ultramaficmafic rocks have a complex relationship with the younger Dundas Group Salisbury Conglomerate and Red Lead Conglomerate.

In the Dundas to Exe Creek region the Red Lead Conglomerate immediately overlies the ultramafic complex, consisting of variable quantities of rounded, polymict mafic and silicic clasts, chert and hematite altered quartzite. A sequence of shale and mafic volcaniclastic turbidites and mafic volcanics overlies the red lead conglomerate.

The Salisbury Conglomerate overlies the Exe Creek mafic volcaniclastics and basalt/gabbro to the east towards EL7/2019. The conglomerate varies along strike but generally consists of rounded polymict clasts of quartz phyric rhyolite, mafic volcanics, chert, phyllite slate and diagnostic fuchsite altered chromite grains. Interbedded with the Salisbury Conglomerate are lenses of dolomite, graphitic shale and siliciclastic/volcaniclastic greywacke. The Salisbury conglomerate is located east of the Montezuma deposit, in faulted contact with the Proterozoic Concert Schist.

2.1.3 Proterozoic Concert Schist

The Concert Schist, hosting the Montezuma deposit consists of tightly folded laminated to thinly bedded siliciclastic turbidite and graphitic shale. A distinctive dolomitic conglomerate (Maestries Conglomerate) is located within the Concert Schist just east of the Montezuma Deposit.

2.1.4 Carboniferous Granite.

The Pine Hill Granite outcrops 5km northwest of EL7/2019. Gravity Modelling (Leeman and Richardson, 2003), alteration and mineralisation mapping and limited diamond drilling indicate that a ridge of granite extends from the Heemskirk Batholith in the west to Granite Tor in the east, extending below the Spero tenements (Figure 4). This ridge of granite and the Pine Hill granite is responsible for the mineralisation of Renison Bell Tin Mine and the extensive Ag-Pb fissure vein mineralisation of the Zeehan-Dundas Mineral fields. High grade Pb-Zn-Ag-Sb fissure vein mineralization occurs in haloes around granite bodies (Collins et. al. 1981). Although high grade, Pb-Zn-Ag-Sb lodes are typically small (1-100kt) such as the numerous deposits of the Zeehan-Dundas field. The two largest Carboniferous granite related Pb-Zn-Ag fissure vein deposits occur outside the Zeehan - Dundas Field but highlight the potential of the mineralisation style:

Mt Farrell Mine 0.91Mt @ 12.5% Pb, 2.5% Zn and 408g/t Ag Magnet Mine 0.63Mt @ 7.3% Pb, 7.3% Zn and 427g/t Ag

(Source: Tasmanian Geological Survey Bulletin 72, The Geology and Mineral Deposits of Tasmania; a summary, Seymour DB, Green GR and Calver CR, February 2006)

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Figure 4. Western Tasmanian Carboniferous Granites and mineral deposits with sub surface modelled granite contours (Leeman and Richardson, 2003).

2.1.5 Mineralisation

EL7/2019 and 2M/2023 and the surrounding area hosts numerous historic mineral deposits related to the Carboniferous granite with multiple commodities including Ag-PbZn fissure loads with critical mineral associations of Sb, Bi, Sn and W.

The Montezuma deposit consists of fissure vein hosted sulphide mineralisation associated with the north-south trending Montezuma Fault and associated splay structures. The Montezuma Fault dips steeply east, with drill defined mineralisation extending over 250m strike length and 200m dip, remaining open in all directions. Two main lodes have been identified through the 2025 drilling program, the Montezuma Lode and the Footwall Lode (Figure 5). The footwall Lode is a splay off the Montezuma lode trending north northwesterly and dipping steeply east. There are numerous subsidiary mineralised structures and breccia zones between the two main mineralised lodes.

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Mineralisation is complex, consisting of an early-stage pyrite-arsenopyrite phase with associated tin and gold mineralisation. A later stage of jamesonite-tennantiteargentiferous galena and occasionally chalcopyrite crosscuts the pyrite-arsenopyrite.

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Figure 5. Montezuma Section 5365125N with Footwall Fault and Montezuma Fault

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Figure 6. Montezuma Long projection AgEq x m.

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Figure 7. Montezuma Long projection Sb eq x m.

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3 DRILLING DATA

All data has been derived from diamond drilling for this MRE, including 4 historic exploration holes from the 1980’s, 13 holes drilled by Spero mining prior to 2025 and 42 drill holes from the current drilling program. Spero has conducted systematic grid-based exploration/resource definition drilling since April 2025. The program is ongoing. Drill hole data for this estimate was compiled in an Access database from Lode‘s MX Deposits database.

As of March 2026, the database contains 4 historic diamond drill holes for 823.9m and 55 recent drillholes for 7,622.6m. Of the recent holes, 37 were systematic exploration holes with thirteen earlier Spero holes clustered around the box cut and five metallurgical drill holes. Drilling is ongoing with this estimate including drillhole data up to MZS41.

3.1 Drilling Techniques

All drilling data used for this estimation is derived from diamond drill core. Spero drillholes pre 2025 were drilled NTW (64.3mm diameter). Spero drillholes completed by Edrill from 2025 were drilled NQ2 (50.7mm). Historic EZ drill holes were drilled NQ (45.7mm diameter). Five HQ (63.5mm) diamond holes were drilled for metallurgical testwork samples in 2026.

Recent drill holes were drilled with an underground Atlas Copco Diamec diamond drill rig to allow drilling of shallow angle holes in the steep terrain, optimizing drill hole intercept angles.

Core recoveries are generally excellent (100%) within mineralised zones in the Montezuma and Footwall Faults (Table 7).

Table 7. Core Recoveries

Montezuma Lode
Footwall Lode
Montezuma Lode
Footwall Lode
Number of samples 164 52
Minimum value 75.0 100.0
Maximum value 100.0 100.0
Mean 99.7 100.0
Median 100.0 100.0
Geometric Mean 99.7 100.0
Variance 6.2 0.0
Standard Deviation 2.5 0.0
Coefficient of variation 0.0 0.0

Drilling techniques and core handling are to industry standard and are considered suitable for resource estimation.

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3.2 Drill Hole Location

All drill collars used for this estimate were located by licensed surveyors. Collar locations are recorded in the GDA94 Zone 55 datum. Downhole surveys for the 2025 drilling program were completed with a Longyear Trushot down hole digital survey tool. EZ drill holes were surveyed with an Eastman single shot downhole camera. The short length Spero holes did not have down hole surveys.

Drill hole spacing is generally 30m to 40m for the majority of the MRE. Drill hole location is of high quality and is considered appropriate for Mineral Resource estimation.

3.3 Geological Logs

Drill core was transported to Spero’s Zeehan core facility. Core was reconstituted, marked up, measured for recovery, RQD and photographed by trained field staff.

All logging of Spero holes was completed on site by experienced geologists on MX Deposits software. Logging was systematic, using standardised geology codes. Drill logs include lithology, alteration, mineralisation, colour, weathering and structures.

Logged mineralised zones were marked up for sampling including several metres either side as per industry standard.

Validation and reconciliation tests indicate that geological and geochemical data is appropriate for Mineral Resource estimation.

An updated and validated version of the drill Database is located in digital format with this report.

3.4 Sampling and Sub Sampling

Drill core marked for sampling by experienced geologist was sampled on 1m intervals with a minimum length of 0.5m whilst respecting geological boundaries. Core was cut in half using a diamond saw as per industry standard. Half core was ticketed, bagged and dispatched to ALS Laboratories in Burnie under the supervision of Spero Staff.

3.5 Assay Data

Half core was sent to ALS laboratories in Burnie for sample preparation and the prepped samples sent to ALS Brisbane for analysis.

Sample preparation comprised drying (DRY-21), weighing, crushing to 85% passing 2mm (CRU-36) and a 3kg split pulverised to 85% passing 75um (PUL-33). The assay methods included 4 acid digest followed by multi element ICP-AES spectrometry (MEICP61). Gold was analysed by 30g fire assay method Au-AA25. Sn and Sb ore grade was analysed by fused disc XRF(XRF15c) (refer to ALS assay codes). High grade samples triggered further OG62 OG46 and XRF15 analysis.

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Sample preparation and analysis is considered to be of a high industry standard and suitable for the estimation of Mineral Resources.

Digital data provided by the laboratory was uploaded to Lode’s MX Deposit database and the Access database used for this MRE.

3.6 Data Validation and QAQC

Certified reference materials and blanks were inserted at a rate of >5% at the appropriate locations. Coarse and pulp duplicates were requested at >5%.

All CRM fall within the accepted limits with the exception of CRM GSB04. GSB04 has not performed well on other projects suggesting the CRM was not homogenized adequately or has become contaminated as other CRM for the same sample batch performed within acceptable limits.

Pulp Duplicate analyses performed well with minor acceptable variance between original and duplicate samples. Coarse duplicate samples demonstrate minor variance with increasing grade reflective of the nugget effect. Although it may be preferable to pulverize the entire sample, the variance is unlikely to significantly affect the MRE.

The assay methods employed are considered appropriate for total analysis.

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4 MINERAL RESOURCE ESTIMATION

The Montezuma Mineral Resource has been estimated using an ordinary kriged block model created with Surpac[tm] software licensed to Tim Callaghan. The block model extends between 5,363,850 to 5364280 mN, 372,900 to 373,350 mE and 250 to 700 mRL. Block Sizes are set at 4 x 4m with sub cells to 1in the y and z directions and 1m with sub cells to 0.25m in the x direction. Block sizes have been set at approximately one fifth of the drill spacing.

4.1 Geological Domaining

Wire-framed solid models of geological and mineralisation domains were created from approximately 20-40m spaced east-west cross sections utilizing diamond drill hole data and surface sampling and mapping. Two separate solid model domains were created for the Montezuma and Footwall Lodes based on geological logging and grade boundaries above 200g/t AgEq where possible. A minimum down hole width of 1m was used for each drillhole intercept resulting in some lower grade pyrite-arsenopyrite mineralisation included in the wireframes. Hard boundaries were frequently controlled by mineralogy or faulting and therefore cut off grades were not often required.

Three smaller stockwork lenses were modelled (unnamed objects 4, 5 and 6) between the lodes where significant widths and grades were intercepted.

Mineralised domain models and lithological codes are listed in Table 84. Geology solid models created during the interpretation of geological data include the Fault planes and the footwall and hangingwall surfaces of Maestries Dolomitic conglomerate.

Table 8. Domain Codes

Domain Code Database Flag
Waste
Montezuma Lode
Footwall Lode
Object 4
Object 5
Object 6
1
2
3
4
5
6
na
2
3
4
5
6

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4.2 Compositing of Data

Data used for this estimation has been derived solely from diamond drill holes.

DDH intercepts of solid models have been flagged with Surpac Software and relevant intervals stored in an access database. DDH data has been composited on 1m lengths. Composites of less than 0.1m were not included in statistical studies or in the MRE.

4.3 Sample Statistical Studies

Descriptive univariate statistics and histograms of 1m composited diamond drill hole data for the major mineralogical domains are located in Appendix 2 of this report and summarized in Tables 9 and 10. The Ag 1m composites demonstrate a skewed, essentially log normal distribution typical of vein hosted precious metal deposits (Figure 8 and 9). Interestingly the Au 1m composites have a weakly skewed distribution and low coefficient of variation which is unusual for this type of deposit. The base metal Cu, Pb, Sb 1m composites are moderately skewed with a few outliers. All domains with a coefficient of variation greater than 1.3 and were considered for top cut to the 97.5[th] percentile values. However, the clustering of high-grade data from the box cut area has biased the statistics. The density of high-grade data in this area and the number of drill holes constraining the interpolation is considered to restrict local bias. Consequently, no top cutting was applied for this preliminary estimate with the decision to be reviewed for future estimations.

Table 9. Summary of 1m composite univariate statistics Montezuma Lode

Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Number of samples 178 178 178 174 174 174 174 174
Minimum value 3 0.00 0.02 0.01 0.01 0.01 2.18 0.03
Maximum value 2540 5.93 30.14 20.12 3.59 3.59 38.30 12.35
Mean 206 0.38 2.54 1.37 0.57 0.57 14.39 3.52
Median 78 0.10 0.81 0.31 0.37 0.37 12.52 2.87
Geometric Mean 86 0.11 0.69 0.32 0.33 0.33 12.14 1.88
Variance 130496 0.63 19.15 7.14 0.36 0.36 63.66 9.57
Standard Deviation 361 0.80 4.38 2.67 0.60 0.60 7.98 3.09
Coefficient of variation 1.75 2.07 1.72 1.95 1.05 1.05 0.55 0.88

Table 10. Summary of 1m composite univariate statistics Footwall Lode

Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Number of samples 54 54 54 54 53 54 54 54
Minimum value 2 0.00 0.00 0.00 0.01 2.53 0.01 0.01
Maximum value 1675 3.31 6.23 2.95 3.64 37.00 12.25 12.25
Mean 179 0.41 1.23 0.68 0.77 13.70 2.85 2.85
Median 82 0.13 0.65 0.26 0.43 11.96 1.63 1.63
Geometric Mean 67 0.10 0.37 0.21 0.36 11.14 1.28 1.28
Variance 70211 0.41 2.41 0.68 0.72 68.28 9.79 9.79
Standard Deviation 265 0.64 1.55 0.83 0.85 8.26 3.13 3.13
Coefficient of variation 1.48 1.55 1.26 1.22 1.11 0.60 1.10 1.10

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Figure 8. 1m Ag composite cumulative frequency histogram of Montezuma Lode.

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Figure 9. 1m Ag log10 composite cumulative frequency histogram of Montezuma Lode.

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Figure 10. 1m Sb composite cumulative frequency histogram of Montezuma Lode.

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There is relatively good correlation between Ag, Sb and Pb with correlation coefficients of greater than 0.6 representative of the late-stage Ag-Sb-Pb jamesonite-boulangeritelenaite-tetrahedrite mineralisation (Table 11). Early-stage Cu-Sn-Au pyrite-arsenopyritestannite/kesterite demonstrate slightly stronger correlation coefficients, with Au and As strongly correlated suggesting most of the Au is early and associated with arsenopyrite. There is relatively poor correlation between Sn and Ag and poor correlation between Sn and Sb. The metal correlations suggest the domaining based on Ag Equivalentmineralised structure is appropriate for Ag, Sb and Pb and possibly less so for Cu, Sn and Au. However, as they are both hosted in common structures with thin laminated mineralisation the observation is academic rather than practical.

Table 11. Montezuma Lode coefficient of correlation table.

Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Ag ppm
Cu %
Pb %
Sb %
Auppm
Sn %
S %
As %
Ag ppm 1.00 0.42 0.62 0.72 0.47 0.34 0.42 0.47
Cu % 0.42 1.00 0.00 0.07 0.54 0.90 0.41 0.29
Pb % 0.62 0.00 1.00 0.96 0.36 -0.01 0.34 0.39
Sb % 0.72 0.07 0.96 1.00 0.40 0.05 0.36 0.41
Auppm 0.47 0.54 0.36 0.40 1.00 0.53 0.75 0.70
Sn % 0.34 0.90 -0.01 0.05 0.53 1.00 0.28 0.25
S % 0.42 0.41 0.34 0.36 0.75 0.28 1.00 0.65
As % 0.47 0.29 0.39 0.41 0.70 0.25 0.65 1.00

4.4 Variogram Modeling

Variography of 1m composited data was modeled using Surpac Software (see Appendix 4 for all variogram models). Variogram models were constructed from 1m composited data for the largest domain, the Montezuma Fault (178 composites) for Ag, Cu, Pb and Sb only. Variogram maps identified the y and x directions as having the most continuity with minor to no anisotropy present. Variogram models were constructed in the x, y with the y direction set at 0[o] (Figure 11).

Some variograms outside the direction of maximum continuity were poorly constructed due to the low number of composites and distance between samples. Variograms typically displayed low to moderate nugget effect of approximately 10-20% of the sill with low ranges to sill of approximately 15m.

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Figure 11. Montezuma Lode Ag variogram model (y direction)

Table 12. Variogram Parameters (spherical models).

Domain Direction Nugget Sill Range
Ag Y 0.1 0.9 15
X 0.1 0.9 15
Z 0.1 0.9 2
Sb Y 0.1 0.9 12
X 0.1 0.9 10
Z 0.1 0.9 2
Cu Y 0 1.0 40
X 0 1.0 50
Pb Y 0 1.0 12
X 0.1 0.9 6

4.5 Resource Estimation Procedure.

The Montezuma Resource Ag and Sb, grades have been interpolated into a blockmodel using an ordinary kriged algorithm. Cu, Pb, S, As, Au and Sn grades were interpolated using an ID[2] algorithm. Block sizes were set at 4m x 4m sub-celling to 0.1m in the y and z direction and 1m with sub-celling to 0.25m in the x direction.

Spherical and octant search ellipses were trialed with a spherical ellipse used for the interpolation. There was insufficient data for the use of octant searches resulting in too many cells not being interpolated. Spherical variogram model parameters used for each domain are outlined in Table 13. A search ellipse of 45m was used to allow the interpolation to use data from neighboring drill holes the search ellipse is too large for the variogram ranges but considered appropriate for this level of study.

The minimum and maximum sample numbers were set at 2 and 8 based on the kriging slope of regression. The low minimum number of samples is required due to the thin nature of the mineralisation with most intercepts having 1-3 composites at most.

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Table 13. Search Neighborhood

Parameter Value
Ellipse Plunge 0
Ellipse bearing 0
Ellipse dip -70
Search Radius 45m
Major:semi major ratio 1
Major:minor ratio 1
Discretisationpoints 3:3:3
Minimum No of samples 2
Maximum No of samples 8

4.6 Bulk Density

Specific gravity determinations from half diamond drill core from the 2025 drilling using the Archimedes method in the Zeehan core processing facility. Drill core used for the determinations was un-weathered and non-porous. Data was stored in Lodes MX Deposits database and uploaded to the access database used for this estimation. Table 14 summarises the Bulk Density of the main waste and mineralised lithologies in the Montezuma area.

Table 14. Lithology Bulk Density Summary Statistics.

Massive Sulphide Semi Massive Sulphide
Shale
Sandstone
Massive Sulphide Semi Massive Sulphide
Shale
Sandstone
Massive Sulphide Semi Massive Sulphide
Shale
Sandstone
Massive Sulphide Semi Massive Sulphide
Shale
Sandstone
Count 142 106 294 106
Minimumg/cm3 2.82 2.75 2.38 2.53
Maximumg/cm3 5.62 4.11 3.68 4.18
Averageg/cm3 3.86 3.14 2.85 2.85

The average specific gravity for shale and sandstone of 2.8g/[cm3] was allocated to all waste zones in the blockmodel. The bulk Density of the mineralised zones was estimated by an inverse distance squared algorithm from 1m composited specific gravity measurements in the database. Summary statistics of 1m composited specific gravity composites are listed in Table 15.

Table 15. Specific Gravity 1m Composites

Montezuma Lode Footwall Lode Montezuma Lode Footwall Lode
Number of samples 149 42
Minimum value 2.30 2.75
Maximum value 5.54 4.56
Mean 3.45 3.43
Median 3.32 3.35
Geometric Mean 3.40 3.40
Variance 0.36 0.27
Standard Deviation 0.60 0.52
Coefficient of variation 0.17 0.15

The low specific gravity composites may result in local underestimation of the bulk density but are not considered material for this level of study. No top or bottom cuts were applied to the data.

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5 RESULTS

The total estimated Mineral Resource for the Montezuma Silver-Antimony deposit at a 200g/t Ag Equivalent cutoff, classified as Inferred and Indicated Resource in accordance with the 2012 edition of the JORC Code is located in Table 16

Table 16. Montezuma Inferred and Indicated Mineral Resource AgEq. > 200g/t

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----- Start of picture text -----

Classification K Tonnes Ag g/t Au ppm Cu % Pb % Sb % Sn % S % As % Ag_eq g/t
Indicated Resource 310 172 0.63 0.58 1.98 1.01 0.53 13.7 2.9 621
Inferred Resource 170 173 0.57 0.7 1.35 0.31 0.31 18.9 3.6 375
Total 480 173 0.61 0.62 1.75 0.76 0.45 15.6 3.2 533
----- End of picture text -----

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----- Start of picture text -----

Montezuma Ag-Sb Grade-Tonnage Curve
650
600
550
500
450
400
350
300
100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250
Cut off Ag eq g/t
Ktonnes Ag_eq
Ktonnes Ag eq g/t
----- End of picture text -----

Figure 12. Montezuma Deposit Grade-Tonnage Curve

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Figure 13. Montezuma block model interpolated Ag, looking southwest.

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Figure 14. Montezuma blockmodel interpolated Sb, looking southwest.

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Figure 15. Montezuma blockmodel interpolated Ag Equivalent, looking southwest.

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6 VALIDATION

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The block model and digital mine model were validated by comparing input and output statistics across the deposit.

Interpolated grade verses input grade was validated visually on a sectional basis by visually assessing the sliced models with raw drill hole data. Interpolated block grades correlate well with DDH data (close to drill hole but vary rapidly with distance from input data.

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Figure 16. MRE Sb block section 5,364,085mNE

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Figure 17. MRE AgEq block section 5,364,085mNE

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Kriging Slope of Regression drops significantly to 0.2 towards the limit of the variogram range suggesting much of the resource beyond this range is poorly estimated. The lower confidence interpolated grade is offset by the high degree of confidence in the modelled geology for this level of resource estimation. It is likely there will be some local shortrange variance in geology and grade.

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7 CLASSIFICATION

The MRE within 30m of a drill hole (twice the variogram range) has been classified as Indicated Resource as there is a high degree of confidence in the geological model although less confidence in the interpolated grade beyond 10m of input data.

Resources beyond 30m of drillhole data are classified as Inferred Resource.

Classification codes assigned to the block model include:

Code Status 1 Inferred Resource 2 Indicated Resource

8 RECOMMENDATIONS

The Montezuma Deposit remains open in all directions and future resource additions are likely with ongoing exploration/extension drilling. It is reasonable to assume, through extrapolation, that the immediate Montezuma locality contains an exploration target of the order of 0.2-0.5Mt @ 450-500g/t AgEq. (The potential quantity and grade of Exploration Targets are conceptual in nature, and there has been insufficient exploration to estimate a Mineral Resource. It is uncertain if further exploration will result in the estimation of a Mineral Resource). It is recommended that the exploration/extension drilling program be continued to test the immediate vicinity of the Montezuma Deposit. Ongoing extension drilling of approximately 50m spaced drilling is recommended.

Variogram modelling suggests the optimum drill spacing drill spacing for grade control should be 15-20m. Structural continuity is predictable mitigating the uncertainty in short range grade estimation. The current drill pattern is appropriate for resource extension drilling. Further analysis is required to determine optimum grade control spacing, including access and cost.

A scoping study to determine the approximate target size and grade to pass capital infrastructure and operating cost benchmarks. The scoping study should include mine design, metallurgy and flow sheet design and preliminary reserve estimation.

District exploration to delineate and include additional deposits to support a centralized processing facility.

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ADDITIONAL NOTES

1Silver Equivalent

Montezuma’s reported silver equivalent figure is based on conversion factors as follows:

AgEq(g/t) = Ag (g/t) + 355Sb (%) + 20Pb (%) + 101*Cu (%)

Metal equivalent conversion factors were calculated using 30 December 2024 metal prices of US$34,747/t antimony, US$29.1/oz silver, US$1,912/t lead and US$8,705/t copper. The antimony price was calculated as an average of several antimony products in a number of markets including:

antimony concentrate delivered China antimony ingot FOB China antimony trioxide FOB China antimony trioxide in warehouse Baltimore antimony ingot in warehouse Baltimore antimony trioxide in warehouse Baltimore antimony trioxide in warehouse Rotterdam

Metal equivalent conversion factors were calculated using a preliminary flotation test carried out by ALS Metallurgy (Burnie) in March 2026, where recoveries achieved were 88.4% antimony, 93.0% silver, 88.4% lead and 91.5% copper. It is Lode’s opinion that all the elements included in the metal equivalents calculation have a reasonable potential to be recovered and sold.

Limitations and Consent

The report is provided to Spero Mining Ltd in the context of a mineral resource estimate and should not be used or relied upon for any other purpose.

This report has been prepared using information available to the Author at the time of writing. The opinions stated herein are given in good faith and with the belief that the basic assumptions are factual and correct and the interpretations reasonable.

This report is not intended for the use as a public document nor, in whole or in part, in a public document without written consent to the form and context in which it appears.

2Forward Looking Statements

Some statements in this report regarding estimates or future events are forward-looking statements. They include indications of, and guidance on, future earnings, cash flow, costs and financial performance. Forward looking statements include, but are not limited to, statements preceded by words such as “planned”, “expected”, “projected”, “estimated”, “may”, “scheduled”, “intends”, “anticipates”, “believes”, “potential”, “could”, “nominal”, “conceptual” and similar expressions. Forward looking statements, opinions and estimates included in this announcement are based on assumptions and contingencies which are subject to change without notice, as are statements about market and industry trends, which are based on interpretations of current market conditions. Forward-looking statements are provided as a general guide only and should not be relied on as a

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guarantee of future performance. Forward-looking statements may be affected by a range of variables that could cause actual results to differ from estimated results and may cause the Company’s actual performance and financial results in future periods to materially differ from any projections of future performance or results expressed or implied by such forward looking statements. These risks and uncertainties include but are not limited to liabilities inherent in mine development and production, geological, mining and processing technical problems, competition for capital, acquisition of skilled personnel, incorrect assessments of the value of acquisitions, changes in commodity prices and exchange rate, currency and interest fluctuations, various events which could disrupt operations and/or the transportation of mineral products, including labour stoppages and severe weather conditions, the demand for and availability of transportation services, the ability to secure adequate financing and management’s ability to anticipate and manage the foregoing factors and risks. There can be no assurance that forward-looking statements will prove to be correct.

Statements regarding plans with respect to the Company’s mineral properties may contain forward-looking statements in relation to future matters that can only be made where the Company has a reasonable basis for making those statements.

This announcement has been prepared in compliance with the JORC Code (2012) and the current ASX Listing Rules. The Company believes that it has a reasonable basis for making the forward-looking statements in the announcement, including with respect to any production targets and financial estimates, based on the information contained in this and previous ASX announcements.

Competent Persons’ Declarations

The information in this announcement that relates to Mineral Resource Estimations and Exploration Targets is based on, and fairly represents, information and supporting documentation compiled by Mr. Tim Callaghan for Spero Mining Ltd. Mr. Callaghan is an independent mining consultant working for Resource and Exploration Geology. Mr. Callaghan is a Member of the Australian Institute of Mining and Metallurgy and has sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration and to the activity which they are 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 (the JORC Code). Mr. Callaghan consents to the inclusion of this information in the form and context in which it appears.

The information in this report that relates to metallurgical test work has been compiled by Mr Alvin Johns for Spero Mining Ltd. Mr. Johns a self employed independent metallurgical consultant and a Member of the Australian Institute of Mining and Metallurgy, who has sufficient experience relevant to the style of mineralisation and type of deposit under consideration to qualify as a Competent Person under the JORC Code. Mr Alvin Johns consents to the inclusion of this information in the form and context in which it appears.

Statement of Independence

Tim Callaghan has no material interest or entitlement in the securities or assets of Lode Resources Ltd or any associated companies.

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This announcement has been approved and authorised by Lode Resource Ltd.’s Managing Director, Keith Mayes.

For more information on Lode Resources and to subscribe for our regular updates, please visit our website at www.loderesources.com or email [email protected]

List of Previous Exploration Announcements that include drilling information used to inform this MRE

  1. LDR announcement 9 December 2024 “Montezuma Antimony Project Development Activities Commence” 4. LDR announcement 21 January 2025 “Montezuma Antimony Project Inaugural High-Grade Assays” 5. LDR announcement 3 February 2025 “High-Grade Antimony and Silver Drill Intercepts” 6. LDR announcement 25 February 2025 “Up to 31.9% Antimony and 5,460 g/t silver” 7. LDR announcement 10 April 2025 “Extensive Drill Programme Underway at Montezuma Antimony Project” 8. LDR announcement 30 April 2025 “Quarterly Activities Reports for the Period Ended 31 March 2025”

  2. LDR announcement 1 July 2025 “Multiple High-Grade Antimony and Silver Drill Intercepts”

  3. LDR announcement 14 July 2025 “Gold Assays Enhance High-Grade Antimony and Silver Drill Intercepts”

  4. LDR announcement 21 July 2025 “Tin Assays Enhance High-Grade Antimony and Silver Drill Intercepts” 12. LDR announcement 18 August 2025 “More High-Grade Antimony and Silver Drill Intercepts” 13. LDR announcement 8 September 2025 “Grades up to 2,730 g/t Silver Eq and Deepest Intercept To Date”

  5. LDR announcement 30 September 2025 “Montezuma Regional High-Grade Silver & Antimony Assays”

  6. LDR announcement 10 November 2025 “Further High-Grade Drill Results Extend the Montezuma Silver & Antimony Deposit”

  7. LDR announcement 6 January 2026 titled “Up To 1,948g/t Silver Eq in Latest Drill Results from the Montezuma Silver & Antimony Deposit”

  8. LDR announcement 4 March 2026 “Lode Secures 155km[2 ] of Highly Prospective Ground in Tasmania’s Premier West Coast Mining District”

  9. LDR announcement 24 March 2026 ” Deepest Drill Hole To Date Extends Montezuma Silver & Antimony Deposit To 270m Depth”

No Material Changes

The Company confirms it is not aware of any new information or data that materially affects the information included in this announcement and that all material assumptions and technical parameters underpinning the exploration activities in this market announcements continue to apply and have not materially changed.

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JORC (2012) Table 1 report

Section 1Sampling Techniques and Data Section 1Sampling Techniques and Data Section 1Sampling Techniques and Data
Criteria JORC Code Explanation Commentary
Sampling Techniques
Nature and Quality of sampling (e.g. cut
channels, random chips or specific specialized
industry
standard
measurement
tools
appropriate to the minerals under investigation,
such as downhole gamma sondes, or handheld
XRF instruments etc.).

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 (reverse.
circulation drilling was used to obtain 1m
samples from which 3kg was pulverized to
produce 30g 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
sampling types (e.g. submarine nodules) may
warrant disclosure of detailed information.

Industry
standard
wireline
diamond
drilling
techniques were used at the Montezuma Silver &
Antimony Project to obtain NQ2 diamond core.

An underground Atlas Copco Diamec drill rig was
used to drill shallow dipping holes in steep
topography (50.7mm diameter).

Drilling orientation was designed to intercept the
mineralisation
at a high angle to
ensure
representivity.

Logged mineralisation was sampled on a 1m basis
while respecting geological boundaries with a
diamond saw for diamond drill core.

Bulk
metallurgical
sample
composited
from
unweathered material derived from box cut costean
on Montezuma Lode. Sample of 100kg blended to
include
boulangerite-jamesonite,
arsenopyrite-
pyrite and graphitic shale gangue to simulate
representative mill feed.

Sampling techniques are considered appropriate
for this style of mineralisation.
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, where core is oriented
and if so by what method

All drilling was completed as standard tube wireline
NQ2 diamond drilling producing core 50.7mm in
diameter.

An underground Atlas Copco Diamec drill rig was
used to allow shallow dipping holes in steep
topography

No core orientation was carried out.

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Criteria JORC Code Explanation Commentary
Sample recovery
Method of recording and assessing core and chip
sample recoveries and results assessed.

Measures taken to maximize 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.

Drill core was reconstituted and measured for
recovery and RQD by experienced field technicians
in LDR’s Zeehan core storage facility.

Core recoveries are 100% in mineralised zones.

No relationship exists between sample recovery
and grade.
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.

Drill holes were geologically logged by an
experienced geologist to industry standard.

Geological logs were qualitative with quantitative
estimates of mineral contents.

Quantitative logging includes sulphide and gangue
mineral percentages. Mineralised intervals were
marked for sub sampling and quantitative analysis.

All drill core was photographed wet and dry
Sub-Sample techniques
and sample preparation

If core, whether cut or sawn and whether quarter
o half 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 maximize representivity of
samples.

Measures taken to ensure that the sampling is
representative of the insitu material collected,
including
for
instance
results
of
field
duplicate/second half sampling.

Whether sample sizes are appropriate to the
grain size of the material being sampled

Core was prepared using standard industry best
practice for diamond core with the core to be
sampled sawn in half using a diamond saw.

Half core was bagged and numbered on a 1m basis
while respecting geological boundaries with a
minimum width of 0.5m.

Samples were generally 2-3kg.

The sample size is considered appropriate for the
material being sampled.

The samples were sent to ALS Burnie and
Brisbane for analysis.

QAQC included industry best practice insertion of
blanks and standards were at >5% where
appropriate.

Coarse crush and pulp duplicates were requested
and performed by ALS at >5%.

All QAQC performed within acceptable limits.

Metallurgical
sample
blended
with
gangue
sulphides and shale to simulate expected mill feed.
Metallurgical sample crushed to pas 1.18mm then
ground to p80 150micron.

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Criteria JORC Code Explanation Commentary
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 geophysics tools, spectrometers, handheld
XRF instruments, etc., the parameters used in
determining the analysis including instrument
make and model, reading times, calibration
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.

Samples were stored in a secure location and
transported to the ALS laboratory in Burnie by LDR
staff.

Sample preparation comprised drying (DRY-21),
weighing, crushing to 85% passing 2mm (CRU-36)
and a 3kg split pulverized to 85% passing 75um
(PUL-33).

The assay methods included 4 acid digest followed
by multi element ICP-AES spectrometry (ME-
ICP61). Gold was analysed by 30g fire assay
method Au-AA25. Sn and Sb ore grade was
analysed by fused disc XRF(XRF15c) (refer to ALS
assay codes). High grade samples triggered further
OG62 OG46 and XRF15 analysis.

Certified reference materials and blanks were
inserted at a rate of >5% at the appropriate
locations. Coarse and pulp duplicates were
requested at >5%. All QAQC fall within the
accepted limits.

The assay methods employed are considered
appropriate for total analysis.

Metallurgical sample tested at ALS Burnie
laboratory
using
industry
standard
flotation
techniques.
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

Laboratory results have been reviewed by the
Managing Director.

Significant intersections are reviewed by the
Managing Director.

No twin holes were drilled.

Commercial laboratory certificates and digital data
were supplied by ALS and uploaded to mining
software.

Industry standard QAQC reported within
acceptable limits.

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Criteria JORC Code Explanation Commentary
Location of data points
Accuracy and quality of surveys used to locate
drill holes (collar and downhole surveys)
trenches, mine workings and other locations
used in mineral resource estimation

Specification of grid system used

Quality and accuracy of topographic control

Preliminary collar positions were located by
handheld GPS

Drill holes collars and the orientation of the collars
were located with a total station RTK GPS.

All locations are reported in GDA94 MGA Zone 55.

Down hole surveys were completed with a Boart
Longyear Tru-core tool at 50m intervals.

Topographic control from government lidar and
RTK GPS validation.

Metallurgical sample located at costean/box cut
5,364,175mN, 373,150mE, 610mRL
Data
Spacing
and
distribution

Data spacing for exploration results

Whether data spacing and distribution is
sufficient to establish the degree of geological
and grade continuity appropriate for Mineral
Resource
and
Ore
Reserve
estimation
procedures and classifications applied.

Whether sample compositing has been applied

Drill holes were designed to provide a 25 x 25 to 50
x 50m drilling pattern.

Drill hole spacing is considered appropriate for
resource estimation and exploration purposes

The data spacing, distribution and geological
understanding is considered to be sufficient for the
estimation of mineral resource estimation.

No data compositing has been applied.
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 drilling orientation and
the orientation of key mineralised structures is
considered to have introduced sampling bias,
this should be assessed and reported if material.

Drill holes were designed to intersect the
mineralised lodes approximately perpendicular to
the strike and dip and are considered close to true
width.

An underground drill rig was used to allow multiple
high angle holes from the same drill pad.

Drill hole orientation is not considered to have
introduced any bias.
Sample Security
The measures taken to ensure sample security.

Samples were bagged and sealed on site and
transported to ALS Burnie by LDR staff.
Audits or Reviews
The results of any audits or reviews of sampling
techniques and data

No audits or reviews of sampling data and
techniques completed.

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Section 2 Reporting of Exploration Results

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 tenure held at the time of
reporting along with known impediments to
obtaining a license to operate the area

The Montezuma Project is located on tenements
EL7/2019 and 2M/2023.

These tenements are 100% held by Spero Mining
Pty Ltd, Granville Mining Pty Ltd and parties related
to the recent 100% acquisition by Lode Resources
Ltd.

Native titles do not exist over the above tenements.

All leases/tenements are in good standing.
Exploration
done
by
other parties

Acknowledgement and appraisal of exploration
by other parties

The Montezuma deposit was discovered during
extensive historic silver mining activity in the
Zeehan-Dundas region in the 1880’s to the 1920’s.

Electrolytic Zinc Company (EZ) completed 3
diamond holes including MZP245a that intersected
high grade antimony-silver-lead mineralisation in
1983.

Spero Mining established a costean on the
mineralisation and drilled several short diamond
holes.

Spero commenced metallurgical testwork including
flotation and leaching.
Geology
Deposit type, geological setting and style of
mineralisation

The Montezuma Silver and Antimony Deposit is a
structurally controlled fissure vein lode hosted in
the Montezuma Fault. Fault related fissure vein
mineralisation is associated with Silurian granite
intrusions associated with widespread Sn-W and
Pb-Zn-Ag-Sb
mineralising
event
in
western
Tasmania. Low temperature, high sulphidation Ag
rich base -metal mineralisation is located distally to
high temperature Sn-W deposits. Antimony and
lead are contained primarily within Jamesonite, a
lead-iron-antimony
sulphide
mineral
(Pb4FeSb6S14). Stibnite (Sb2S3) is also relatively
abundant. This project is also prospective for gold,
zinc, copper, tin and tungsten.

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Criteria JORC Code Explanation Commentary
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 of the drill hole collar

dip and azimuth of the hole

downhole 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

Exploration results are available in previous LDR
ASX releases listed at the end of text body of this
report.

A table of drill hole collar details used for this
estimation is included at the end of this report.
Data aggregation
methods

In the reporting of Exploration Results, weighting
averaging
techniques,
maximum
and/or
minimum grade truncations (e.g. cutting of high
grades) and cutoff grades are usually material
and should be stated.

Where aggregate intercepts include short
lengths of high-grade results and longer lengths
of low-grade results, the procedure used for
aggregation should be stated and some
examples of such aggregations should be shown
in detail

The assumptions used for any reporting of metal
equivalent values should be clearly stated.

Exploration results have been previously released
by LDR for all drill holes used in this MRE.
Exploration results are available in previous LDR
ASX releases listed at the end of text body of this
report.

Exploration results were length weighted for LDR
ASX releases.

AgEq(g/t) = Ag(g/t) + 357Sb (%) + 20Pb (%) +
91*Cu (%)

Metal
equivalent
conversion
factors
were
calculated using 30 December 2025 metal prices
of US$34747/t antimony, US$29.1/oz silver,
US$1912/t lead and US$8705/t copper.

Metal
equivalent
conversion
factors
were
calculated using a preliminary flotation test carried
out by ALS Metallurgy (Burnie) in September 2019
where recoveries achieved were 88.4% antimony,
93% silver, 84.4% lead and 91.5% copper. It is
Lode’s opinion that all the elements included in the
metal equivalents calculation have a reasonable
potential to be recovered and sold.

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Criteria JORC Code Explanation Commentary
Relationship between
mineralisation widths
and intercept lengths

These relationships are particularly important in
the reporting of Exploration Results with respect
to the drill hole angle is known, its nature should
be reported.

If it is not known and only the downhole lengths
are reported, there should be a clear statement
to this effect (e.g. down hole length, true width
not known)

The azimuth and dip of all diamond drill holes were
oriented approximately perpendicular to the strike
direction of the mineralisation.

An Atlas Copco Diamec underground drill rig was
used to allow shallow dipping holes in the steep
topography to achieve industry best practice drill
intercepts.

Down hole and estimated true width intercepts are
included in the body of this report.
Diagrams
Appropriate maps and sections (with scales) and
tabulated intercepts should be included for any
significant discovery being reported. These
should include but not be limited to a plan view of
drill collar locations and appropriate sectional
views.
Refer to plans and sections within the body of this
report.
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


This announcement refers to the Mineral Resource
Estimation of the Montezuma Deposit and is not a
report for Exploration Results.

All previous exploration results are available in
LDR ASX releases listed at the end of the body of
this report.

A table of drill collar locations and significant
intercepts is located at the end of this report.

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Criteria JORC Code Explanation Commentary
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 results, bulk density, groundwater,
geochemical and rock characteristics, potential
deleterious or contaminating substances.

Development of portal box cut and exploration
drive has commenced with samples taken from
three development faces up to the initial adit face,
each representing a 2.4m mining cut.

Box Cut location 5364175mN, 373,150E, 610mRL
on Montezuma lode outcrop.

Development of a portal box cut and the
commencement of an exploration drive has
produced stockpiled mineralisation.

Preliminary
metallurgical
testwork
including
flowsheet design, test work and engineering plans
for the Montezuma Silver & Antimony Project were
completed by CORE Resources Brisbane and ALS
Burnie.
Further work
The nature and scale of planned further work
(e.g. test 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.

Infill and extension diamond drilling is currently in
progress.

Exploration, metallurgical, mining and marketing
studies are in progress.

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SECTION 3, REPORTING OF MINERAL RESOURCE ESTIMATIONS

SECTION 3, REPORTING OF MINERAL RESOURCE ESTIMATIONS SECTION 3, REPORTING OF MINERAL RESOURCE ESTIMATIONS SECTION 3, REPORTING OF MINERAL RESOURCE ESTIMATIONS
Criteria JORC Code Explanation Commentary
Database Integrity
Measures to ensure the data has not been
corrupted by, for example transcription or keying
errors, between its initial collection and its use
for Mineral Resource estimation.

Data Validation and procedures used.

All data captured and stored in a customised MX
Deposits and Access database.

Data integrity validated with Access and Surpac
Software for EOH depth and sample overlaps and
transcription errors.

Historic data digitized by database consultants and
uploaded to access database.

Basic statistical analysis of 1m composites confirms
the validity of the data for resource estimation.
Site Visits
Comment on any site visits by the competent
person and the outcome of any of those visits.

If no site visits have been undertaken, indicate
why this is the case.

Numerous site visits during 2025-2026 drilling
campaigns.
Geological
Interpretation

Confidence in (or conversely the uncertainty of)
the geological interpretation of the mineral
deposit.

Nature of the data used and any assumptions
made.

The effect if any of alternative interpretations on
Mineral Resource estimation

The use of geology in guiding and controlling the
Mineral Resource estimation

The factors affecting continuity of both grade
and geology.

High confidence in the geological model. Simple
fissure vein hosted mineralisation.

Diamond drillholes used for sectional geological
domaining.

No alternative geological interpretations were
attempted nor considered necessary

Geology model used for mineralised domain
modeling.

Grade continuity variable depending on late stage
jamesonite-tetrahedrite-galena-laneite
mineralisation.
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 resource

Continuous North and Northwest striking fault with
footwall splay. Strike over 250m length remaining
open. Steep Easterly dip (-60-70o). Drilled to 200m
depth and remaining open to the east.

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Criteria JORC Code Explanation Commentary
Estimation and
Modelling 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 characterization).

In the case of blockmodel interpolation the block
size in relation to the average sample spacing
and search employed.

Any assumptions behind modeling of selected
mining units

Any assumptions about correlation between
variables

Description of how the geological interpretation
was used to control the resource estimates.

Discussion of the 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 the use of reconciliation data if
available.

Block modeled estimation completed with SurpacTM
software licensed to Tim Callaghan.

Wire-framed solid models created from diamond drill
holes.

Solid models snapped to drill holes

Minimum mining width of 1m @ 200g/t AgEq.

Internal dilution restricted to 0.5m with allowances for
geological continuity

Data composited on 1m downhole lengths including
Ag, Cu, Pb, Sb. Au, As, Sn and S.

No top cutting of composited data despite high CV
due to clustering of high grades near box cut

Good correlation between Ag, Sb and Pb grades and
poor correlation with As, Sn and Au.

Model extent of 5,363,850 mN to 5,364,280 mN,
372,900 mE to 373,350 mE, 250 mRL to 700 mRL.
Block dimensions of 4mN x 1mE x 4mRL block size
with sub-celling to 1, 1 and 0.25m for x, y, z.

Variogram models well constructed with low nugget
effect (10%) and short range of 15 to sill for both
Montezuma and Footwall domains.

Search ellipse set at 45m spherical range to ensure
all blocks populated with no anisotropy

Ordinary kriged block model constrained by geology
– grade based solid models.

Block grades validated visually against input data

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Criteria JORC Code Explanation Commentary
Moisture
Whether the tonnages were estimated on a dry
basis or with natural moisture, and the method
of determination of moisture content.

The MRE was estimated on a dry tonnage basis
Cut-off Parameters
The basis of the adopted cutoff grades or cutoff
parameters

Cut off grades have been based on estimated mine
grade break even costs. Estimated operating costs
from industry averages and financial parameters
were provided by Lode Resources. A break-even
cutoff grade of 200g/t Ag_Eq is calculated for
potential underground mining and sulphide flotation
Mining 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 made when
estimating Mineral Resources may not always
be rigorous. When this is the case, this should
be reported with an explanation of the basis of
the mining assumptions made.

Underground mining will involve conventional
decline accessed sill drives with Avoca style stoping
with waste backfill. Production rates are expected to
be 100ktpa.
Metallurgical
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 made regarding
metallurgical
treatment
processes
and
parameters made when estimating Mineral
Resources may not always be rigorous. When
this is the case, this should be reported with an
explanation of the basis of the metallurgical
assumptions made.

Metallurgical studies commenced in 2020

Flotation testwork at ALS Laboratories Burnie
ongoing.

Float concentrate produced with 88.4% antimony,
93.0% silver, 88.4% lead and 91.5% copper recovery

Leach testwork completed by CORE Resources
Brisbane.

Alkali leaching producing high value Sb and Ag-Pb
products

Ore sorting testwork in progress

Early flow sheet design is in progress.

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Criteria JORC Code Explanation Commentary
Environmental
assumptions

Assumptions made regarding possible waste
and process residue disposal options. It is
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 greenfields project,
may not always be well advanced, the status for
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.


Baseline studies of natural values and water quality
commenced.

Conceptual use of waste rock as backfill.

Waste rock geochemical characterisation planned
for 2026.

FINN Environmental to complete Environmental
Impact assessment.
Bulk Density
Whether assumed or determined. If assumed
the basis for the assumptions. If determined the
methods used, whether wet or dry, the
frequency of measurements, the nature size and
representativeness of the samples.

The bulk density for bulk materials must have
been measured by methods that adequately
account for void spaces (vughs, porosity etc.),
moisture and difference between rock and
alteration zones within the deposit.

Discuss assumptions for bulk density estimates
used in the evaluation process of the different
materials.

Specific gravity measurements made using the
Archimedes Method on drill core.

Mean Bulk density of mineralisation = 3.5, Waste =
2.8

Bulk Density estimated from inverse distance
squared SG measurements made on drill core.

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Criteria JORC Code Explanation Commentary
Classification
The basis for the classification of the Mineral
Resource into varying confidence categories.

Whether appropriate account has been taken of
all relevant factors (i.e. relative confidence in
continuity of Geology and metal values, quality,
quantity and distribution of the data).

Whether the result appropriately reflects the
Competent Persons view of the deposit.

Confidence in the geological model, data quality and
interpolation is considered to be sufficient for Mineral
Resource located within 25m of sample data to be
classified as Indicated Resource.

All other interpolated resources are classified as
Inferred Resource.

Classification reflects the view of the Competent
Person
Audits or Reviews
The results of any Audits or Reviews of the
Mineral Resource estimates.

No audits or reviews have been completed for this
estimation
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 of the estimate.

These statements of relative accuracy and
confidence of the estimate should be compared
with production data, where available.

The geological model is well understood.

Data quality is of a high standard and appropriate for
resource estimation.

Variogram ranges suggest grade estimation beyond
15m is of poor quality and is reflected in the kriging
efficiency and slope of estimated blocks.

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Montezuma Ag-Sb Drill Collar Details

hole_id x y z max_depth azm dip core size
EDGI01 373197.4 5364189 636.09 102 281 -80 NTW
MZP244 373139 5364142 628.8 250 241 -60 NQ
MZP245 373197.6 5364186 635.7 50 241 -80 NQ
MZP245a 373197.6 5364186 635.7 374 240 -80 NQ
MZP260 373231.1 5363914 645 149.9 256 -70 NQ
MZS01 373167.1 5364168 634.5 30.5 294 -50 NTW
MZS02 373167.1 5364168 634.5 36 83 -50 NTW
MZS03 373167.6 5364167 634.5 34.5 265 -50 NTW
MZS04 373167.6 5364167 634.5 34.5 278 -51 NTW
MZS05 373113.6 5364149 614.463 49.4 270 -45 NQ2
MZS06 373112.8 5364149 613.553 59.3 90 -11 NQ2
MZS07 373112.4 5364149 613.251 74.4 87 -25 NQ2
MZS08 373112.2 5364149 612.979 104.5 90 -38 NQ2
MZS09 373095.4 5364126 610.397 78.3 90 -1 NQ2
MZS10 373095.4 5364126 610.256 90.8 88.4 -15.3 NQ2
MZS11 373095.3 5364126 609.783 107.6 90 -27 NQ2
MZS12 373094.8 5364126 609.288 152.1 90 -37 NQ2
MZS13 373094.5 5364126 609.247 209.2 86.9 -44.2 NQ2
MZS14 373085.1 5364083 622.478 107.6 90 -5 NQ2
MZS15 373084.4 5364083 621.885 113.5 90 -23 NQ2
MZS16 373083.9 5364083 621.638 167.4 88.8 -36.6 NQ2
MZS17 373083.5 5364083 621.517 233.6 90 -45 NQ2
MZS18 373069 5364042 629.842 134.7 90 -5 NQ2
MZS19 373068.9 5364043 629.624 224 90 -16 NQ2
MZS20 373068.8 5364043 629.442 164.7 90 -26 NQ2
MZS21 373068.9 5364043 629.31 203.5 91 -34.4 NQ2
MZS22 373068.8 5364043 629.128 281.8 90 -45 NQ2
MZS23 373056.1 5364001 634.968 135 90 2 NQ2
MZS24 373055.8 5364001 634.514 179.5 91.5 -11.9 NQ2
MZS25 373055.8 5364001 634.242 202.3 90.7 -21.1 NQ2
MZS26 373055.6 5364001 633.883 230.4 91.1 -32.3 NQ2
MZS27 373055.3 5364001 633.742 311.7 90 -40 NQ2
MZS28 373111.8 5363957 638.411 158.2 90 -24 NQ2
MZS29 373111.4 5363957 638.081 170.3 90.5 -33.2 NQ2
MZS30 373111 5363957 637.817 200.6 86.3 -47.3 NQ2
MZS31 373024 5364190 598.297 161.9 95 1 NQ2
MZS32 373023.9 5364191 597.804 179.5 97.4 -8 NQ2
MZS33 373023.6 5364191 597.271 203.9 93.4 -20.1 NQ2
MZS34 373023.5 5364191 597.233 230.8 95 -26 NQ2
MZS35 373023.3 5364191 597.019 249.6 98.9 -35.5 NQ2
MZS36 373023.7 5364211 601.657 239 94.9 -27.8 NQ2
MZS37 373023.3 5364211 600.966 269.1 92.6 -37.1 NQ2
MZS38 373023.9 5364211 601.822 191.8 90 -19.5 NQ2
MZS39 373024 5364211 601.988 170.5 90 -8 NQ2
MZSFW1 373147.2 5364148 630.11 12.5 105 -40 NTW
MZSFW2 373146.4 5364148 629.79 20.2 105 -48 NTW
MZSFW3 373147.4 5364152 629.96 15 65 -45 NTW
MZSFW4 373148.6 5364152 630.34 12.7 65 -42 NTW
MZSFW5 373148.2 5364155 630.52 8.6 33 -48 NTW
MZSFW6 373148.7 5364157 630.66 7.2 33 -30 NTW
MZSFW7 373141.6 5364143 629.8 22.5 105 -40 NTW
MZSFW8 373141.6 5364143 629.8 16.7 105 -30 NTW
MZS40 373024.2 5364211 602.542 151.4 90.8 3 NQ2
MZS41 373004.6 5364045 614.439 413.4 89.1 -45.5 NQ2

48

==> picture [157 x 50] intentionally omitted <==

Montezuma Drilling Results 2025-26

BHID
Depth m
BHID
Depth m
From m To m
Length m Ag ppm
As %
Cu %
Pb %
Zn%
Sb %
Au ppm
Sn_pct
From m To m
Length m Ag ppm
As %
Cu %
Pb %
Zn%
Sb %
Au ppm
Sn_pct
From m To m
Length m Ag ppm
As %
Cu %
Pb %
Zn%
Sb %
Au ppm
Sn_pct
From m To m
Length m Ag ppm
As %
Cu %
Pb %
Zn%
Sb %
Au ppm
Sn_pct
From m To m
Length m Ag ppm
As %
Cu %
Pb %
Zn%
Sb %
Au ppm
Sn_pct
From m To m
Length m Ag ppm
As %
Cu %
Pb %
Zn%
Sb %
Au ppm
Sn_pct
From m To m
Length m Ag ppm
As %
Cu %
Pb %
Zn%
Sb %
Au ppm
Sn_pct
From m To m
Length m Ag ppm
As %
Cu %
Pb %
Zn%
Sb %
Au ppm
Sn_pct
From m To m
Length m Ag ppm
As %
Cu %
Pb %
Zn%
Sb %
Au ppm
Sn_pct
From m To m
Length m Ag ppm
As %
Cu %
Pb %
Zn%
Sb %
Au ppm
Sn_pct
From m To m
Length m Ag ppm
As %
Cu %
Pb %
Zn%
Sb %
Au ppm
Sn_pct
MZS28 158.2 67.5 73 5.5 34 1.0 0.1 1.2 0.0 0.6 0.13 0.07
MZS29 170.3 112 113 1 48 0.3 0.0 0.6 0.0 0.2 0.06 0.02
MZS30 200.6 64 66 2 29 3.8 0.2 0.0 0.0 0.0 0.64 0.18
MZS23 135 96 97 1 30 0.3 0.0 1.0 0.5 0.2 0.02 0.05
MZS23 135 98 99 1 15 0.6 0.0 0.7 0.0 0.4 0.03 0.05
MZS24 179.5 112 114 2 23 0.8 0.0 0.8 0.0 0.4 0.12 0.07
MZS24 179.5 120.5 121 0.5 49 0.3 0.0 2.9 0.0 1.0 0.04 0.02
MZS25 202.3 139 144 5 117 1.5 0.2 1.4 0.0 0.8 0.27 0.15
MZS26 230.4 177 178 1 63 1.8 0.1 0.7 0.0 0.2 0.10 0.06
MZS27 311.7 226.3 230.2 3.9 190 5.4 1.8 0.1 0.0 0.1 0.80 0.22
MZS23 135 44 45.7 1.7 266 0.6 0.0 2.3 0.0 0.0 0.17 0.02
MZS27 311.7 196 196.5 0.5 170 5.9 2.4 0.8 0.1 0.4 1.21 1.98
MZS18 134.7 95.3 96 0.7 11 1.0 0.0 0.0 0.0 0.0 0.43 0.04
MZS19 224 105.9 110.5 4.6 302 4.5 1.6 1.9 1.1 2.3 0.88 1.57
MZS20 164.7 125.8 130.3 4.5 52 1.1 0.1 1.5 0.0 0.7 0.46 0.13
MZS20 164.7 132.8 134.7 1.9 147 2.8 0.1 2.0 0.0 0.9 0.69 0.06
MZS21 203.5 157 158 1 136 1.0 0.0 0.0 0.0 0.0 0.18 0.04
MZS22 281.8 227.8 237 9.2 76 6.2 0.4 1.0 0.1 0.1 0.64 0.26
MZS41 460 341.9 344.1 2.2 191 2.4 0.3 3.5 0.0 0.1 0.32 0.10
MZS18 134.7 86.1 86.6 0.5 90 9.5 0.0 0.2 0.0 0.1 1.86 0.34
MZS19 224 100.6 102.3 1.7 235 3.4 0.9 1.8 0.8 1.2 0.88 0.90
MZS21 203.5 137 137.5 0.5 58 0.7 0.0 2.4 2.0 0.5 0.03 0.01
MZS22 281.8 251 252 1 211 1.5 1.0 2.1 0.1 0.9 0.35 0.13
MZS14 107.6 84 85 1 41 2.2 0.1 3.1 0.1 1.2 0.25 0.08
MZS15 113.5 100 103.5 3.5 142 2.0 0.8 1.4 0.1 0.8 0.47 0.87
MZS16 167.4 137.6 138.3 0.7 108 5.2 0.4 0.4 0.2 0.3 1.02 0.37
MZS17 233.6 197.3 198.3 1 226 7.2 1.0 0.4 0.2 0.2 0.79 0.22
MZS14 107.6 45 46 1 200 6.1 0.6 0.7 0.1 0.6 1.42 0.83
MZS15 113.5 64.3 65.9 1.6 114 4.0 0.4 2.4 0.0 1.2 1.26 1.25
MZS16 167.4 99.7 103.7 4 584 3.2 1.1 0.6 1.5 0.7 1.57 2.21
MZS17 233.6 150.4 155.9 5.5 196 6.3 0.9 0.2 0.4 0.2 0.93 0.80
MZS14 107.6 33 33.5 0.5 28 1.6 0.0 0.2 0.0 0.1 0.36 0.04
MZS14 107.6 52 53 1 40 1.5 0.0 0.1 0.0 0.1 0.56 0.06
MZS14 107.6 61 61.5 0.5 95 3.0 0.1 0.0 0.0 0.1 0.61 0.50
MZS14 107.6 70.8 71.5 0.7 9 3.8 0.1 0.3 0.0 0.2 0.53 0.14
MZS15 113.5 106 107 1 67 0.5 0.2 0.0 0.0 0.1 0.28 0.31
MZS16 167.4 56.5 57.3 0.8 151 0.6 0.1 0.2 0.1 0.1 0.10 0.05
MZS16 167.4 128 129 1 48 0.1 0.2 0.3 0.1 0.2 0.14 0.04
MZS16 167.4 166 166.5 0.5 162 0.9 0.5 0.4 0.9 0.2 0.16 0.05
MZS17 233.6 178 181 3 161 0.2 1.1 1.2 0.7 0.4 0.16 0.09
MZS17 233.6 205 205.5 0.5 197 4.4 1.5 0.1 0.1 0.1 0.61 0.09
MZS17 233.6 215 216 1 146 0.6 0.5 0.8 1.9 0.4 0.26 0.06
MZS05 49.4 41.7 44.5 2.8 231 6.4 0.1 5.5 0.0 2.9 0.90 0.08
MZS06 59.3 49.6 51 1.4 115 4.2 0.2 6.0 0.0 2.8 0.43 0.21
MZS07 74.4 64.6 65.2 0.6 35 2.7 0.0 0.6 0.0 0.3 0.32 0.08
MZS08 104.5 83.5 84.1 0.6 129 7.5 0.2 2.4 0.0 1.2 0.76 0.57
MZS08 104.5 95 96 1 719 4.5 2.0 1.2 0.1 1.0 0.40 1.96
MZS05 49.4 8.4 9 0.6 71 1.6 0.0 2.1 0.5 0.0 0.03 0.08
MZS06 59.3 13 14.5 1.5 567 4.8 0.2 13.5 1.2 0.3 0.09 0.06
MZS07 74.4 17.4 19 1.6 60 3.4 0.0 1.8 5.4 0.1 0.17 0.42
MZS09 78.3 66.4 67 0.6 56 3.4 0.1 1.1 0.0 0.6 0.55 0.40
MZS10 78.3 76.9 78.5 1.6 251 5.7 0.2 5.6 0.0 3.3 0.57 0.18
MZS11 107.6 98.8 102.3 3.5 956 5.4 1.9 1.0 0.0 1.0 0.85 1.51
MZS12 152.1 125.8 127.3 1.5 209 1.4 3.1 0.2 0.2 0.2 3.26 2.77
MZS13 209.2 160.7 161.8 1.1 172 10.9 3.2 0.7 0.2 0.5 1.46 2.58
MZS09 78.3 13.8 14.7 0.9 59 5.9 0.0 3.0 0.0 1.3 1.12 0.10
MZS10 78.3 17.5 18.2 0.7 13 3.5 0.0 0.1 0.0 0.0 0.83 0.03
MZS11 107.6 26.5 27.5 1 168 7.9 0.6 1.8 0.0 1.1 1.46 0.73
MZS12 152.1 37.6 38.2 0.6 13 2.9 0.0 0.0 0.0 0.0 0.89 0.06
MZS13 209.2 51.8 59 7.2 309 2.9 0.8 2.8 0.1 1.6 1.50 0.90
MZS11 107.6 81 82 1 73 2.4 0.1 4.8 2.1 2.4 0.17 0.08
MZS11 107.6 94.8 95.8 1 99 7.5 0.4 0.4 0.0 0.2 1.02 1.00
MZS12 152.1 56 57 1 526 3.2 1.3 1.1 0.1 1.2 0.91 0.98
MZS12 152.1 71 72 1 32 0.2 0.0 0.5 0.0 0.2 0.07 0.05
MZS13 209.2 156.5 157 0.5 126 3.7 1.8 2.7 0.0 1.6 0.52 0.08
MZS31 161.9 137 141 4 35 0.4 0.0 0.6 0.1 0.0 0.14 0.05
MZS32 179.5 154.9 156 1.1 23 1.4 0.1 0.9 0.2 0.3 0.34 0.11
MZS33 203.9 176 177 1 68 1.1 0.0 0.5 0.0 0.2 0.07 0.03
MZS34 230.8 189.8 190.5 0.7 233 11.0 3.2 0.4 0.0 0.2 1.00 2.93
MZS35 249.6 204 204.5 0.5 511 3.4 1.8 0.3 0.3 0.5 0.39 0.05
MZS31 161.9 81 83 2 18 1.2 0.0 0.4 0.0 0.2 0.09 0.06
MZS32 179.5 80.9 82.5 1.6 380 4.8 0.1 0.1 0.0 0.1 1.39 0.06
MZS33 203.9 111 112.5 1.5 235 4.7 0.2 1.0 0.1 0.4 1.18 0.83
MZS34 230.8 135.8 139.5 3.7 166 4.3 0.2 2.4 0.0 1.2 0.25 0.34
MZS35 249.6 184.5 185 0.5 47 0.6 0.2 0.7 0.0 0.2 0.10 0.65
MZS32 146 144.4 145 0.6 231 0.7 0.0 5.0 0.8 0.2 0.27 0.05
MZS33 203.9 137 137.5 0.5 340 0.5 0.1 10.4 1.0 0.5 0.03 0.01
MZS34 230.8 173 174 1 176 0.1 0.1 0.4 0.2 0.2 0.01 0.09
MZS36 239 195 196 2.2 36 0.5 0.0 0.3 0.0 0.0 0.06 0.04
MZS37 269.1 226.5 227.2 0.7 143 3.6 0.9 0.2 0.0 0.2 0.47 0.05
MZS38 191.8 165 166.2 0.5 60 0.6 0.0 1.0 0.0 0.4 0.13 0.10
MZS39 170.5 143.7 146 2.3 15 4.2 0.0 0.4 0.1 0.1 0.24 0.02
MZS40 151.4 133 133.7 0.7 119 4.4 0.1 15.5 0.0 6.9 0.63 0.30
MZS36 239 128.3 130.5 2.2 95 1.4 0.1 2.1 0.0 0.8 0.44 0.12
MZS37 269.1 219 219.5 0.5 18 3.6 0.0 0.1 0.0 0.0 0.39 0.04
MZS38 191.8 80 81 1 62 0.2 0.0 0.1 0.0 0.1 0.11 0.05
MZS39 170.5 65 66 1 19 2.7 0.1 2.4 0.0 1.1 0.25 0.18
MZS40 151.4 46 48 2 16 3.0 0.0 1.0 0.0 0.5 0.14 0.23
MZS36 239 210.5 211 0.5 283 0.1 0.0 9.5 0.0 0.0 0.05 0.02
MZS38 191.8 106.5 107 0.5 99 4.1 0.6 2.9 0.0 1.4 0.40 0.05
MZS39 170.5 87 87.5 0.5 34 0.8 0.0 0.1 0.0 0.0 0.31 0.05
MZS40 151.4 72.3 72.8 0.5 562 8.6 1.3 3.8 0.1 2.4 1.14 1.24

49