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Mineral Reserves and resources (as at 31 December 2024)1

Houndé mine (90% owned)
Current as at 31 December 2024 On a 100% basis On an attributable basis
Resources shown inclusive of reserves Tonnage
(Mt)		 Grade
(Au g/t)		 Content
(Au koz)		 Tonnage
(Mt)		 Grade
(Au g/t)		 Content
(Au koz)
Proven reserves 2.6 1.06 90 2.4 1.06 81
Probable reserves 55.9 1.42 2,554 50.3 1.42 2,298
P&P reserves 58.5 1.41 2,643 52.6 1.41 2,379
Measured resources  2.6 1.07 91 2.4 1.07 82
Indicated resources  64.8 1.53 3,182 58.3 1.53 2,864
M&I resources 67.5 1.51 3,273 60.7 1.51 2,945
Inferred resources 6.8 1.50 327 6.1 1.50 294

Houndé mine

Current as at 31 December 2024 On a 100% basis On an attributable basis
Resources shown inclusive of reserves Tonnage
(Mt)		 Grade
(Au g/t)		 Content
(Au koz)		 Tonnage
(Mt)		 Grade
(Au g/t)		 Content
(Au koz)
Proven reserves 11.3 0.91 331 9.6 0.91 282
Probable reserves 67.3 1.49 3,222 57.4 1.49 2,756
P&P reserves 78.6 1.41 3,553 67.1 1.41 3,038
Measured resources 11.4 0.91 331 9.7 0.91 281
Indicated resources  97.8 1.62 5,093 83.3 1.62 4,350
M&I resources  109.1 1.55 5,423 93.0 1.55 4,631
Inferred resources 9.1 1.59 467 7.8 1.59 398

Ity mine

Current as at 31 December 2024 On a 100% basis On an attributable basis
Resources shown inclusive of reserves Tonnage
(Mt)		 Grade
(Au g/t)		 Content
(Au koz)		 Tonnage
(Mt)		 Grade
(Au g/t)		 Content
(Au koz)
Proven reserves 16.7 1.02 549 15.1 1.02 494
Probable reserves 33.9 2.49 2,711 30.5 2.49 2,439
P&P reserves 50.7 2.00 3,260 45.6 2.00 2,934
Measured resources  19.9 1.13 724 17.9 1.13 651
Indicated resources 60.5 2.29 4,463 54.5 2.29 4,017
M&I resources 80.4 2.01 5,186 72.4 2.01 4,668
Inferred resources 20.4 2.01 1,322 18.4 2.01 1,190

Sabodala-Massawa mine

Current as at 31 December 2024 On a 100% basis On an attributable basis
Resources shown inclusive of reserves Tonnage
(Mt)		 Grade
(Au g/t)		 Content
(Au koz)		 Tonnage
(Mt)		 Grade
(Au g/t)		 Content
(Au koz)
Proven reserves 1.1 2.88 100 1.0 2.88 90
Probable reserves 6.5 2.77 577 5.8 2.77 520
P&P reserves 7.6 2.79 678 6.8 2.79 610
Measured resources 3.0 3.51 334 2.7 3.51 300
Indicated resources 13.0 3.32 1,388 11.7 3.32 1,249
M&I resources 15.9 3.36 1,721 14.3 3.36 1,549
Inferred resources 8.5 3.51 959 7.6 3.51 863

Mana mine

Current as at 31 December 2024 On a 100% basis On an attributable basis
Resources shown inclusive of reserves Tonnage
(Mt)		 Grade
(Au g/t)		 Content
(Au koz)		 Tonnage
(Mt)		 Grade
(Au g/t)		 Content
(Au koz)
Proven reserves – – – – – –
Probable reserves – – – – – –
P&P reserves – – – – – –
Measured resource – – – – – –
Indicated resources 18.1 1.22 707 16.3 1.22 637
M&I resources  18.1 1.22 707 16.3 1.22 637
Inferred resources 16.2 2.24 1,167 13.4 2.28 986
Current as at 31 December 2024 On a 100% basis On an attributable basis
Resources shown inclusive of reserves Tonnage
(Mt)		 Grade
(Au g/t)		 Content
(Au koz)		 Tonnage
(Mt)		 Grade
(Au g/t)		 Content
(Au koz)
Proven reserves 3.0 0.94 90 2.4 0.94 72
Probable reserves 41.4 1.70 2,267 33.1 1.70 1,813
P&P reserves 44.4 1.65 2,357 35.5 1.65 1,885
Measured resources 3.0 0.94 90 2.4 0.94 72
Indicated resources 43.2 2.03 2,813 34.6 2.03 2,250
M&I resources  46.2 1.95 2,903 36.9 1.95 2,322
Inferred resources 4.0 1.38 177 3.2 1.38 142

Lafigué mine

Current as at 31 December 2024 On a 100% basis On an attributable basis
Resources shown inclusive of reserves Tonnage
(Mt)		 Grade
(Au g/t)		 Content
(Au koz)		 Tonnage
(Mt)		 Grade
(Au g/t)		 Content
(Au koz)
Proven reserves – – – – – –
Probable reserves 35.6 1.60 1,829 28.5 1.60 1,463
P&P reserves 35.6 1.60 1,829 28.5 1.60 1,463
Measured resources – – – – – –
Indicated resources  46.0 1.57 2,318 36.8 1.57 1,854
M&I resources 46.0 1.57 2,318 36.8 1.57 1,854
Inferred resources 4.6 1.67 245 3.6 1.67 196

Kalana project

Current as at 31 December 2024 On a 100% basis On an attributable basis
Resources shown inclusive of reserves Tonnage
(Mt)		 Grade
(Au g/t)		 Content
(Au koz)		 Tonnage
(Mt)		 Grade
(Au g/t)		 Content
(Au koz)
Proven reserves – – – – – –
Probable reserves – – – – – –
P&P reserves – – – – – –
Measured resources – – – – – –
Indicated resources  – – – – – –
M&I resources  – – – – – –
Inferred resources 3.9 6.91 868 3.5 6.91 781
Current as at 31 December 2024 On a 100% basis On an attributable basis
Resources shown inclusive of reserves Tonnage
(Mt)		 Grade
(Au g/t)		 Content
(Au koz)		 Tonnage
(Mt)		 Grade
(Au g/t)		 Content
(Au koz)
Proven reserves – – – – – –
Probable reserves 72.8 1.76 4,115 72.8 1.76 4,115
P&P reserves 72.8 1.76 4,115 72.8 1.76 4,115
Measured resources – – – – – –
Indicated resources 73.6 1.95 4,604 73.6 1.95 4,604
M&I resources 73.6 1.95 4,604 73.6 1.95 4,604
Inferred resources 3.3 1.97 208 3.3 1.97 208
Current as at 31 December 2024 On a 100% basis On an attributable basis
Resources shown inclusive of reserves Tonnage
(Mt)		 Grade
(Au g/t)		 Content
(Au koz)		 Tonnage
(Mt)		 Grade
(Au g/t)		 Content
(Au koz)
Proven reserves 34.8 1.04 1,160 30.4 1.04 1,019
Probable reserves 313.3 1.71 17,274 278.5 1.72 15,405
P&P reserves 348.1 1.65 18,434 308.9 1.65 16,424
Measured resources 39.8 1.23 1,569 35.0 1.23 1,386
Indicated resources  417.0 1.83 24,567 369.0 1.84 21,825
M&I resources  456.8 1.78 26,136 404.0 1.79 23,211
Inferred resources 76.8 2.33 5,740 67.0 2.35 5,058
  1. Reserves and resources are shown for continuing operations. The mineral reserves and resources were estimated as at December 31, 2024 with the provisions adopted by the Canadian Institute of Mining Metallurgy and Petroleum (CIM) and incorporated into the NI 43-101. The Qualified Persons responsible for the mineral reserve and resource estimated are detailed in the following tables. 

MINERAL RESOURCES

QUALIFIED PERSON POSITION PROPERTY/DEPOSIT
Kevin Harris, CPG VP Resources, Endeavour Mining plc Ity; Houndé (Dohoun, Kari Pump, Vindaloo), Sabodala/Massawa (all except Bambaraya, Kiesta, Niakafiri East, Niakafiri West, Masoto, Mammasoto, Kawsara), Bantou, Assafou Project, Lafigué
Helen Oliver, FGS, CGeol Group Resource Geologist, Endeavour Mining plc Hounde (Kari West, Kari Center-South, Vindaloo South, Dafra, Vindaloo SE, Koho, Mambo); Kalana (Kalanko);  Sabodala-Massawa (Bambaraya, Kiesta, Niakafiri East, Niakafiri West, Kerekounda East, Soukhoto, Delya, Tina, Samina,  Kawsara)
Joseph Hirst, FGS, CGeol

Resource Geologist, Endeavour Mining plc

 Mana (Wona-Kona UG, Siou UG); Sabodala/Massawa(Masoto, Mammasoto, Sofia), Nabanga
Paul Blackney, MAusIMM, MAIG Executive Consultant, Datamine Australia Pty. Ltd. (Snowden Optiro) Kalana deposit

MINERAL RESERVES

QUALIFIED PERSON POSITION PROPERTY/DEPOSIT
Salih Ramazan, FAusIMM Vice President, Mine Planning, Endeavour Mining plc Ity, Houndé, Sabodala-Massawa (OP),
Assafou Project, Lafigué
John R. Walker, FGS, FIMMM, FIQ ​

Technical Director - Mining Advisory SLR

 Mana (Wona-Kona UG, Siou UG)
David M Robson, PEng MBA

Principal Mining Engineer - Mining and Mining Advisory Group - SLR

 Sabodala-Massawa
(Golouma and Kerekounda UG)
Allan Earl, FAusIMM

Executive Consultant, Datamine Australia Pty. Ltd. (Snowden Optiro)

 Kalana project
  1. The mineral resources and mineral reserves have been estimated and reported in accordance with Canadian National Instrument 43-101, 'Standards of Disclosure for Mineral Projects' and the CIM Definition Standards adopted by CIM Council on 10 May 2014, as well as the CIM Estimation of Mineral Resources & Mineral Reserves Best Practice Guidelines as also adopted on 29 November 2019.
  2. Mineral resources that are not mineral reserves do not have demonstrated economic viability.
  3. All mineral resources are reported inclusive of mineral reserves.
  4. Tonnages are rounded to the nearest 100,000 tonnes; gold grades are rounded to two decimal places; ounces are rounded to the nearest 1,000oz. Rounding may result in apparent differences between tonnes, grade and contained metal.
  5. Tonnes and grade measurements are in metric units; contained gold is in troy ounces.
  6. Processing recoveries vary and are a function of many factors including: pit material types, mineralogy and chemistry of the ore. The overall average recoveries are around 89% at Sabodala, 90% at Houndé, 87% at Ity, 88% at Mana, and 95% at Lafigué. The average processing recoveries at the development projects is Kalana at 90% and Assafou at 90%.
  7. The Assafou project is currently 100% owned. Ownership (and attributable Mineral Resource and Mineral Reserves) will change to 90% once an exploitation permit is granted.
  8. The reporting of mineral reserves and resources are based on a gold price as detailed below:
Au Price $/oz 2024 Reserve 2023 Reserve 2024 Resource 2023 Resource
Houndé 1,500 1,300 1,900 1,500
Ity 1,500 1,300 1,900 1,500
Mana 1,500 1,300 1,900 1,500
Sabodala-Massawa 1,500 1,300 1,900 1,500
Lafigué 1,500 1,300 1,900 1,500
Kalana 1,500 1,500 1,900 1,500
Assafou 1,500 – 1,900 1,500

Cut-off grades for the resources are as follows:

a. Houndé: at 0.50g/t Au

b. Ity at 0.50g/t Au

c. Sabodala-Massawa: open pit from 0.31g/t to 1.00g/t Au. Underground from 2.00g/t to 2.84g/t Au

d. Mana OP: open pit for oxide at 0.41g/t Au to 0.56g/t Au, for transitional 0.44g/t Au to 0.69 g/t Au, and sulphide at 0.72g/t Au to 2.54g/t Au

e. Mana UG: Mineral Resources for Siou and Wona underground mines (72% of Mineral Resource) are reported within the constrained underground mineable shapes, generated at a cut-off grade of 2.0 g/t Au and reported above a cut-off of 1.8g/t Au for Siou and 2.0 g/t Au at Wona; the differential between the reported grade of 1.8 g/t Au and the constrained shape grade of 2.0 g/t Au contributes a non-material (2%) of additional ounces at Siou

f. Lafigué: oxide at 0.40g/t Au, transitional and fresh at 0.50g/t Au

g. Kalana: all 0.50g/t Au

h. Bantou: from 0.43g/t Au to 0.86g/t Au

i. Nabanga: at 3.00g/t Au

j. Assafou: at 0.50 g/t Au

Cut-off grades for the reserves are as follows:  

  1. Houndé: oxide: 0.40g/t Au to 0.60g/t Au; transitional: 0.40g/t Au to 0.70g/t Au; fresh: 0.40g/t Au to 0.70g/t except Mambo fresh 1.00g/t Au
  1. Ity: oxide: 0.40g/t Au to 0.50g/t Au; transitional and fresh: 0.40g/t Au to 0.80g/t Au
  1. Sabodala Open Pit WOLP: oxide:  0.50/t Au to 0.60g/t Au; transitional: 0.0g/t Au to 0.70g/t Au; fresh: 0.50g/t Au to 0.89g/t Au
  1. Sabodala Open Pit STP: RedTran: 1.00g/t Au to 1.60g/t Au; fresh: 1.20g/t Au to 1.30g/t Au
  1. Sabodala UG: 2.55g/t Au for Golouma and 2.48g/t for Kerekounda
  1. Mana UG: Mineral Reserve estimation for both Wona and Siou was based on the constrained underground shapes generated at a gold cut-off grade at Wona of 2.60 g/t, Siou South 2.90g/t and Siou North 2.80g/t, at a gold price of USD 1,500/oz
  1. Lafigué: 0.40g/t Au
  1. Kalana and Kalanako pits: oxide: 0.40g/t Au; transitional: 0.50g/t Au; fresh: 0.60g/t Au, 0.00g/t Au for TSF
  1. Assafou Project:  laterite/oxide/transitional: 0.40g/t Au; fresh 0.50g/t Au

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