Cote d'Ivoire

CMA UG Expansion Project

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Categories

Overview

Mine TypeUnderground
StageFeasibility
Commodities
  • Gold
Mining Method
  • Longhole open stoping
Mine Life... Lock
SnapshotPerseus Mining poured first gold at the Yaouré Gold Mine in December 2020, becoming its third operation. Since 2020, ore at Yaouré has primarily been mined from the CMA open pit, with some contributions from minor satellite pits. CMA open pit stage 2 and stage 3 cutbacks are due to be completed during FY24 and FY25 financial years respectively, whereafter mining will move on to satellite pits and the recently expanded Yaouré open pit.

Yaouré’s updated LOMP incorporates for the first time an UG mining operation below the CMA Open Pit, as well as the existing CMA Open Pit and an expanded Yaouré Open Pit.

Perseus recently completed a CMA UG feasibility study, proving the technical and economic viability of underground mining of the CMA orebody, down dip and down plunge of the stage 3 CMA open pit. Underground mining of the CMA orebody is expected to begin in early FY26, once all related approvals have been received.
Related AssetYaoure

Owners

SourceSource
CompanyInterestOwnership
Government of Côte d’Ivoire 10 % Indirect
Perseus Mining Ltd. 90 % Indirect
Perseus Yaouré SARL (operator) 100 % Direct
Perseus has a 90% interest and the Government of Côte d’Ivoire a 10% free carried interest Perseus Mining Yaouré SA. Perseus owns a 90% interest in Perseus Yaouré SARL, owner of Yaouré Gold Mine.

Deposit type

  • Orogenic
  • Vein / narrow vein

Summary:

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

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

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

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

Reserves

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Mining Methods

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Comminution

Crushers and Mills

Milling equipment has not been reported.

Processing

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Production

Combined production numbers are reported under Yaoure

Operational metrics

Metrics
Annual ore mining capacity  ....  Subscribe
Waste tonnes, LOM  ....  Subscribe
Ore tonnes mined, LOM  ....  Subscribe
Total tonnes mined, LOM  ....  Subscribe
* According to 2023 study.

Production Costs

CommodityUnitsAverage
All-in sustaining costs (AISC) Gold USD  ....  Subscribe
Assumed price Gold USD  ....  Subscribe
* According to 2023 study / presentation.

Operating Costs

Currency2023
UG mining costs ($/t mined) USD 55.1 *  
Processing costs ($/t milled) USD  ....  Subscribe
G&A ($/t milled) USD  ....  Subscribe
* According to 2023 study.

Project Costs

MetricsUnitsLOM Total
Expansion CapEx $M USD  ......  Subscribe
Sustaining CapEx $M USD  ......  Subscribe

Heavy Mobile Equipment

Fleet data has not been reported.

Personnel

Mine Management

Job TitleNamePhoneEmailProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 29, 2023
....................... Subscription required ....................... Subscription required Subscription required Nov 29, 2023
....................... Subscription required ....................... Subscription required Subscription required Nov 29, 2023
....................... Subscription required ....................... Subscription required Subscription required Nov 29, 2023
....................... Subscription required ....................... Subscription required ........... Subscription required ........... Subscription required Oct 24, 2023

Aerial view:

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