Cote d'Ivoire

Yaoure Mine

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Overview

Mine TypeOpen Pit
StatusActive
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
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Mine Life... Lock
SnapshotYaouré is located in a rural area in central Côte d’Ivoire, West Africa, on the southern edge of Lake Kossou, 35 km north-west of the capital city of Yamoussoukro.

Perseus Mining poured first gold at the Yaouré Gold Mine in December 2020, becoming its third operation. Perseus declared commercial production at Yaouré in March 2021. 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.

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 AssetCMA UG Expansion Project

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.

Contractors

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Deposit type

  • Mesothermal
  • 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 felsic intrusive rocks of the Birimian Supergroup. The rocks are metamorphosed to lower greenschist facies and only locally feature penetrative deformation fabrics.

In the Yaouré deposits, gold is associated with disseminated pyrite. At CMA deposit, mineralisation is associated with quartz-albite-carbonate veining in reverse fault structures that dip at 25 to 35 degrees to the east and northeast. Yaouré deposit comprises several mineralisation styles controlled by east-dipping structures, similar to CMA, in addition to mineralisation associated with quartz- tourmaline-chlorite-carbonate veining controlled by NE and NW striking, sub-vertical faults and also stockwork quartz veins with associated alteration selvages hosted by a granodiorite intrusive body.

The combined deposits extend over an area around 1.4 km east-west by 2.1 km north-south.

Gold mineralisation is accompanied by traces of molybdenum, tungsten, antimony, bismuth and tellurium indicating that the mineralisation may have affinities with the reduced intrusion-related gold systems (IRGS). The predominance of structural controls and association with carbonatisation, sericitisation and silicification, however, are characteristics that more clearly point to its classification as an orogenic, mesothermal gold deposit.

Addition of the CMA underground to the Yaouré Gold Mine has the potential to extend the LOM and increase the annual ounce production profile by substituting low grade open pit feed with higher grade underground Ore Reserves.

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.

Govisou and Angovia 2 deposits are hosted by Palaeoproterozoic Birimian Supergroup rocks of the Bouaflé Greenstone Belt.

Govisou gold deposit is hosted by a diorite intrusion surrounded by metabasalts. Mineralisation is thought to be associated with both NE and NW striking, subvertical structures but forms a diffuse volume that is almost circular in plan view, about 90m in diameter and plunging at about 60 degrees toward the NNW. Gold is associated with low concentrations of finegrained disseminated pyrite and phengite alteration. Quartz veining is rare.

Angovia 2 deposit comprises gold mineralisation associated with pyrite disseminations and veinlets hosted in chloritecarbonate-silica altered metabasalts. The deposit strikes E-W in an anastomosing shear zone and extends over about 550m strike, with mineralisation controlled by brittle-ductile shears that mainly dip south at 50-60 degrees. Subsidiary northdipping structures also appear to occur.

The Govisou pit shell is approximately 300m in diameter and extends to a maximum depth of 120m. The Angovia 2 pit shell extends over 600m strike E-W and to a maximum depth of approximately 120m.

Addition of the CMA underground to the Yaouré Gold Mine has the potential to extend the LOM and increase the annual ounce production profile by substituting low grade open pit feed with higher grade underground Ore Reserves.

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

Gold mineralisation is associated with quartz-albite-carbonate veining in reverse fault structures, forming a series of interconnected lodes the best developed of which dip at 25 to 30 degrees to the east. The CMA Underground resource comprises five lodes with horizontal widths ranging from 2-3 metres up to 15-20 metres. Ninety per cent of the Indicated Resource tonnage and 93% of the Indicated Resource contained metal is hosted in two principal lodes. Gold is associated with disseminated pyrite within veins and altered wall-rocks. No significant concentrations of other economic metals or deleterious elements are known to occur within the mineralisation. Arsenopyrite and molybdenite occur in trace quantities.

CMA underground Mineral Resource extends from the designed base of the CMA open pit at approximately 200 metres vertical depth, to a maximum vertical depth of approximately 275 metres for Indicated Resources and 425 metres for Inferred Resources. The corresponding down-dip extents beneath the pit design base are approximately 200 metres and 350 metres. The Mineral Resource extends over 1,200 metres in strike length.

The combined deposits extend over an area around 1.4 km east-west by 2.1 km north-south.

Reserves

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Mining Methods

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Comminution

Crushers and Mills

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Processing

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Production

CommodityUnits202320222021
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All production numbers are expressed as metal in doré.

Operational metrics

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Production Costs

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Operating Costs

Currency202320222021
OP mining costs ($/t mined) USD 2.91  2.7  2.71  
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Financials

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Heavy Mobile Equipment

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Personnel

Mine Management

Job TitleNamePhoneEmailProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 27, 2023
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Total WorkforceYear
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Aerial view:

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