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Cote d'Ivoire
Yaoure Mine (CMA UG Expansion Project)

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 Location:
35 km NW from Yamoussoukro, Cote d'Ivoire
  Regional Office:
II Plateaux – Vallons Rue J75/J44 Lot 1438 ilot 145 06 BP 1958
Abidjan
Cote d'Ivoire
06
Phone  ...  Subscription required
Fax+225-22-41-91-25
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
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  • Filings & News
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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2035
Yaouré 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.

Owners

Source: p. 13
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, ........

Mining Methods

  • Truck & Shovel / Loader

Summary:

Yaouré LOMP ore and waste will be mined from 5 sources, including the CMA pit, Yaouré pit, CMA UG, satellite pits and stockpiles. LOMP open pit mining ceases in FY30, and underground mining is planned to be completed in FY34. Processing continues until the end of FY35.

The chosen method for the Open Pit Ore Reserves is conventional open pit mining utilising hydraulic excavators and trucks. A mining bench height of 10 metres is used, with loading on 2.5 metres flitches to minimise ore loss and dilution.

The pit slope design assumptions are based on a geotechnical study by Pitt & Sherry Consultants. Inter- ramp pit slopes are 40 to 60 degrees varied by material weathering level and wall sector. Inter-ramp slopes are excluding ramp but including berms spaced at between 10 and 20 metres vertically and berm widths of 4.5 to 7 metres.

Pit ramps have been designed for a 100-tonne payload truck fleet and are set at 24 metres (dual lane) to 16 metres (single lane).

Minimum mining width of 40 metres was generally applied to the pit cutback designs.

The CMA underground will be mined by a combination of flat longhole open stoping and conventional longhole open stoping mining methods. These methods have been selected as the most cost effective and productive mining methods for the flat-dipping CMA orebody. The mining method is dependent upon the dip
of the orebody which ranges from 5 degrees to 20 degrees for the majority of f ........

Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits202320222021LOM (Projected)
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required1,367,000
All production numbers are expressed as metal in doré.

Operational Metrics:

Metrics202320222021
Plant annual capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required
Stripping / waste ratio  ......  Subscription required  ......  Subscription required  ......  Subscription required
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required
Total tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required
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Reserves at June 30, 2023:
Ore Reserves estimate: variable gold grade cut-offs were applied to in situ open pit material ranging from 0.40 g/t to 0.70 g/t, based upon cut-off for development and stoping of 0.5 g/t and 2.5 g/t was applied to underground material.

Mineral Resource estimate: 0.4 g/t gold cut-off was applied to in situ open pit material, below Stage 3 pit and above 1.5 g/t block grade cut-off applied to underground material, heap leach resources are stated at 0 g/t gold cut-off; only heap leach components with average grade above 0.4 g/t included.

CategoryTonnage CommodityGradeContained Metal
Proven 4.4 Mt Gold 0.84 g/t 119 koz
Probable 32.8 Mt Gold 1.85 g/t 1,953 koz
Proven & Probable 37.2 Mt Gold 1.73 g/t 2,072 koz
Measured 4.4 Mt Gold 0.84 g/t 119 koz
Indicated 50.3 Mt Gold 1.66 g/t 2,684 koz
Measured & Indicated 54.7 Mt Gold 1.59 g/t 2,804 koz
Inferred 11.3 Mt Gold 1.9 g/t 701 koz

Commodity Production Costs:

CommodityUnits202320222021
Cash costs Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Total cash costs Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
All-in sustaining costs (AISC) Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
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Operating Costs:

Units20222021
OP mining costs ($/t mined) USD 2.7  2.71  
Processing costs ($/t milled) USD  ......  Subscription required  ......  Subscription required
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Financials:

Units202320222021
Revenue M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Pre-tax Income M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required
After-tax Income M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required
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Water Supply
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Proposed Heavy Mobile Equipment as of November 3, 2017:
HME TypeSizeQuantityLeased or
Contractor
Dozer 384 kW ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
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Mine Management:

Job TitleNamePhoneEmailProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 27, 2023
....................... Subscription required ....................... Subscription required Subscription required Nov 27, 2023
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....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Oct 24, 2023
....................... Subscription required ....................... Subscription required Subscription required Nov 27, 2023
....................... Subscription required ....................... Subscription required Subscription required Nov 27, 2023
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Staff:

Total WorkforceYear
Subscription required 2020

Corporate Filings & Presentations:

DocumentYear
Annual Report 2023
Corporate Presentation 2023
Mine Operations Plan 2023
Quarterly Report 2023
Technical Report 2023
Year-end Mineral Reserves 2023
Annual Report 2022
Corporate Presentation 2022
Financial Review 2022
Quarterly Report 2022
Sustainability Report 2022
Year-end Mineral Reserves 2022
Year-end Mineral Reserves 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
Annual Report 2018
Corporate Presentation 2018
Corporate Presentation 2018
Feasibility Study Report 2017
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