Overview
Stage | Production |
Mine Type | Open Pit |
Commodities |
|
Mining Method |
|
Processing |
- Intensive Cyanidation Reactor (ICR)
- Gravity separation
- Smelting
- Centrifugal concentrator
- Carbon re-activation kiln
- Dewatering
- Agitated tank (VAT) leaching
- Concentrate leach
- Carbon in leach (CIL)
- AARL elution
- Solvent Extraction & Electrowinning
- Cyanide (reagent)
|
Mine Life | 8 years (as of Jan 1, 2021) |
First gold was poured at Yaouré in December 2020, and Commercial Production was declared on 31 March 2021. |
Latest News | Perseus Discovers More High-Grade Gold at Yaouré Mine April 12, 2022 |
Source:
p. 29
Company | Interest | Ownership |
Government of Côte d’Ivoire
|
10 %
|
Indirect
|
Perseus Mining Ltd.
|
90 %
|
Indirect
|
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.
Summary:
The Yaouré Deposit is a structurally controlled, greenstone hosted gold deposit similar in nature to many exploited elsewhere in the Birimian terranes of West Africa.
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.
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.
Summary:
The chosen method of mining is conventional open pit mining utilising hydraulic excavators and trucks, mining bench heights of 5 m with 2.5m flitches to minimise ore loss and waste rock dilution.
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 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 m was generally applied to the pit designs.
Flow Sheet:
Crusher / Mill Type | Model | Size | Power | Quantity |
Jaw crusher
|
|
|
|
1
|
Pebble crusher
|
|
|
|
1
|
SAG mill
|
|
|
|
1
|
Ball mill
|
|
|
|
1
|
Processing
- Intensive Cyanidation Reactor (ICR)
- Gravity separation
- Smelting
- Centrifugal concentrator
- Carbon re-activation kiln
- Dewatering
- Agitated tank (VAT) leaching
- Concentrate leach
- Carbon in leach (CIL)
- AARL elution
- Solvent Extraction & Electrowinning
- Cyanide (reagent)
Flow Sheet:
Summary:
The Yaouré processing plant uses crushing, grinding, gravity and cyanide leaching to extract gold. The plant has a nominal capacity of 3.5Mtpa. The technology used in the processing plant is well proven, and the plant has been operating successfully since November 2020.
Recoveries & Grades:
Commodity | Parameter | 2021 |
Gold
|
Recovery Rate, %
| ......  |
Gold
|
Head Grade, g/t
| ......  |
Production:
Commodity | Units | 2022 | 2021 | LOM (Projected) |
Gold
|
oz
| ...... ^ | ......  | 1,367,000 |
All production numbers are expressed as metal in doré.
^ Guidance / Forecast.
Operational Metrics:
Metrics | 2021 |
Total tonnes mined
| ......  |
Ore tonnes mined
| ......  |
Tonnes milled
| ......  |
Stripping / waste ratio
| ......  |
Plant annual capacity
| ......  |
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Reserves at June 30, 2021:
The cut-off grade of 0.4g/t Au for the stated open pit Mineral Resource.
Category | Tonnage | Commodity | Grade | Contained Metal |
Proven
|
0.5 Mt
|
Gold
|
0.95 g/t
|
14 koz
|
Probable
|
29.2 Mt
|
Gold
|
1.72 g/t
|
1,618 koz
|
Proven & Probable
|
29.6 Mt
|
Gold
|
1.71 g/t
|
1,632 koz
|
Measured
|
0.5 Mt
|
Gold
|
0.95 g/t
|
14 koz
|
Indicated
|
50.9 Mt
|
Gold
|
1.34 g/t
|
2,196 koz
|
Measured & Indicated
|
51.3 Mt
|
Gold
|
1.34 g/t
|
2,209 koz
|
Inferred
|
47 Mt
|
Gold
|
1.1 g/t
|
1,730 koz
|
Commodity Production Costs:
| Commodity | Units | 2021 |
Cash costs
|
Gold
|
USD
|
......
|
Total cash costs
|
Gold
|
USD
|
......
|
All-in sustaining costs (AISC)
|
Gold
|
USD
|
......
|
^ Guidance / Forecast.
- Subscription is required.
Operating Costs:
| Units | 2021 |
OP mining costs ($/t mined)
|
USD
| 2.71 |
Processing costs ($/t milled)
|
USD
| ......  |
- Subscription is required.
Financials:
| Units | 2021 |
Revenue
|
M USD
| ......  |
Pre-tax Income
|
M USD
| ......  |
After-tax Income
|
M USD
| ......  |
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Corporate Filings & Presentations:
Document | Year |
...................................
|
2021
|
...................................
|
2021
|
...................................
|
2021
|
...................................
|
2021
|
...................................
|
2021
|
...................................
|
2020
|
...................................
|
2020
|
...................................
|
2020
|
...................................
|
2020
|
...................................
|
2020
|
...................................
|
2019
|
Annual Report
|
2018
|
Corporate Presentation
|
2018
|
Corporate Presentation
|
2018
|
Feasibility Study Report
|
2017
|
- Subscription is required.
News:
News | Date |
Perseus Discovers More High-Grade Gold at Yaouré Mine
|
April 12, 2022
|
Perseus Mining Ltd.: High Grade Results Continue at Yaouré Gold Mine
|
January 18, 2022
|
Positive Exploration Results at Perseus’s Yaouré Mine
|
October 13, 2021
|
Perseus Mining Updates Yaouré Life of Mine Plan
|
August 24, 2021
|
Exploration Success for Perseus in Côte d’Ivoire
|
April 6, 2021
|
Perseus Pours First Gold at Yaouré Five Weeks Ahead of Schedule
|
December 17, 2020
|
Perseus to advance gold production with EPSA contract
|
December 11, 2019
|
Perseus Mining to Commence Development of the Yaouré Gold Mine in Côte D’ivoire
|
May 5, 2019
|
Perseus Mining Receives Exploitation Permit to Develop the Yaouré Gold Mine in Côte D’Ivoire
|
April 25, 2019
|
Perseus Mining Limited: Yaouré Exploitation Permit Update
|
April 10, 2019
|
Perseus awards Lycopodium $132m Yaouré contract
|
January 11, 2019
|
Aerial view:
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