Overview
| Stage | Production |
| Mine Type | Open Pit |
| Commodities |
|
| Mining Method |
|
| Processing |
- Heap leach
- Carbon adsorption-desorption-recovery (ADR)
- Solvent Extraction & Electrowinning
- Cyanide (reagent)
|
| Mine Life | 10 years (as of Jan 1, 2017) |
Source:
p. 58, 380
Bissa Gold SA, which owns the Bouly mine, is 90% owned by Nordgold through High River Gold Mines Ltd. and 10% state owned (under law).
Deposit Type
- Porphyry
- Vein / narrow vein
Summary:
Bouly, which lies to the southeast of Bissa, appears to represent a large, low grade goldcopper porphyry.
The bedrock comprises massive non-foliated porphyritic mafic metavolcanics, brecciated by younger porphyritic intrusive dykes and gold is associated with quartz-pyrite-chalcopyrite veinlets with potassic alteration along the vein walls.
Summary:
Bouly is a single open pit operation.It will benefit from the low cost mining operations due to an excellent average LOM stripping ratio of 0.7 t/t.
Processing Technologies
- Heap leach
- Carbon adsorption-desorption-recovery (ADR)
- Solvent Extraction & Electrowinning
- Cyanide (reagent)
Summary:
The Bouly deposit represents a large, low-grade gold mineralisation, favourable for heap leach treatment. Bouly is a single open pit operation. The ore is crushed with primary jaw and secondary cone crushers, followed by agglomeration before stacking on HDPE lined pad for irrigation with sodium cyanide leach solution. Bouly utilises mining equipment and jaw crushers similar to that of Bissa, to standardise stock holding and optimise maintenance costs.
Bouly has its own all-season heap leach facilities with final processing stages, including desorption, electro-winning and smelting taking place at the Bissa’s processing plant.
Recoveries & Grades:
| Commodity | Parameter | 2016 |
|
Gold
|
Recovery Rate, %
| 83 |
|
Gold
|
Head Grade, g/t
| ......  |
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Production:
| Commodity | Units | 2017 | 2016 | Avg. Annual (Projected) |
|
Gold
|
koz
| ...... | ...... | 120 |
All production numbers are expressed as metal in doré.
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Operational Metrics:
| Metrics | 2016 |
|
Ore tonnes mined
| 3,518 kt |
|
Stripping / waste ratio
| 1.46 |
|
Tonnes processed
| 3,292 kt of ore |
Reserves at December 31, 2017:
| Category | OreType | Tonnage | Commodity | Grade | Contained Metal |
|
Proven
|
In-Situ (OP)
|
10,974 kt
|
Gold
|
0.51 g/t
|
180 koz
|
|
Probable
|
In-Situ (OP)
|
90,405 kt
|
Gold
|
0.52 g/t
|
1,516 koz
|
|
Proven & Probable
|
In-Situ (OP)
|
101,379 kt
|
Gold
|
0.52 g/t
|
1,696 koz
|
|
Measured
|
In-Situ (OP)
|
9,940 kt
|
Gold
|
0.57 g/t
|
182 koz
|
|
Indicated
|
In-Situ (OP)
|
196,999 kt
|
Gold
|
0.55 g/t
|
3,471 koz
|
|
Measured & Indicated
|
In-Situ (OP)
|
206,940 kt
|
Gold
|
0.55 g/t
|
3,653 koz
|
|
Inferred
|
In-Situ (OP)
|
58,359 kt
|
Gold
|
0.59 g/t
|
1,109 koz
|
|
Total Resource
|
In-Situ (OP)
|
265,299 kt
|
Gold
|
0.56 g/t
|
4,762 koz
|
Commodity Production Costs:
| | Commodity | Units | 2016 |
|
Selling price
|
Gold
|
USD
|
...... 
|
Financials:
| | Units | 2016 |
|
Revenue
|
M USD
| ......  |
Mine Management:
| Job Title | Name | Profile | Ref. Date |
|
.......................
|
.......................
|
|
Aug 14, 2019
|
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Aerial view:
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