Overview
| Stage | Production |
| Mine Type | Open Pit |
| Commodities |
|
| Mining Method |
|
| Production Start | ...  |
Source:
p. 1
| Company | Interest | Ownership |
|
Government of Guinea
|
15 %
|
Indirect
|
|
AngloGold Ashanti Ltd.
|
85 %
|
Indirect
|
|
Societe Ashanti Goldfields de Guinee SA
(operator)
|
100 %
|
Direct
|
Siguiri in Guinea is 85% owned by AngloGold Ashanti and 15% by the government of Guinea.
Contractors
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Deposit Type
- Vein / narrow vein
- Orogenic
Summary:
The Siguiri orebodies are early Proterozoic orogenic quartz-vein hosted deposits located in the Siguiri Basin of West Africa. Generally poorly exposed, the basin sediments have been subject to greenschist facies metamorphism and consist of a well-bedded turbiditic sedimentary sequence, with some brecciated and possibly volcanic members. Mineralisation also occurs as secondary gold in alluvial and colluvial gravels in laterite cover.
Three main sedimentary packages are recognised in the Siguiri district, the Balato, Fatoya and Kintinian formations. The Balato Formation is dominated by centimeter scale alternations of shale-siltstone and greywacke. The overlying Fatoya Formation consists of meter scale beds of greywacke fining towards the west. The Kintinian Formation is a thick package of shale and sandstone with a basal clast-supported conglomerate.
The orebodies are structurally controlled and the area has undergone at least three distinct phases of deformation, with initial N-S compression developing minor folds, the second and largest deformation event is associated with E-W to ENE WSW directed compression leading to N-S structural architecture, and the third event was a NW-SE compression that led to refolding of existing structures.
A deep oxidation (weathering) profile is developed in the region, varying between 50m to 150m. The mineralised saprolite currently provides the main oxide feedstock for the CIP processing plant, although a new ........
Summary:
Siguiri is currently a multi-pit fresh rock and oxide gold mining operation, mined by contract miner, Mota-Engil. The mining method is selective conventional mining using excavators and trucks on 3m high flitches. Three Caterpillar 6020B excavators are the main loading equipment matched with Caterpillar 777G dump trucks. In some deposits, a selective mining unit (SMU) of 10 x 10 x 3m has been defined based on historical grade control, the deposit type, and the mining equipment used to simulate the expected mining dilution and ore losses.
Source:
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Source:
Summary:
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Reserves at December 31, 2021:
Reserves cut-off grades vary from 0.65 g/t Au to 1.20 g/t Au depending on deposit and ore type.
| Category | Tonnage | Commodity | Grade | Contained Metal |
|
Proven & Probable
|
67.72 Mt
|
Gold
|
0.75 g/t
|
1.64 M oz
|
|
Total Resource
|
193.04 Mt
|
Gold
|
1.03 g/t
|
6.38 M oz
|
Corporate Filings & Presentations:
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