Obuasi Gold Mine, Ghana
Key Data:
Producer of
Gold
Location
South-central Ghana
Ownership
AngloGold Ashanti (100%)
Geology type
Gold-bearing veins in Precambrian greenstones
Mineral type
Native gold in quartz veins; gold within arsenopyrite
Reserve base
10.7Mt proven ore (2006)
Annual production
391,000oz Au (2005)
Mining method
Mechanised underground; surface mining and tailings retreatment to be discontinued
Processing method
Four plants treat oxide ore, sulphide ore, tailings and heap-leached ore; sulphide plant utilises bio-oxidation
Employment
6,600
Key Equipment:
Underground
Atlas Copco drilling and loading fleet
Nordic Mining Technology trolley electric system
Clayton locomotives
Atlas Copco Robbins raise-boring equipment
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