Ahafo gold mine in Ghana is owned Newmont Mining, one of the world’s largest gold mining company. The Ahafo mine is located in the Brong Ahafo region of west-central Ghana west africa, about 30 km south of Sunyani and 307 km northwest of the capital city of Accra. Gold mine production in Ahafo started 2006 and in 2010, produced 545,000 oz of gold at a cost of $450/oz. Ahafo has two primary ore zones: Ahafo South and Ahafo North. Mining is currently underway at Ahafo South.
Ahafo gold mine’s property covers three segments of the granodiorite - metasediment contact. Gold mineralisation is generally associated with a brecciated and hydrothermally altered shear-zone of granodiorite lying in thrust/wrench contact with underlying graphitic phyllites of the Birimian Supergroup. The phyllities also contain scattered pods of gold mineralisation, but these appear to be limited to a zone lying no more than 20 m from the granodiorite. The thrust contact always dips east at angles varying from 30° to 65°. Gold mineralisation is also associated with a shear zone about 1.2 km east of the granodiorite - metasediment contact that was expressed by a low-level soil geochemical target. The granodiorite hosted shear zone is subparallel to the main trend and dipping from 60° east to sub-vertical.
Mining Operations And Mining Methods In Ahafo Mine In Ghana
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