Geological setting of the Wassa gold deposit, SW Ghana

Abstract : Including past production, current indicated and inferred resources, Wassa is a 5 Moz poly-deformed early-orogenic gold deposit located on the eastern flank of the Ashanti Belt, in southwest Ghana. It is hosted by metamorphosed volcanic, intrusive and sedimentary rocks of the Sefwi Group (ca. 2260–2160 Ma). Early mineralization has an Eoeburnean age (2164 ± 22 Ma, Re–Os on pyrite) and is characterized by quartz veins, by a carbonate alteration of the host rocks, and by deformed gold-bearing pyrite. Remobilization of this gold occurred during the late stages of the Eburnean Orogeny (~ 2.1 Ga) and is associated with quartz-carbonate veins with visible gold and euhedral pyrites.
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Submitted on : Wednesday, April 20, 2016 - 3:39:37 PM
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Stéphane Perrouty, Mark W. Jessell, Yan Bourassa, John Miller, Daniel Apau, et al.. Geological setting of the Wassa gold deposit, SW Ghana. Ore Geology Reviews, Elsevier, 2015, ⟨10.1016/j.oregeorev.2015.09.024⟩. ⟨hal-01305023⟩

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