The main sulfide minerals in the gold-sulfide disseminated ores are arsenopyrite, pyrite and pyrrhotite, and to a very minor extent, sphalerite and tetrahedrite. Carbonate …
Two economic styles of mineralization occur at Obuasi and contribute equally to the gold budget. These are (1) gold-bearing sulfides, dominantly arsenopyrite, mainly …
Textural observations indicate the early formation of abundant arsenopyrite, followed by pyrite, with chalcopyrite, galena, sphalerite and pyrrhotite occurring as inclusions within pyrite and altered arsenopyrite.
The granite- hosted gold mineralisation is free milling and occurs in two to three generations of abundant, narrow quartz veining associated with up to 3% pyrite, lesser …
Gold in Early Proterozoic Birimian greenstone at Prestea in Ghana is associated with base metal sulphides and sulphosalts including arsenopyrite, pyrite, sphalerite, chalcopyrite, …
In southwest Ghana, Oberthuer et al. (1996) have shown that one of the four major types of gold mineralization in Ashanti belt is associated with auriferous …
Gold mineralisation occurs as micron-sized gold inclusions of approximately 2 μm (Figure 4(a-b)) and larger gold grains within fractures of euhedral …
high grade native gold hosted in quartz veins was sourced from the arsenopyrite mineralisation.
The world-class Obuasi gold deposit, Ghana, has gold-rich arsenopyrite spatially associated with quartz veins, which have extremely high, localised …
LA-ICP-MS analysis, SEM imagery, detailed mineralogical studies coupled with EMP analysis, indicate that the occurrence of gold in the Bepkong deposit is in …