The hydrothermal evolution and genesis of the porgera gold deposit, Papua New Guinea
High grade gold mineralization at Porgera is the result of two spatially and temporally distinct mineralization events referred to as stages I and II. Stage I mineralization resulted in the formation of pyrite, Fe-rich sphalerite and galena rich vein sets, spatially associated with intrusions, and hosted in intrusions, the surrounding altered sediment and calcareous black shale. Early sulphide rich veins (A/B veins) contain several grams of Au/tonne but due to their scattered nature do not...[Show more]
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