Auriferous mineralization in the Sakoli Group, central India, with particular reference to sulphide-bound gold

Autor: K. K. Deepa, B. Jose, S. M. S. Sreehari, A. S. Venkatesh, T. Mishra
Rok vydání: 2001
Předmět:
Zdroj: Applied Earth Science. 110:103-109
ISSN: 1743-2758
0371-7453
DOI: 10.1179/aes.2001.110.2.103
Popis: Gold mineralization in the Pular-Parsori-Thutanbori belt of the Sakoli Group in central India is hosted predominantly by a felsic volcanic suite of rocks and is associated with quartz-sulphide ±carbonate veins. Both free and submicroscopic or invisible forms of latticebound gold occur. The free gold is found within the shear zone, as either disseminated or fracture-controlled grains within sulphides. Major opaque minerals in this gold-bearing belt include arsenopyrite, pyrrhotite, pyrite, chalcopyrite, sphalerite, galena, molybdenite, magnetite, hematite and scheelite. A three-stage paragenesis been established for these minerals.Mineral chemical analyses of the sulphides reveal the presence of sulphide-bound gold within the belt—the first time such occurrences have been identified in central India. Quantitative spot analyses of individual grains of sulphide indicate high concentrations of lattice-bound gold, which scanning electron micrographs show to be heterogeneously distributed. The substitut...
Databáze: OpenAIRE