Shear-Controlled Gold Mineralization of G. R. Halli Area of Chitradurga Schist Belt, Dharwar Craton: Insights from Fluid Inclusion Study
| Autor: | Govindappa Gopalakrishna, Poorigali Chowdaiah Nagesh, Mohamed Shareef |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Arsenopyrite
010504 meteorology & atmospheric sciences Schist Geochemistry engineering.material 010502 geochemistry & geophysics 01 natural sciences Dharwar Craton Sphalerite Shear (geology) Galena visual_art engineering visual_art.visual_art_medium Pyrite Shear zone Geology 0105 earth and related environmental sciences |
| Zdroj: | Open Journal of Geology. :662-673 |
| ISSN: | 2161-7589 2161-7570 |
| Popis: | Gold mineralization at G. R. Halli is located along the Central shear zone of Chitradurga schist belt, extending from west of Gonur, through east of G. R. Halli and C. K. Halli to east of Honnemardi, roughly parallel to stratigraphic units. The NNW-SSE trending shear zone has a width of 0.5 to 1.5 km shows extensive carbonatization of metabasalts and the associated lithologies confined to NNW-WNW trending arcuate brittle-ductile zone. The sheared and silicified contact zones between carbonaceous argillite and schistose metabasalt form the potential sites for localization of mineralization. The gold is associated with sulphides mainly pyrite, arsenopyrite, galena, sphalerite, minor chalcopyrite. Textural relationship indicates two stage sulphide mineral assemblages co-relatable with two stage fluid ascents having temperature of homogenization between 125°C and 256°C. It is a typical epigenetic lode gold system, which got affected by later deformation. |
| Databáze: | OpenAIRE |
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