Uniformity in sulfur isotope composition in the orogenic gold deposits from the Dharwar Craton,southern India |
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Authors: | C Sakthi Saravanan B Mishra |
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Institution: | (1) Department of Geology & Geophysics, Indian Institute of Technology, Kharagpur, 721302, India |
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Abstract: | The sulfur isotope composition of sulfides (mainly pyrite and arsenopyrite) from gold deposits/prospects of the Dharwar Craton
such as Hutti, Hira-Buddini, Uti, Kolar (Chigargunta), Ajjanahalli, and Jonnagiri has a narrow range (δ34S = +1.1 to +7.1‰). Such craton-scale uniformity of the above gold camps is noteworthy, in spite of the wide diversity in
host rock compositions and their metamorphic conditions, and suggests a magmatic or average crustal source of sulfur for all
deposits studied. In addition, our study points towards gold precipitation from reduced ore fluids, with near-homogeneous
sulfur isotope compositions. |
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Keywords: | Sulfur isotope Archean Lode gold deposits Dharwar India |
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