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Both parts of the Dharwar Craton, the Western (WDC) and the Eastern (EDC), house a number of schist belts. Many of these schist belts, such as the Kolar schist belt, Hutti schist belt, Chitradurga schist belt and the Gadag schist belt, are auriferous. In such schist belts, gold occurs in association with sulphides such as pyrite, pyrrhotite, arsenopyrite, and chalcopyrite. Gold mineralization in these belts is found to occur in different lithologies. The Gadag schist belt is composed dominantly of metabasalt in its western half and metasediments in the eastern half. Quartz-carbonate veins are observed to cut across these lithologies as well as the banded iron formations (BIFs). This paper aimed to study the gold mineralization in different lithologies of the Gadag schist belt and found that metabasalts and BIFs are the dominant rocks hosting gold. It is also observed that the mineralization is strata bound. Gold concentration varies from < 21 to < 26 ppb (parts per billion).

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Gold Mineralization and Their Lithological Controls at Nagavi Area, Gadag Schist Belt, in Karnataka, India

  • 会议论文

  • 发表日期：

    2025年

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  • Chandrashekharappa Agasnalli,
  • M. S. Deepak,
  • Anupkumar G. Ekbote,
  • T. K. Lakkundi

摘要

Both parts of the Dharwar Craton, the Western (WDC) and the Eastern (EDC), house a number of schist belts. Many of these schist belts, such as the Kolar schist belt, Hutti schist belt, Chitradurga schist belt and the Gadag schist belt, are auriferous. In such schist belts, gold occurs in association with sulphides such as pyrite, pyrrhotite, arsenopyrite, and chalcopyrite. Gold mineralization in these belts is found to occur in different lithologies. The Gadag schist belt is composed dominantly of metabasalt in its western half and metasediments in the eastern half. Quartz-carbonate veins are observed to cut across these lithologies as well as the banded iron formations (BIFs). This paper aimed to study the gold mineralization in different lithologies of the Gadag schist belt and found that metabasalts and BIFs are the dominant rocks hosting gold. It is also observed that the mineralization is strata bound. Gold concentration varies from < 21 to < 26 ppb (parts per billion).