Mineral Exploration Corporation Limited (MECL) has brought to finality a number of gold prospects and Resources since 1980 in different parts of the country. Gold mineralisation occurs in diverse geological settings cutting across time scale with specific peaks. One such peak is the Neoarchaean period when globally many gold deposits were formed in greenstone belts. Mesoarchaean and Proterozoic Periods too are known for significant gold mineralisation. In India, gold mineralisation is found in the Archaean greenstone/schist belts, granitoids adjacent to greenstone belt, Proterozoic Fold Belts and in the Southern Granulite Terrain. Mineralisation of both primary and secondary types occur. Primary mineralisation is both syngenetic and epigenetic in nature. Primary mineralisation may develop in any rock type but metabasalt account for most production. Mineralisation occurs in diverse structural settings. Shear zones are the major control of mineralisation. Fold closures are also favourable locales for mineralisation. Mineralised zones occurring in greenschist to amphibolite facies metamorphic terrains are always marked by retrogression. Wall rock alteration and geochemical changes associated with mineralisation are indicative of hydrothermal activity.Secondary mineralisation of lateritic and placer types also occurs in different parts of the country. In addition to primary mineralisation, secondary gold in laterites is common in the Southern Granulite Terrain. Detailed exploration by MECL has eventually led to delineation of gold Resources in Yerrappa-Gantalappa block, Ramagiri schist belt; Chigargunta and Old Bisanatham blocks in Kolar schist belt, Uti block in Hutti-Maski schist belt and Kunderkocha block in Gorumahisani ?Badampahar belt. Uti block is under active mining by opencast method whereas mining in other blocks is suspended. Dona East block in Jonnagiri schist belt and Sangli and adjacent blocks in the Gadag schist belt are in the hands of private sector for further development. Pahardia and Parasi blocks in the Singhbhum Proterozoic Fold Belt have been successfully auctioned by the government to private investors. The paper presents the salient features of completed and ongoing investigations for gold by MECL in different geological terrains in the country. With vast experience in the field of exploration with updated infrastructure under a single umbrella, besides a team of professional geoscientists, MECL is fully equipped to offer integrated multi-disciplinary services for carrying out exploration for gold and other minerals within India and abroad.
Current Status of Exploration and Resources of Gold in India: Review of Prospect-Wise Resources Defined by MECL
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Mineral Exploration Corporation Limited (MECL) has brought to finality a number of gold prospects and Resources since 1980 in different parts of the country. Gold mineralisation occurs in diverse geological settings cutting across time scale with specific peaks. One such peak is the Neoarchaean period when globally many gold deposits were formed in greenstone belts. Mesoarchaean and Proterozoic Periods too are known for significant gold mineralisation. In India, gold mineralisation is found in the Archaean greenstone/schist belts, granitoids adjacent to greenstone belt, Proterozoic Fold Belts and in the Southern Granulite Terrain. Mineralisation of both primary and secondary types occur. Primary mineralisation is both syngenetic and epigenetic in nature. Primary mineralisation may develop in any rock type but metabasalt account for most production. Mineralisation occurs in diverse structural settings. Shear zones are the major control of mineralisation. Fold closures are also favourable locales for mineralisation. Mineralised zones occurring in greenschist to amphibolite facies metamorphic terrains are always marked by retrogression. Wall rock alteration and geochemical changes associated with mineralisation are indicative of hydrothermal activity.Secondary mineralisation of lateritic and placer types also occurs in different parts of the country. In addition to primary mineralisation, secondary gold in laterites is common in the Southern Granulite Terrain. Detailed exploration by MECL has eventually led to delineation of gold Resources in Yerrappa-Gantalappa block, Ramagiri schist belt; Chigargunta and Old Bisanatham blocks in Kolar schist belt, Uti block in Hutti-Maski schist belt and Kunderkocha block in Gorumahisani ?Badampahar belt. Uti block is under active mining by opencast method whereas mining in other blocks is suspended. Dona East block in Jonnagiri schist belt and Sangli and adjacent blocks in the Gadag schist belt are in the hands of private sector for further development. Pahardia and Parasi blocks in the Singhbhum Proterozoic Fold Belt have been successfully auctioned by the government to private investors. The paper presents the salient features of completed and ongoing investigations for gold by MECL in different geological terrains in the country. With vast experience in the field of exploration with updated infrastructure under a single umbrella, besides a team of professional geoscientists, MECL is fully equipped to offer integrated multi-disciplinary services for carrying out exploration for gold and other minerals within India and abroad.
Publication Mode |
Online |
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Publication Author |
* |
Publication Language |
English |
Publication Type |
Conference Paper |
Publication Year |
2021 |
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