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Nandy, Sandip
- Lizardite–chrysotile veins from Vempalle Formation of Cuddapah Supergroup, India: a study in fluid–rock interaction
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Authors
Affiliations
1 Geological Survey of India, Khanij Bhavan, Jaipur 302 004, IN
2 Geological Survey of India, Seminary Hills, Nagpur 440 006, IN
3 AD-18/5, Sector-I, Salt Lake City, Kolkata 700 064, IN
4 Geological Survey of India, Dharitri Building, Sector V, Salt Lake City, Kolkata 700 091, IN
1 Geological Survey of India, Khanij Bhavan, Jaipur 302 004, IN
2 Geological Survey of India, Seminary Hills, Nagpur 440 006, IN
3 AD-18/5, Sector-I, Salt Lake City, Kolkata 700 064, IN
4 Geological Survey of India, Dharitri Building, Sector V, Salt Lake City, Kolkata 700 091, IN
Source
Current Science, Vol 122, No 7 (2022), Pagination: 826-839Abstract
Much work has been done on hydrothermal alteration and serpentinization of high-magnesian bulks like dunite or peridotite. In contrast, serpentinization of dolomite has received scant attention. In this study we focus on a system of nearly monomineralic intersecting veins comprising serpentine or epidote or calcite developed within Vempalle dolomite of unmetamorphosed Cuddapah Supergroup of rocks, Eastern Dharwar Craton, India. Our studies show that hydrothermal alteration under moderately low temperature, low pressure and moderate silica activity can lead to extensive serpentinization of the dolomitic host. Development of talc can occur under increased silica activity at similar P–T conditions. We also explore the mechanism of formation of chrysotile veins, epidote veins and calcite veins that transect the lizardite which replaces dolomiteKeywords
Dolomite, fluid–rock interaction, lizardite and chrysotile veins, silica activity.Full Text
References
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