Kaolinite Occurrence of Kachchh, Gujarat: A Product from Rhyolitic Tuff by Hydrothermal Alteration
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Kaolinite associated with Mesozoic sediments of Kachchh and alkaline igneous rocks are not well studied in view of its genesis. The petrography, EPMA and DTA studies support that the studied kaolinite samples formed by mature transformation from rhyolitic tuff by hydrothermal alteration in epithermal condition. Such postulation indicates that there was intermittent acid volcanic episode along with alkaline basic igneous magmatism in the Cretaceous of Kachchh basin, western part of India.
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The first author is thankful to Dr. M.M. Mukherjee, the then director, Central Petrologial Laboratories, GSI Kolkata and ex-Deputy Director General, GSI, Kolkata for providing necessary laboratory supports and encouragements. The authors are also grateful to the anonymous reviewers for critically reviewing the manuscript and suggesting improvements.
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