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Authors
Affiliations
1 Department of Studies in Earth Science, University of Mysore, Manasagangotri, Mysore-570006, IN
2 Department of Studies in Geology, Karnatak Science College, Dharwad, Karnataka, IN
Source
International Journal of Earth Sciences and Engineering, Vol 9, No 1 (2016), Pagination: 150-156
Abstract
The vermiculite in its macroscopic form occurs associated with the mafic rocks in the vicinity of the acidic intrusions around Ajjampalli area in the Kolar schist belt in south India. Mafic rocks form part of the ancient supracrustals and belong to Sakarsanahalli association in the Kolar schist belt of Eastern Dharwar craton. The study area is covered in the Survey of India toposheet 57L/1 and lies between the 12058’ latitude and 78014’ longitude. The present study forms the first detailed investigation of the occurrence of the macroscopic vermiculites in the Ajjampalli area in Kolar schist belt. The study involves field and Petrographic features linked with the mineral chemistry aspects to understand the genesis of vermiculites. XRD, TGA and FTIR techniques have been used to characterize the vermiculites of the study area. The formation of vermiculite in the study area is attributed to the hypogene process followed by epigene process through an intermediate stage of hydrobiotite.
Keywords
Vermiculites, Kolar Schist Belt, Eastern Dharwar Craton, Hydrobiotite.
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