Vermiculite in the Gopalpura Area, Karnataka - A Mineralogical Study

K. N. Prakash Narasimha; Krishnaveni; P. S. R. Prasad; H. Ramalingaiah; J. S. Venu Gopal

Vermiculite in the Gopalpura Area, Karnataka - A Mineralogical Study

K. N. Prakash Narasimha ¹, Krishnaveni ¹, P. S. R. Prasad ², H. Ramalingaiah ¹, J. S. Venu Gopal ³

Affiliations
1 Department of Geology, University of Mysore, Mysore - 570 006, India
2 M P D, N G R I, Hyderabad-500 007, India
3 Center for Neo-Ecofriendly Studies and Training, Mysore, India

Vermiculite mineralization in the Gopalpura area, Karnataka in the Archean supracrustal rocks of the Sargur Group occurs as discontinuous lenses and pockets within the ultramafic rock and at the contact with acid intrusives. Detailed mineralogy as studied using microscopy, X-Ray diffraction, infrared spectroscopy, differential thermal analyses, and electron microprobe analyses are presented. The probable origin of the vermiculite from biotite through hydrobiotite is discussed.