Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

A. V. Murali ¹, P. B. Pawaskar ¹, G. R. Reddy ¹, K. V. Subbarao ², V. N. Vasudev ³, M. Sankar Das ¹

Affiliations
1 Analytical Chemistry Division, Bhabha Atomic Research Centre, Trombay, Bombay-400085, IN
2 Geology Department, Indian lnstitute of Technology, Powai, Bombay-400 076, IN
3 Chitradurga Copper Company, 16, Ali Asker Road, Bangalore-560052, IN

Abstract

No Abstract.

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P. B. Pawaskar ¹, B. S. Manerkar ¹, M. Sankar Das ¹

Affiliations
1 Analytical Chemistry Division, BARC, Bombay 400085, IN

Abstract

No Abstract.

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S. G. Viladkar ¹, R. Ramesh ², R. K. Avasia ¹, P. B. Pawaskar ³

Affiliations
1 Department of Geology, St. Xavier's College, Mumbai - 400 001, IN
2 Physical Research Laboratory, Navrangpura, Ahmedabad - 380 009, IN
3 Bhabha Atomic Research Centre, Trombay, Mumbai, IN

Abstract

It is noteworthy that Amba Dongar carbonatite complex has both intrusive and extrusive phase carbonatites. The stratified tuff with components of both carbonatite and nephelinite have been recently traced in western part of Amba Dongar complex. In this preliminary report we present trace and rare earth elements data and C and O isotopes of these tuffs. The C and O isotopes of the least altered tuff falls within the mantle box while the remaining samples plot in the narrow field of 16-20% in oxygen. These values are explained using simple model of water-Rock interaction.

Keywords

Carbonatites, Extrusive Phase, Amba Dongar, Gujarat.

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