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

A. Maheshwari ¹, M. Coltorti ², A. N. Sial ³, G. Mariano ³

Affiliations
1 Department of Geology, University of Rajasthan, Jaipur-302 004, IN
2 Istituto di Mineralogia, Universita di Ferrara, IT
3 Department of Geology, UFPE, Recife, 50.732-970, BR

Abstract

The Malani volcanics of Gurapratap Singh and Din belong to a basalt-andesite -dacite-rhyolite association of Precambrian age. The preponderance of rhyolites over basic and intermediate rocks is a significant feature of the area. The rhyolities are characterised by chemical features, which indicate their A-type affinity. The study rules out their cogeneticity and suggests the crustal involvement in the genesis of Malani rhyolites.

Keywords

Petrology, Oxygen Isotopes, Malani Volcanics, Rajasthan.

Full Text