Click here to view fulltext PDF

Permanent link:
https://www.ias.ac.in/article/fulltext/jess/113/04/0543-0563

Eastern Ghats; Singhbhum craton; enclaves; different protoliths; collisional magmatism

The northern margin of the Eastern Ghats Mobile belt against the Singhbhum craton exposes granitic rocks with enclaves from both the high-grade and low-grade belts. A shear cleavage developed in the boundary region is also observed in these granitoids. Field features and petrography indicate syn-tectonic emplacement of these granitoids. Petrology-mineralogy and geochemistry indicate that some of the granitoids are derived from the high-grade protoliths by dehydration melting. Others could have been derived from low-grade protoliths. Moreover, microstructural signatures in these granitoids attest to their syn-collisional emplacement.

S Bhattacharya¹ Rajib Kar² S Moitra¹

1. Indian Statistical Institute, 203 B.T. Road, Kolkata - 700 108, India
2. Department of Geology, J.K. College, Purulia - 723 101, India

Published

December 2004