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