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Petrogenesis of granitoid rocks at the northern margin of the Eastern Ghats Mobile Belt and evidence of syn-collisional magmatism |
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| Authors: | |
| Institution: | (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. |
| Keywords: | Eastern Ghats Singhbhum craton enclaves different protoliths collisional magmatism |
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