Geophysical Signatures of Kuilapal Granite, Singhbhum, India and their Significance

Granites having large depth extent indicated by negative Bouguer gravity anomalies are sought for, because they playa crucial role in the formation of uranium provinces by mobilising the radioelements from mantle or deeper parts of crust by hydrothermal convection generated as a result of radioactiv e decay in the pluton. The Bouguer gravity data reveals that the Kuilapal granite has a large depth extent, extending to 20 km into the crust and the margins of this granitoid are distinguished by doughnutshaped magnetic features intimately associated with radiometric anomalies. Such geophysical signatures arc interpreted to qualify this granite as 'mineralised'.