Palaeomagma Chamber in the Upper Crust - Plausible Secondary Source for the Deccan Basalts of the Satpura Region in Central India

The Satpura ranges of Central India are mostly covered by Deccan Traps. Geophysical signatures over this region have been correlated and a crustal model has been arrived at. The areas of gravity high anomaly zones are characterized by deep depressions in the basement. 2-D gravity modelling studies indicate crustal underplating with magmatic additions in the crustal block. Modelling studies suggest the presence of high density bodies at a depth of 6 km in the gravity high anomaly zones of Khandwa and Tikaria. These bodies in the upper crust can be intermediate palaeomagma chamber/relic magma conduit forming a secondary source for the Deccan Basalts.