Delineation of subsurface geological fractures in the Cambay rift and surrounding regions of NW India: an integrated approach using satellite derived EIGEN-6C4 gravity data
Avinash Kumar Chouhan, Dinesh Singh, Sanjit Kumar Pal, Pallabee Choudhury
Abstract
The Cambay rift (CR) is a rich petroleum province of north-western India and extensively studied for petroleum exploration and mapping the sub-surface structure through various geophysical studies. However, the CR is not studied so far towards mapping the geological structures, like faults/lineaments and estimating their source depths. In the present study, the lineaments in the CR have been delineated and their source depths are estimated using satellite-derived EIGEN-6C4 gravity data, though different modern processing techniques (Total Horizontal Derivative (THD), Analytical Signal (AS), Tilt Derivative (TDR) and Euler deconvolution). The majority of the identified lineaments are trending in NW-SE and NE-SW direction and their source depths range between 4.4 and 15 km, indicative of shallow subsurface features in this area. This study provides an updated tectonic map, which offers a better understanding of the structural framework and tectonic setting of the area.