Basement Structure Below the Coastal Belt of Krishna-Godavari Basin: Correlation Between Seismic Structure and Well Information

Seismic refraction modeling integrating the litholog data now available from the deep wells recently drilled by the Oil and Natural Gas Corporation (ONGC) indicates large subcrop extensions of the Rajahmundry Traps correlated with the Deccan volcanism along the coastal belt of Krishna-Godavari basin, India. It is suggested that the Rajahmundry Traps were erupted through a volcanic vent or a zone of basement faults along the present East Coast, possibly in and around Razole. The extensive development of the Rajahmundry Traps also implies that the mantle plume responsible for the Deccan volcanism had such large dimensions that matched or transcended the dimensions of the Indian Peninsular Shield.