Analyses of Ground Magnetic Anomalies Over a Part of Vindhyan Basin around Damoh and Jabalpur Districts, Madhya Pradesh

Detailed ground magnetic survey over a part of the Vindhyan basin around Damoh and Jabalpur (40 km either sides of Hirapur-Mandala DSS profile) has been carried out. The magnetic field anomaly map is characterised by dense contours in trap covered areas near Jabalpur where as the Vindhyans show sparsely distributed contours with several lows. Spectrum analysis of total ground magnetic field anomalies reveals the average thickness of Vindhyans to be 3.9 km and depth of Conrod to be 15km. The average thickness of Vindhyans is in conformity with the Deep Seismic Sounding results of the region. The thickness of Vindhyan sediments along four profiles ranges from 1.5km to 5km. The maximum thickness of Vindhyan sediments at Jabera has been derived to be 4.8km which is close to the results of Oil and Natural Gas Corporation Ltd., Dehradun.