Abstract
The Indian peninsula is considered as stable land in view of seismotectonics. However, the Narmada-Son Lineament divides the peninsula into northern and southern parts of Central India. The present study is carried out in Mahakoshal and Chottanagpur Granite Gneiss Complex which were deposited within Narmada-Son lineaments. The positive gravity anomalies strike parallel to the course of the river Son-Narmada and Tapti lineaments, moreover, elliptical positive gravity anomaly shows its concentration in area around the Jabalpur (Madhya Pradesh). Besides, the above said areas also show moderate to high seismic velocities. In addition to these, the area shows steep gradient of seismic anomaly and lower value of heat flow around Son-Narmada and Tapti lineaments. These anomalies appear to support the upwelling of Moho towards the surface. This kind of shifting of Moho towards surface may cause the tectonic rejuvenation and multiple reactivations of faults and shear zones which discord the concept of seismotectonic stability status of the area, hence time to time seismotectonic activities have been observed in these areas.
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