The Chinnur High - A Geophysical Evidence for Rift-Related Magmatism in the Godavari Basin

The Bouguer gravity anomaly over the Godavan Basin shows a low (of about 50 mGal) within which a localized high of about 30 mGal occurs near Chinnur. This high is also associated with a well-Defined aeromagnetic anomaly of about 300 nT, observed at a height of about 1500 m above mean sea-Level. Interpretation of both gravity and magnetic anomalies reveals the presence of a mafic intrusive at depth that might be responsible for basement uplift in this region. The inferred intrusive supports the presence of volcanic activity associated with the tectonics of the Godavari rift.