Patterns of Occurrence of Kimberlite Pipes Based on Gravity and Magnetic Anomalies in Wajrakarur-Lattavaram Region, Andhra Pradesh

Kimberlite pipes of Wajrakarur-Lattavaram region in Andhra Pradesh follow some definite patterns depending on regional geology, structure and tectonics. The lithotectonic units with contrasting physical properties often find expression in geophysical measurements. Although direct detection of buried kimberlite pipes by geophysical methods is often difficult, judicious integration of geology, tectonics, and geophysics may suggest favourable zones for detailed investigations.

Based on the distribution of 13 kimberlite pipes discovered so far in the Wajrakarur-Lattavaram region, and on the regional and residual Bouguer gravity and residual magnetic maps derived by a finite element approach, we have attempted to recognize patterns of occurrence of kimberlite pipes. A few potential regions are identified mainly at the intersections of the NE-SW trending faults and the contacts of granites and country rocks.