Abstract

The varied nature of geophysical signatures encountered in the identification of blocks with favorable setting for emplacement of kimberlites, the major geological hosts of diamonds, has resulted in the development of different criteria for their prognostication. This paper attempts to bring out the association of domal morpho-structural features with kimberlite occurrences. From analysis of an IRS-ID LISS-III satellite image of the Maddur-Narayanpet-Mahboobnagar-Gadwal-Raichur region (latitudes 16° N to 17°15’ N and longitudes 77° E to 78°15’ E) in the eastern Dharwar craton, the surface morphology and structural configuration were obtained. From observed surface correlation of reported kimberlite occurrences with intersecting lineaments within regions of domal morphology, regions with such configuration were delineated as potential kimberlite bearing zones. Using this observation as a criterion, six potential kimberlite zones were delineated: near Sedam, around Maddur, north of Mahbubnagar, north of Raichur, between Raichur and Gadwal and around Gadwal.

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