Prognostication of Kimberlites in Parts of Eastern Dharwar Craton: Inferences Through Aeromagnetic Signatures

G. Ramadass; A.Subhash Babu; M. Preeti

Volume : V, Issue : II, February - 2015

Prognostication of Kimberlites in Parts of Eastern Dharwar Craton: Inferences Through Aeromagnetic Signatures

G. Ramadass, A. Subhash Babu, M. Preeti

Abstract :

Aeromagnetic data, covering 1999 Sq.km of Mahabubnagerand Gulbarga districts of Telangana and Karnataka states in the Eastern Dharwarcraton,India to evaluate the structural configuration of the region. From IGRF corrected magnetic data,RTP(Reduction to pole), Horizontal (X and Y direction), Vertical and Total (analytical signal) gradient maps, several lineaments trending in three major directions NE&ndash;SW, NW&ndash;SE and E&ndash;W were identified. The Zones of intersection of these structural trends which could have acted as potential sites for kimberlites emplacement were accordingly delineated at 21 locations (AA1,BB1to BB5,CC1 to CC2,DD1toDD2, EE1, FF1, GG1to GG3,HH1to HH3 and II1). We calculated depth of prognosticatedkimberlitezones through Euler Deconvolution and Power spectrummethods and magnetic interface in the region was obtained using GM&ndash;Sys Inversion modeling of 21 profiles.The inferred magnetic interface is exhibiting V&ndash;shaped/ caret type structure.