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Depth Estimation to the Basement of Vibhutigudda and Taluru formations in the Southeast Fringe of Sandur Schist Belt from Aeromagnetics
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Intense cluster of aeromagnetic anomalies as high as 5000 NT, spread over an area of 10 x 6 sq km were observed in the southeastern fringe of the Sandur Schist Belt (SSB) in Obalapuram-Mincheri-Nemakallu section. Sources for these anomalies are inferred due to the presence of the ferruginous cherts, metagabbros, metabasalts and banded iron formations associated with the Taluru and Vibhutigudda Formations of the schist belt. Computation of analytical signal, analysis of two dimensional power spectrum and magnetic profiles taken from the aeromagnetic data has indicated that: (i) The cluster of anomalies is originating from Taluru and Vibhutigudda Formations, (ii) The estimated depth of 500 m represents the granitic basement and (iii) Absence of Taluru Formation below the Vibhutigudda Formation.
Keywords
Aeromagnetics, Analytical Signal, Power Spectrum, Basement Cover Relationship, Sandur Schist Belt, Kamataka.
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