B.V.S.Murthy, B.Madhusudan Rao, A.K. Dubey and Srinivasulu - IGU

B.V.S.Murthy et al.Figure.10. Geophysical Section along Profile –II of Block-III.CONCLUSIONSProspecting manganese is still a puzzle despite thelarge number of geophysical investigations conductedby earlier researchers. This is because of the variedtypes of origin and occurrence controlled by theregional geology. In the Jamda-Koira belt of Singhbhumregion manganese occurs as small lensoids/lumpslocated between highly folded structurallydisturbed phyllitic shales and BHJ/BHQs of Ironore series. The magnetic, electrical resistivity andgravity surveys conducted in 3 blocks suggestedscope for analyzing and assigning causative sourcesfor the anomalies and identifying criteria forlocating manganese either directly or indirectlycontrolled by lithology.The geophysical study presented in this paperforms the first level of investigation. The inferencesmade out of the present qualitative study needs to bestrengthened through first hand physical propertystudies on rocks and the ores from the field,conducting further detailed gravity and magneticinvestigations in identified pockets of the blocks andquantitative interpretation and estimations throughverification drilling or pitting at one or two locationsin each block.160