![]() ![]() Overprinting of primary structures, presence of mixed Fe-clasts and Mn-ooliths/pisoliths, mineral species of different generations and wide chemical variation amongst morphological varieties and from boulder to boulder are the characteristic hallmarks of such ore bodies. These ores appear in form of large boulders within lateritised aprons at various depths, often reaching beyond 30 m from the surface. ![]() of Geology, Utkal University Bhubaneswar-751004 Į-mail: type of manganese ore bodies in the Precambrian Iron Ore Group of rocks occur in Bonai-Keonjhar belt, Orissa besides stratiform (bedded type) and stratabound-replacement types of deposits. Institute of Minerals and Materials Technology Bhubaneswar-751013 Į-mail: *P.G.Deptt. 36-46ĭetrital type Manganese Ore Bodies in the Iron Ore Group of Rocks, Orissa, Eastern India
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