Sulphide Mineralization in the Parsoi Formation of Mahakoshal Group, Southern Mirzapur District, U.P.

Surface indications of sulphide mineralization were noticed in the form of gossan bands outcropping as cellular, spongy and boxwork structures of limonite in the marble of Parsoi Formation of Mahakoshal Belt near Ningha village in southern Mirzapur district. Investigations reveal that mineralization is localized along fractures, shears and zones of brecciation in the marble, and is controlled by the structural patterns of the host rocks. Sulphide mineral assemblage consists of pyrite, pyrrhotite, cobaltite, chalcopyrite, sphalerite, galena, proustite and pyrargyrite. The sulphides are found to occur in the form of veins, stringers and disseminations. Mineralogical assemblages and textural characteristics of the altered and sulphide zones indicate that mineralization is hypothermal in nature.