SEM-EDS study of the platinum-group minerals in the PGE mineralized Hanumalapura segment of the layered mafic-ultramafic complex of Channagiri, Davangere district, Karnataka

SEM-EDS study of outcrop samples from the PGE mineralized, layered Hanumalapura segment of the Channagiri mafic-ultramafic complex, has revealed that they contain a variety of platinum-group mineral inclusions. Among more than 25 different PGM's distinguished, sperrylite, stibiopalladinite, hollingworthite, keithconnite, mertieite II, laurite, ruarsite together with a suite of Pt and Pd alloys, constitute the more important carriers of PGE in the ore reefs. From the close association of PGM ' s with chromite-bearing host rocks, it is inferred that crystallization of chromite had the governing control over the concentration of PGE.