Mineralography and chemistry of hypogene sulfides in Mahour ore deposit, east of Nehbandan, East of Iran
Subject Areas :
Keywords: Dehsalm Mahuor ore Hypogene mineralization Hydrothermal Silver. ,
Abstract :
Mahour ore deposit is located in eastern margin of Lut Block, 130 Km west of Nehbandan. Hypogene sulfides of Cu, Pb and Zn mainly occur beneath an oxide zone in depth. Altered dacites are the most important host rocks for these sulfides. Rock units are mainly Eocene andesite, andesite-basalt and dacite lavas and Eocene pyroclastic deposits (tuff and lithic tuff) in the area. The rocks are calc-alkaline and geochemically belong to continental margin tectonic setting. Pyrite, chalcopyrite, galena, sphalerite and a silver-rich mineral were formed in fractures and other open spaces as well as vein by hydrothermal solution Chemistry of these minerals and distribution of Ag, Pb and Zn in them were studied by an Electron probe micro-analyzer (EPMA). These minerals show variation in chemistry and some of them contain silver. This type mineralization in Mahour shows characteristic between base metals veins and low sulfidation epithermal deposits.