Geochemical Study of Vein-Type Tungsten-Copper Mineralization in Southwest of Shazand

Two cases of tungsten-copper vein-type mineralization have been studied in the Nezam-abad and Deh-hossein areas، in southwest of Shazand. The hydrothermal quartz-tourmaline mineralized veins have different host rocks (biotitic-granite and meta-sandstone). Considering similar ore metals (tungsten-copper-tin-lead-zinc) in the Nezam-abad and Deh-hossein areas، same mineralogy of veins (quartz-dravite) and similar REE variation patterns in the two areas، it is suggested that the Nezam-abad and Deh-hossein mineralized veins have the same origin. It means، when the Br-bearing fluids were active، they caused the quartz-tourmaline vein-type mineralization in this area. Considering the barren intrusions in the area and other mineralogical-geochemical evidences in this study، it could be concluded that tungsten and other metallic elements in the Nezam-abad and Deh-hossein ore-bearing veins have a sedimentary/metamorphic origin.