چكيده لاتين :
The mineralization occurs at the intersection of Uroomieh-Dokhtar magmatic belt with Doruneh fault as the most important lineament in Iran. Detailed mineralogical, geochemical and geophysical investigations in
the vicinity of the Talmessi Mining Area indicate that mineralization had occurred in two separate stages: first stage - fissure -filling copper sulfide mineralization associated with Eocene magmatism (veins, veinlets,stockworks). The second over imposed stage which occured after a fairly long interval involves the formation of Ni, Co and U minerals. Vein studies show that several time reactivations of NW trending faults play an important role especially in second arsenidic stage of mineralization. Most of the high angle faults are belong to NW
category. When these faults reactivated, their high-angle and, hence, small lithostatic pressure of the overlying rocks as well as existence of the pyroclastice facies of the rocks - provide the permeable pathways for ore-bearing fluids in the second stage of mineralizaion. The fluid inclusion, ore microscopy and stable isotope studies support different mechanisms of mineralization during these two phases of mineralization.
