1- Faculty of Earth Sciences, Shahid Beheshti University, Tehran
Abstract: (152 Views)
The copper and zinc sulfide deposit of Sargaz is located 30 aerial kilometers northwest of Jiroft city and southeast of Iran. Upper Triassic to Lower Jurassic pillow basalts host massive copper and zinc sulfide mineralization. This area is located in the structural zone of Sanandaj-Sirjan. In this area, there is a massive sulfide zone at the border of jasper and basalt, so that from the surface to the depth, first the flysch unit and andesite, pyroclastic, jasper, massive sulfide, sheared stringer, non-mineralized stringer and basalt can be seen. Mineralization is accompanied by siliceous-chlorite alteration. These alterations are spatially related to mineralization. In this research, the origin of ore-forming fluids along with salinity, trapping depth and pressure of the deposit formation environment have been investigated. The study of fluid inclusions showed that the hydrothermal fluid that produces mineralization consists of ocean water and metamorphism.
The calculated oxygen isotope values range from -1.2 to -13.36 per thousand, which indicates the mixing of several fluids with different origins (atmospheric water and oceanic water), so the Sargaz deposit is composed of atmospheric, oceanic, and basinal fluids and transformation is formed. The study of fluid inclusions showed that ore-forming fluids at shallow depth and low pressure caused the formation of Sargaz copper and zinc deposit.
The calculated oxygen isotope values range from -1.2 to -13.36 per thousand, which indicates the mixing of several fluids with different origins (atmospheric water and oceanic water), so the Sargaz deposit is composed of atmospheric, oceanic, and basinal fluids and transformation is formed. The study of fluid inclusions showed that ore-forming fluids at shallow depth and low pressure caused the formation of Sargaz copper and zinc deposit.
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