Geology, mineralogy, and sulfur isotope geochemistry of the Sargaz Cu-Zn volcanogenic massive sulfide deposit, Sanandaj-Sirjan Zone, Iran

摘要

The Sargaz Cu-Zn massive sulfide deposit is situated in the southeastern part of Kerman Province, in the southern Sanandaj-Sirjan Zone of Iran. The stratigraphic footwall of the Sargaz deposit is Upper Triassic to Lower Jurassic (?) pillowed basalt, whereas the stratigraphic hanging wall is andesite. Mafic volcanic rocks are overlain by andesitic volcaniclastics and volcanic breccias and locally by heterogeneous debris flows. Rhyodacitic flows and volcaniclastics overlie the sequence of basaltic and andesitic rocks. Based on the bimodal nature of volcanism, the regional geologic setting and petrochemistry of the volcanic rocks, we suggest massive sulfide mineralization in the Sargaz formed in a nascent ensialic back-arc basin.