Sulfur Isotope Variations in Barite and Pyrite of Hydrothermal Barite Deposits of Cuddapah Basin, Andhra Pradesh

The δ³⁴S X-CDT values for barite and pyrite range from +23.6 to +25.5 per mil and -0.9 to +1.9 per mil respectively. Data of fluid inclusion studies enable temperature of deposition to be 250°C after pressure correction of homogenization temperatures (Th). The δ³⁴S X-CDT values of pyrite and barite suggest igneous source for pyrite and marine for barite implying that they are not formed together. The δ³⁴S X-CDT values of barite agree with δ³⁴S X-CDT values for contemporaneous Proterozoic sea water.