Isotope composition of sulfur in Pyrites from North Caucasian copper pyrite deposits

The paper concerns sulfur isotope analysis, predominantly in pyrite, of copper deposits from the North-Caucasus. The deposits studied are Urup and Beskes, both possibly lower Paleozoic, and Ithudes, Lower Carboniferous. The sulfur isotope ratios are compared relative to the physicochemical conditions of formation, the effect of post-ore intrusions and isotope ratios from pyrite in siliceous shales. — M.A. Klugman.