The Mineral-Geochemical Evidence of Contact Transformation of Ores of the Dzhusinskoe Pyrite-Polymetallic Deposit (Southern Urals)

摘要

The Dzhusinskoe pyrite-polymetallic deposit is characterized by an abundant concentration of dykes of basic and intermediate rocks. Thermal metamorphism of ore-host rocks and the recrystallization of ore minerals are associated with the intrusion of post-ore dykes. A regular increase in the homogenization temperature from 156° at a distance from a dyke to 287-305°C in the contact zone was established. Highly saline (6.4-15.7 wt % NaCl eq.) CO_2-H_2O-NaCl fluids under high pressure (up to 1500 bar) can be associated with the processes of contact and regional metamorphism.