Peculiarities of Ore Formation at the Teploe Ag-Au Deposit, Northeast Russia.

The mineralogical-geochemical and thermobarogeochemical features of the Teploe Ag-Au epithermal deposit are considered. The dissolution and redeposition of ore minerals are a result of thermal metamorphism. The redistribution of Ag leads to the formation of lenaite and exsolution structures in minerals of the Cu-Ag-S system; abundant stromeyerite, jalpaite, and mckinstryite compose a significant amount of ores. The atypical physicochemical parameters of the formation of ores include high (for epithermal mineralization) temperatures and low salinity and density of the fluid typical of a dry vapor. The results of fluid inclusion study ascribe the Teploe deposit to an intermediate class of epithermal deposits. [ABSTRACT FROM AUTHOR]