Fluid formation mode of the Golets Vysochayshy gold field (Lensky gold region)

We have studied fluid inclusions in the quartz of recrystallized gold sulfide layers and in a pyrrhotine-quartz vein of the Golets Vysochayshy field confined to carboniferous shales of Riphean khomolkhinskaya suite. Methods of homogenization, cryometry and Raman spectroscopy were used for the investigations. The study allowed estimating conditions of the metamorphogenic-hydrothermal stage of ore formation. The mineral formation proceeded in aqueous solutions with the salinity 7-13 wt. % NaCl eq., containing nitrogen, methane and carbon dioxide with a small amount of propane and ethane. The homogenization temperature of the fluid inclusions in the quartz of laminated sulfide segregations was 232-473 °C, usually within 310-370 °C; a higher homogenization temperature (up to 507 °C) was observed in the inclusions in a pyrrhotine-quartz vein. It was assumed that the recovered (CO2/CH4