Mineralogical features, sequence, and formation conditions of polygenic-polychronous mineralization of the Verkhnetatarskaya gold-bearing area (Yenisei Ridge)

Based on results of the field and laboratory studies within the Verkhnetatarskaya gold-bearing area (South Yenisei ore district), four sequentially formed mineral complexes have been distinguished and characterized: 1) gold-quartz (native gold (960 ± 20 ‰), quartz, albite, cummingtonite, almandine); 2) reduced intrusion-related gold (native gold (900 ± 20 ‰), pyrrhotite, arsenopyrite, native bismuth, hadleyite, maldonite, and an unnamed mineral Bi3Te2); 3) alkaline phlogopite-arfvedsonite-feldspar metasomatites with niobium mineralization; and 4) muscovite-quartz-tourmaline greisens. The temperature, pressure, and composition of the mineral-forming solutions have been determined for each complex based on fluid inclusions. Probable sources of the ore-forming material are indicated.