Gold–Sulfide Mineralization in the Manitanyrd Region, Polar Urals, Russia

This article describes the characteristics of gold–sulfide–quartz and gold–sulfide (gold–arsenic) ore occurrences in Manitanyrd region Polar Urals. Ore are confined to NE-trending shear zones have common features a geological structure. The host rocks metamorphosed volcanic volcanic–sedimentary rocks. We analyzed mineral chemical composition mineralization all studied occurrences, showing that they belong same type—pyrite–arsenopyrite, with variable ratio main minerals. Arsenic pyrite is present occurrences. Two stages formation were distinguished: early gold–pyrite–arsenopyrite finely dispersed gold late gold–galena–chalcopyrite–sphalerite coarse gold, fahlore, sulfosalts Pb, Cu, Bi, Sb. Native first generation, arsenopyrite pyrite, had an average high fineness (800‰–1000‰) relatively low dispersion. second generation was larger, its varied; one them, it varied from 300‰ 950‰, while others, 800‰ 950‰. isotope sulfur sulfides (δ34S) ranged between −0.2‰ −8.0‰. δ34S values range −3.5‰ similar meteorite, indicating participation single deep magmatic source formation. According study fluid inclusions, quartz veins occurs temperature 467–109 °C. similarity geological–structural, mineralogical–geochemical, isotope–geochemical area suggest their hydrothermal system.