V.V. Shatov, S.V. Kashin, V.N. Belova, E.N. Afanasieva, V.A. Mikhailov (Karpinsky Institute)

HYDROTHERMALLY ALTERED AND METAMORPHIC FORMATIONS OF THE OLYMPIADA GOLD DEPOSIT (YENISEI RIDGE): NEW DATA ON THEIR COMPOSITION, MINERALOGICAL, PETROGRAPHIC, AND GEOCHEMICAL FEATURES

The article presents the results of mineralogical, petrographic, and geochemical studies of hydrothermally altered and metamorphic formations of the Olympiada deposit. It shows that the combination of beresitization halos, which control the distribution of stratiform gold-sulphide mineralization in space, with multiplicative positive geochemical anomalies of Au-As-Te-Sb-Hg composition close to them in morphology, can be used as hydrothermal alteration and geochemical criteria for predicting gold-sulphide mineralization in the Olym­piada ore field. We discuss geological and genetic model of the Olympiada deposit formation, give recommendations on the use of this technique for predictive and prospecting purposes.
Keywords: Olympiada deposit, beresites, stratiform gold-sulphide mineralization, criteria for predicting gold mineralization, Yenisei Ridge.