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DMITRIEVSKAYA MAGMA-ORE-METASOMATIC SYSTEM OF THE NORTHERN PART OF GORNY ALTAI

A. I. Gusev, E. M. Tabakaeva

The Shukshin Altai State Humanities Pedagogical University, Biysk, Russia

The data on petrogeochemistry, petrology of dike formations and tungsten mineralization of the Dmitrievskoye ore field confined to the marginal magmatic and mineralizing part of the Belokurikha pluton. Dikes are represented by granite-porphyry two-mica, leucogranites two-mica, leucogranites moderately alkaline muscovite, and aplite. They belong to the peraluminium and magnesia types. In the deep focus, a mixture of shoshonite and adakite parent sources took place during the dike formation. Pneumatolitehydrothermal processes formed quartz-greisen and feldspatholithite deposits and manifestations of tungsten composition. Scheelite, wolframite of two generations, chalcopyrite, pyrite, galena, sphalerite, tourmaline, fluorite, muscovite, oligoclase, and orthoclase were observed in the ores. In the structure of the Dmitrievskaya that system the stage-type vertical zonation underlined by the change of mineral parageneses and composition of impurity elements in minerals was revealed. The zoning of mineralization and circum-ore metasomatites is caused by temporal and spacial changes in the composition of fluids and volatile components.

Keywords: dikes, granite-porphyry two-mica, leucogranites two-mica, leucogranites moderately alkaline muscovite, aplite, quartz veins, greisen, feldspatholithe, wolframite, scheelite.

DOI 10.20403/2078-0575-2018-3-65-75