STRUCTURAL-TECTONIC AND PETROLOGICAL SIGNS OF LATENT PYRITE-POLYMETALLIC MINERALIZATION BOLONSKOGO TYPE (MOUNTAINOUS OSSETIA)

Abstract

Detailed field observations and petrochemical studies allowed to identify close Bolonskogo pyrite-polymetallic deposits among deep polymetamorphic rocks boronski strata relic effusive rocks, converted into secondary quartzites (zone of leaching) and changing russiantvonline Greenstone changed porpitidae, whitewashing interstratified with quartz-sericite and quartz-chlorite schists and hydrothermally altered quartzite-felsite. In quartzite, representing a monomineralic quartz rock (silica content is 75-80 %), it was possible to identify relict porphyritic structure - tabular phenocrysts of plagioclase are completely replaced by quartz, with strict preservation of its original tablet form. Also able to identify blastoporphyritic structure porphyrinoids microlites with relict structure of the main mass. Below is a detailed description of the stratigraphic position of these ancient effusive rocks within boronski strata, and petrological and petrochemical peculiarities. Spatial relationship Bolonskogo pyrite-polymetallic deposits with whitewash quartz-sericite schists, with zones of secondary quartzite and Greenstone areas RussianTown modified porphyrinoids obvious, and can serve as a basis in prospecting for pyrite-polymetallic mineralization Bolonskogo type and put it on a par with the pyrite deposits of the Eastern slope of the Urals and North-Western Caucasus the type of Urup.