Typization of epithermal gold-silver systems of Greater Caucasus

Abstract

Relevance. The different deposits and manifestations of gold ore mineralization on the Greater Caucasus described and so an epithermal. Typezation of gold-silver epithermal ore mineralization with using physic-chemical of conditions it forming on the modern level did not lead. The aim of the study is to receive complex geology-mineralogical and physic-chemical characteristic of ores and it typezation on the modern level. Objects of researchingwerechoose an epithermal deposits and manifestations gold-silver types in all tectonic zones of region. Materials, using in paper, received by of author in process carrying out of prospect- ing, prospecting-estimation, geology-survey (1:50000) and special metallogenic researching that it conducted from 1967 year on the Greater Caucasus. The additional materials on epithermal systems of Raduzhnaya, Kovalevskaya, Kerigo collected in 2014-2018 years. Methods. Methods of study except of geological and petrographic of description of ores and metasomatic include receiving quantitative characteristic of determination of temperatures of crystallization minerals, fugacitiesoxygen, and sulfur, Ph and other thermodynamic parameters of ore mineralization. Fugacitiesoxygen, sulfur and tellurium received from standard plots of ratio physic-chemical parameters. Results. New data received on typezation of an epithermal gold-silver systems of different tectonic unites of Greater Caucasus in result of complex researching. Magmatism with that connected ore mineralization characterized by high alkali and anomaly parameters of fluid regime. All gold-silver epithermal objects carry to low sulfidation, intermediate sulfidation and high sulfidation types distinguishing of peculiarities content of ores and ore metasomatic changes, temperatures of crystallization productive stages of mineralization, metasomatic changes, quantify fugacity asoxygen, sulfur, different ratio of selenides and tellurides in ores.Reconciling of copper-molybdenum-gold-porphyry and epithermal gold-silver ore mineralization in region present more perspective. The potential ore field Kerigo and Tanadon-Sangutidon-Kazbek ore district where it developed periphery sites of porphyry system that it may accompany and by epithermal gold-silver mineralization refer to such districts.