Associate Professor of the Department of Geography, Geology and Geophysics
DOI: 10.24411/0869-5997-2019-10017
Keywords:
Kumroch gold-silver-polymetallic deposit, ore formation, Eastern Kamchatka, sphalerite, pyrite, fahlores.Abstract
The Kumroch deposit is one of the most promising ore deposits in the Kamchatka region. It is located in the central part of the East Kamchatka volcanic belt and belongs to complex polygenic type with gold-silver (LS type) and porphyry copper mineralization. This paper presents the actual material obtained with the integrated mineralogical-geochemical study of gold-silver mineralization. There are three ore types: gold-quartz-adular, gold-polymetallic and porphyry copper. Texture-structural features, mineral and chemical composition, modes of precious and base metals occurrence and some features of ore genesis have been studied in detail. Using modern methods of local physical and chemical analysis, typomorphic features of sulfides Zn, Fe, Pb, fahlores and tellurides of Au, Ag are characterized. The following mineral associations are distinguished: quartz-sphalerite-pyrite, sphalerite-fahlore, sphalerite-galena, quartz-pyrite, pyrite-chalcopyrite-fahlore, gold-pyrite, gold-quartz. The temperatures and composition of ore-forming solutions are estimated.
