Тип публикации: статья из журнала
Год издания: 2019
Идентификатор DOI: 10.15372/RGG2019073
Ключевые слова: Ar–Ar age, Fluid inclusions, Gold, Hydrocarbons, Quartz
Аннотация: New thermobarogeochemical and isotope-geochemical data are presented, which show the intricate and long history of the formation of the unique Olimpiadinskoe gold deposit with predicted gold reserves of 1000 tons on the Yenisei Ridge. Metal-bearing oxidized water–carbon dioxide and reduced carbon dioxide–hydrocarbon fluids participПоказать полностьюated (at the same time or successively) in the formation of the deposit at 220–470 ºC and 0.6–2.5 kbar. Fluids of gold-bearing mineral assemblages include CO2, hydrocarbons, and S-, N-, and halogen-containing compounds capable of transporting ore elements, including gold. Highly mobile carbon dioxide–hydrocarbon fluids were responsible for the appearance of disseminated gold mineralization in large bodies of quartz–carbonate–mica schists serving as geochemical barriers in the Olimpiadinskoe deposit. The deposit formed in the period from 817 to 660 Ma, which fits the time interval from crystallization to cooling (868–721 Ma) of the most proximal multiphase Chirimba granitoid pluton. The hydrothermal activity of the fluids that formed the Olimpiadinskoe deposit lasted at least 100–150 Myr year. © 2019, V.S. Sobolev IGM, Siberian Branch of the RAS.
Журнал: Russian Geology and Geophysics
Выпуск журнала: Vol. 60, Is. 9
Номера страниц: 1043-1059
ISSN журнала: 10687971
Издатель: Publishing House of Siberian Branch of the Russian Academy of Sciences