THE TAINSKOE GOLD DEPOSIT (EASTERN SAYAN, RUSSIA) - A NEW EXAMPLE OF THE PORPHYRY GOLD TYPE
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dc.contributor.author | Mironov A.G. | |
dc.contributor.author | Ochirov Yu.Ch. | |
dc.contributor.author | Popov V.D. | |
dc.contributor.author | Zhmodik S.M. | |
dc.contributor.author | Borovikov A.A. | |
dc.date.accessioned | 2021-02-26T12:28:00Z | |
dc.date.available | 2021-02-26T12:28:00Z | |
dc.date.issued | 2001 | |
dc.identifier | https://elibrary.ru/item.asp?id=13388330 | |
dc.identifier.citation | Geology of Ore Deposits, 2001, 43, 5, 353-370 | |
dc.identifier.issn | 1075-7015 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/25758 | |
dc.description.abstract | A new gold deposit in Eastern Sayan located in a granitoid stock cutting hyperbasites of the Il'chir ophiolitic cover is described. Three types of ore bodies are distinguished: quartz-vein, quartz-muscovite-pyrrhotite, and veinlet-disseminated. Their common features are the dominance of pyrrhotite among sulfides, the abundance of kustelite, and presence of tellurides and carbonaceous matter in ores and host granitoids (0.14-0.58 wt %). Mineral-forming fluids, of the Tainskoe deposit were presented by water-salt and mostly vapor phases and were heterogenic. The temperature of mineral formation decreased from more than 400°C for veinlet-disseminated to 280-120°C for quartz-vein and quartz-muscovite-pyrrhotite types with the pressure reaching 950-770 bars. The salt composition of fluids for all the ores was similar in terms of main salt components, but the salt concentration decreased from 29-28 to 28-23 wt % from the veinlet-disseminated type to the quartz-vein one. Methane dominated in the composition of the vapor phase. The ores are though to belong to the porphyry gold type (so-called reduced porphyry gold type) connected with island-arc magmatism. The latter was characteristic of the formation of granitoids among hyperbasites and the carbonate-shale sequence enriched with carbonaceous matter of both biogenic and mantle origin. | |
dc.title | THE TAINSKOE GOLD DEPOSIT (EASTERN SAYAN, RUSSIA) - A NEW EXAMPLE OF THE PORPHYRY GOLD TYPE | |
dc.type | Статья |
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