Инд. авторы:	Damdinov B.B., Huang X.W., Goryachev N.A., Zhmodik S.M., Mironov A.G., Damdinova L.B., Khubanov V.B., Reutsky V.N., Yudin D.S., Travin A.V., Posokhov V.F.
Заглавие:	Intrusion-hosted gold deposits of the southeastern East Sayan (northern Central Asian Orogenic Belt, Russia)
Библ. ссылка:	Damdinov B.B., Huang X.W., Goryachev N.A., Zhmodik S.M., Mironov A.G., Damdinova L.B., Khubanov V.B., Reutsky V.N., Yudin D.S., Travin A.V., Posokhov V.F. Intrusion-hosted gold deposits of the southeastern East Sayan (northern Central Asian Orogenic Belt, Russia) // Ore Geology Reviews. - 2021. - Vol.139. - Art.104541. - ISSN 0169-1368.
Внешние системы:	DOI: 10.1016/j.oregeorev.2021.104541; WoS: 000719074600001;
Реферат:	eng: Our paper reviews a series of relatively low-grade gold deposits and prospects hosted by granitoid intrusions within the southeastern East Sayan in the Altaid Belt (northern Central Asian Orogenic Belt, Russia). The studied deposits/prospects are characterized by the presence of Te-, Sb- and Bi-bearing minerals. However, they differ in their main gold-associated mineral assemblages, which permits to distinguishing four mineralization assemblages: 1) gold-telluride; 2) gold-tetradymite; 3) gold-stibnite; and 4) gold-bismuth sulfosalt. The gold-telluride mineralization (1) is represented by the Tainskoye deposit, and the Khoringolskoye and Sagangolskoye prospects which are defined by paragenesis of native gold with Au-Ag-Bi-Pb-Ni tellurides, such as hessite, petzite, altaite, wehrlite, calaverite, melonite, altaite, and tellurobismuthite. The gold-tetradymite mineralization (2) which is represented by the Konevinskoye deposit, is hosted by the Saylag granitoid pluton, and contains tetradymite as one of the principal minerals associated with native gold. The gold-stibnite mineralization (3), represented by the Tumannoye prospect, is also hosted in a granitoid complex consisting of granodiorite and leucogranite. The gold-bismuth-sulfosalt mineralization (4) is documented at the Pogranichnoye prospect, where native gold is associated with the bismuth-bearing minerals: bismuthinite, galeno-bismuthite, lillianite, and native bismuth. Estimated delta O-18 values of ore-forming fluids from intrusion-hosted deposits range from 5.7 to 7.4%, indicative of a magmatic origin; delta S-34 values of sulfides vary from -4.2 to 4.5%, which corresponds to magmatic sulfur. The geological setting, element geochemistry of host granitoids, stable isotope ratios, and mineralogy of the studied deposits are consistent with a magmatic origin of the mineralizing fluids. The studied deposits are spatially associated with either Neoproterozoic or Early Paleozoic granitoids, belonging to the two main orogenic stages of the East Sayan geodynamic evolution. At similar to 850 Ma, during the Neoproterozoic stage, deposits with dominant gold-telluride assemblages, formed in association with granitoids characterized by geochemical features of island arc granites. During 458-439 Ma, in the Early Paleozoic stage, gold-tetradymite, gold-stibnite, gold-telluride and gold-bismuth-sulfosalt assemblages were formed that are spatially associated with orogenic granites with different geochemical compositions. Most gold-bearing mineral assemblages are intersected by post-mineral Late Paleozoic dykes. The origin of these different gold-sulfidetelluride assemblages is explained with their genetic association with granitoid intrusions of different ages and compositions.
Ключевые слова:	Russia; Intrusion-hosted gold deposits; Isotopes; Age; Tectonic setting; TRANSBAIKALIA; Southeastern East Sayan; PROVINCE; DISTRICT; GEODYNAMICS; MINERALIZATION; U-PB; PORPHYRY DEPOSITS; HYDROTHERMAL SYSTEM; ISOTOPE FRACTIONATION; THERMOCHRONOLOGY; Altaid Belt;
Издано:	2021
Физ. характеристика:	104541