Mineralogy, Geochemistry, and Geochronology of the Yehe-Shigna Ophiolitic Massif, Tuva-Mongolian Microcontinent, Southern Siberia: Evidence for a Back-Arc Origin and Geodynamic Implications

Zhmodik, S.M.; Buslov, M.M.; Damdinov, B.B.; Mironov, A.G.; Khubanov, V.B.; Buyantuyev, M.G.; Damdinova, L.B.; Airiyants, E.V.; Kiseleva, O.N.; Belyanin, D.K.

Авторы: Zhmodik Sergey Mikhailovich, Buslov Mikhail Mikhailovich, Damdinov Bulat Batuevich, Mironov Anatoli Georgievich, Khubanov Valentin Borisovich, Buyantuyev Molon Gimitovich, Damdinova Ludmila Borisovna, Airiyants Evgeniya Vladimirovna, Kiseleva Olga Nikolaevna, Belyanin Dmitriy Konstantinovich
Журнал: Minerals
Том: 12
Номер: 4
Год издания: 2022
Первая страница: 390
Последняя страница: 390
DOI: 10.3390/min12040390
Аннотация: The new results have been represented of mineralogical–geochemical and geochronological studies of rocks of the Yehe-Shigna ophiolite massif located in the Tuva-Mongolian microcontinent in the northern part of the Central Asian orogenic belt (Eastern Sayan, Southern Siberia). The Yehe- Shigna ophiolite massif is part of the Belsk-Dugda ophiolite belt. The structural position, age, and geochemical characteristics of the belt indicate its formation in the setting of the back-arc basin of the Shishkhid intraoceanic island arc, developing in the period of 810–750 million years. It is assumed that together with the same-age formations of the Oka accretion wedge and the Sarkhoi active margin, it formed on the convergent margin of the Gondwana supercontinent. Its basement is represented by the Archean-Early Precambrian crystalline rocks and carbonate cover (“Gargan Glyba”). The gold-bearing Neoproterozoic deposits with dominant gold-telluride assemblages are localization in large ophiolites thrust zones along with the frame of the “Gargan Glyba”. They are allochthonous with respect to the Late Neoproterozoic-Cambrian Tuva-Mongolian island arc of the Siberian continent. A similar type of gold deposit is probably worth looking for ophiolites thrust zones in other Precambrian Gondwana-derived microcontinents.
Добавил в систему: Хубанов Валентин Борисович

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Mineralogy, Geochemistry, and Geochronology of the Yehe-Shigna Ophiolitic Massif, Tuva-Mongolian Microcontinent, Southern Siberia: Evidence for a Back-Arc Origin and Geodynamic Implicationsстатья

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