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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 Implications
| Content Provider | MDPI |
|---|---|
| Author | 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 |
| Copyright Year | 2022 |
| Description | 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. |
| Starting Page | 390 |
| e-ISSN | 2075163X |
| DOI | 10.3390/min12040390 |
| Journal | Minerals |
| Issue Number | 4 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-03-23 |
| Access Restriction | Open |
| Subject Keyword | Minerals Geology Tuva-mongolian Microcontinent Central-asian Orogenic Belt Gondwana Supercontinent Ophiolites Mineralogy Geochemistry Geochronology |
| Content Type | Text |
| Resource Type | Article |
