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Structure, age, and geodynamic settings of early Neoproterozoic magmatic complexes of the Central Asian fold belt exemplified by the Holbo Nur zone of Songin terrane
- 作者:V. V. Yarmolyuk ; A. M. Kozlovsky ; E. B. Salnikova ; I. K. Kozakov…
- 刊名:Doklady Earth Sciences
- 出版年:2015
- 出版时间:November 2015
- 年:2015
- 卷:465
- 期:1
- 页码:1112-1116
- 全文大小:1,135 KB
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- 作者单位:V. V. Yarmolyuk (1)
A. M. Kozlovsky (1) E. B. Salnikova (2) I. K. Kozakov (2) V. P. Kovach (2) A. B. Kotov (2) O. Tomurtogoo (3)
1. Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry (IGEM), Russian Academy of Sciences, Moscow, Russia 2. Institute of Precambrian Geology and Geochronology, St. Petersburg, Russia 3. Institute of Geology and Mineral Resources, Mongolian Academy of Sciences, Ulan Bator, Mongolia
- 刊物主题:Earth Sciences, general;
- 出版者:Springer US
- ISSN:1531-8354
文摘
The Holbo Nur zone of Songin terrane in the Central Asian fold belt is a rare example of slightly metamorphosed paleoceanic complexes that were formed at the initial stages of the Paleoasian ocean evolution. The zone encompasses three tectonic slices. Rhyolites of the island arc series have been dated back to 888 ± 2 Ma; the formation of the island arc lasted from 888 to 859 Ma. The differences in the geological structure, geochemical and isotopic characteristics of igneous rocks constituting the tectonic slices of the Holbo Nur zone imply spatial isolation of these complexes during their formation in the Paleoasian ocean. They were tectonically juxtaposed between 859 and 790 Ma ago, which is evident from postkinematic granitoids.
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