Affiliation:
1. Institute of Geology and Nature Management, Far Eastern Branch of the Russian Academy of Sciences
2. Vinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences
Abstract
The paper presents the first results on Sm-Nd isotopic-geochemical studies of the Paleozoic sedimentary rocks in the Nora-Sukhotino terrane at the northeastern flank of the South Mongolia-Khingan orogenic belt.According to the studies, the sedimentary rocks of the Zeya-Selemdzha and Amur fragments of the Nora-Sukhotino terrane are characterized by the two-stage Mesoproterozoic Nd-model age (TNd(DM2)=1.62–1.08 Ga) at negative εNd(0)=–9.5…–3.0 and εNd(T)=–5.8...–0.2. Based on previous geochemical and isotopic (U-Pb, Lu-Hf) studies of sedimentary rocks of the Nora-Sukhotino terrane, as well as on the available models for the formation of the South Mongolia-Khingan orogenic belt, it can be assumed that most of the Paleozoic sediments of the Nora-Sukhotino terrane were carried from the Mamyn terrane of the Argun superterrane with the participation of the island arc formations.
Publisher
Institute of Earth's Crust, Siberian Branch of the Russian Academy of Sciences
Subject
Earth-Surface Processes,Geophysics,Geology,Economic Geology
Reference32 articles.
1. Feng Z., Jia J., Liu Y., Wen Q., Li W.M., Liu B., Xing D., Zhang L., 2015. Geochronology and Geochemistry of the Carboniferous Magmatism in the Northern Great Xing’an Range, NE China: Constraints on the Timing of Amalgamation of Xing’an and Songnen Blocks. Journal of Asian Earth Sciences 113, 411–426. https://doi.org/10.1016/j.jseaes.2014.12.017.
2. Feng Z., Liu Y., Li Y., Li W., Wen Q., Liu B., Zhou J., Zhao Y., 2017. Ages, Geochemistry and Tectonic Implications of the Cambrian Igneous Rocks in the Northern Great Xing’an Range, NE China. Journal of Asian Earth Sciences 144, 5–21. https://doi.org/10.1016/j.jseaes.2016.12.006.
3. Fu W., Hou H., Gao R., Zhou J., Zhang X., Pan Z., Huang S., Guo R., 2021. Lithospheric Structures of the Northern Hegenshan-Heihe Suture: Implications for the Paleozoic Metallogenic Setting at the Eastern Segment of the Central Asian Orogenic Belt. Ore Geology Reviews 137, 104305. https://doi.org/10.1016/j.oregeorev.2021.104305.
4. Государственная геологическая карта СССР. Амуро-Зейская серия. Масштаб 1:200000. Лист N-52-XXXIV (Норск). М.: Аэрогеология, 1978].
5. Geological Map of the USSR, 1986. Amur-Zeya Series. Scale 1:200000. Sheet М-52-III (Svobodny). VSEGEI, Leningrad (in Russian)