The Exotic Inim Block of the Argun Superterrane of the Central Asian Fold Belt: Results of U–Th–Pb Geochronological (LA-ICP-MS) and Sm–Nd Isotopic–Geochemical Studies
- Authors: Ovchinnikov R.O.1, Sorokin A.A.1, Kotov A.B.2, Sal’nikova E.B.2, Kovach V.P.2, Sorokin A.P.1
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Affiliations:
- Institute of Geology and Natural Management, Far East Branch, Russian Academy of Sciences
- Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences
- Issue: Vol 484, No 2 (2019)
- Pages: 151-155
- Section: Geology
- URL: https://journals.rcsi.science/1028-334X/article/view/194597
- DOI: https://doi.org/10.1134/S1028334X19020259
- ID: 194597
Cite item
Abstract
The results of studies indicate that the age of the protoliths of garnet-bearing biotite–sericite–muscovite schists of the Inim Block is <991 Ma, and they are derived from rocks of the Neo-, Meso-, and Paleoproterozoic (as well as Archean) crust. This suggests that the Inim Block is exotic relatively to the Argun Superterrane due to the formation of the protolith of its metasedimentary rocks largely from erosion products of the Early Precambrian continental crust, the presence of which within the Argun Superterrane is not proven. It is not excluded that the Inim Block is a fragment of the Dzhugdzhur–Stanovoi Superterrane implanted in the structure of the Argun Superterrane as a result of Mesozoic tectonic events.
About the authors
R. O. Ovchinnikov
Institute of Geology and Natural Management, Far East Branch, Russian Academy of Sciences
Author for correspondence.
Email: Ovchinnikov@ignm.ru
Russian Federation, Blagoveshchensk, 675000
A. A. Sorokin
Institute of Geology and Natural Management, Far East Branch, Russian Academy of Sciences
Email: Ovchinnikov@ignm.ru
Russian Federation, Blagoveshchensk, 675000
A. B. Kotov
Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences
Email: Ovchinnikov@ignm.ru
Russian Federation, St. Petersburg, 199034
E. B. Sal’nikova
Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences
Email: Ovchinnikov@ignm.ru
Russian Federation, St. Petersburg, 199034
V. P. Kovach
Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences
Email: Ovchinnikov@ignm.ru
Russian Federation, St. Petersburg, 199034
A. P. Sorokin
Institute of Geology and Natural Management, Far East Branch, Russian Academy of Sciences
Email: Ovchinnikov@ignm.ru
Russian Federation, Blagoveshchensk, 675000