Email this article Age and sources of the Lower Mesozoic metasedimentary rocks of the Un'ja-Bom terrane in the Mongol-Okhotsk fold belt: results of the U–Th–Pb geohronological (LA–ICP–MS) AND Sm–Nd isotope studies
- Authors: Zaika V.A.1, Sorokin A.A.1, Kovach V.P.2, Sorokin A.P.1, Kotov A.B.2
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Affiliations:
- Institute of Geology and Natural Management of Far Eastern Branch of Russian Academy of Sciences
- Institute of Precambrian Geology and Geochronology of the Russian Academy of Sciences
- Issue: Vol 484, No 4 (2019)
- Pages: 455-459
- Section: Geology
- URL: https://journals.eco-vector.com/0869-5652/article/view/12558
- DOI: https://doi.org/10.31857/S0869-56524844455-459
- ID: 12558
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Abstract
The results of the U—Th—Pb geochronological studies indicate that in the Un’ja-Bom terrane the youngest peaks on the relative probability curves of ages are 207 and 212 Ma for zircons from the metasiltstone of the Kurnal formation and from the metasiltstone of the Amkan formation. Similar age estimates for the youngest peaks were obtained for the detrital zircons from the metasedimentary rocks of the Tukuringra terrain of the eastern part of the Mongol-Okhotsk belt, which indicates that the Lower Mesozoic flyschoid complexes in the structure of this belt are developed much wider than is currently believed. The results obtained in our U—Th—Pb geochronological and Sm—Nd isotope geochemical studies suggest’s that the sedimentary rocks material was carried to the sedimentation basin mainly from the continental massifs of the Amur superterrane.
About the authors
V. A. Zaika
Institute of Geology and Natural Management of Far Eastern Branch of Russian Academy of Sciences
Author for correspondence.
Email: akotov@peterlink.ru
Russian Federation, 1, Relochniy lane, Blagoveshchensk, 675000
A. A. Sorokin
Institute of Geology and Natural Management of Far Eastern Branch of Russian Academy of Sciences
Email: akotov@peterlink.ru
Russian Federation, 1, Relochniy lane, Blagoveshchensk, 675000
V. P. Kovach
Institute of Precambrian Geology and Geochronology of the Russian Academy of Sciences
Email: akotov@peterlink.ru
Russian Federation, 2, Makarova embankment, St.Petersburg, 199034
A. P. Sorokin
Institute of Geology and Natural Management of Far Eastern Branch of Russian Academy of Sciences
Email: akotov@peterlink.ru
Corresponding Member of the RAS
Russian Federation, 1, Relochniy lane, Blagoveshchensk, 675000A. B. Kotov
Institute of Precambrian Geology and Geochronology of the Russian Academy of Sciences
Email: akotov@peterlink.ru
Russian Federation, 2, Makarova embankment, St.Petersburg, 199034
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