The Lower Precambrian in the structure of paleozoic in the Subpolar Urals
- Authors: Pystina Y.I.1, Pystin A.M.1, Hubanov V.B.2
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Affiliations:
- Institute of Geology, Komi Science Center of the Ural Branch of the Russian Academy of Sciences
- Geological Institute, Siberian Branch of the Russian Academy of Sciences
- Issue: Vol 486, No 5 (2019)
- Pages: 572-576
- Section: Geology
- URL: https://journals.eco-vector.com/0869-5652/article/view/14485
- DOI: https://doi.org/10.31857/S0869-56524865572-576
- ID: 14485
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Abstract
In many polymetamorphic complexes of the Urals, rocks with Early Precambrian age marks have been established. But only with respect to the two polymetamorphic complexes located on the western slope of the Southern Urals: the Taratash and Aleksandrov, their indisputable belonging to the Archean-Paleoproterozoic section is recognized. They are framed by weakly metamorphosed Lower Riphean sediments and reliable geochronological data are obtained from them, which unambiguously indicate the Early Precambrian age of rock metamorphism. The available Early Precambrian age datings for other Ural polymetamorphic complexes (with the prevailing number of Late Precambrian and Paleozoic age values) are interpreted differently. Therefore, their attitude to the Lower Precambrian section has been disputed by many researchers. In the article, for the first time, based on the results of mass U-Pb dating of metamorphic zircons from the gneiss of the Nyrtin polymetamorphic complex of the Subpolar Urals, taking into account the available data, the Paleoproterozoic age of the earliest stage of rocks metamorphism (2127 ± 31 Ma) is substantiated. This gives grounds to assert that the complex under consideration, as well as the Taratash and Alexandrov complexes of the Southern Urals, belongs to the Lower Precambrian formations involved in the structure of Uralides.
Keywords
About the authors
Yu. I. Pystina
Institute of Geology, Komi Science Center of the Ural Branch of the Russian Academy of Sciences
Author for correspondence.
Email: yuliya_pystina@mail.ru
Russian Federation, 54, Pervomayskaya street, Syktyvkar, 167982
A. M. Pystin
Institute of Geology, Komi Science Center of the Ural Branch of the Russian Academy of Sciences
Email: pystin@geo.komisc.ru
Russian Federation, 54, Pervomayskaya street, Syktyvkar, 167982
V. B. Hubanov
Geological Institute, Siberian Branch of the Russian Academy of Sciences
Email: yuliya_pystina@mail.ru
Russian Federation, 6A, Sakhyanova street, Ulan-Ude, 670047
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