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New Data on the Paleoproterozoic Age of Metamorphism in the Yelabuga Deformation Zone of Volgo-Uralia, East European Craton

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Abstract

This data on the age of metamorphism of rocks of the Yelabuga zone and the geochronological data on detrital zircon from paragneisses of the same zone are presented, and their correlation with the ages of rocks from the Middle Volga megablock is made. The rocks of the Yelabuga zone and Middle Volga megablock have similar geochemical characteristics and degrees of metamorphism, but demonstrate the following differences: Paleoproterozoic metamorphism was clearly expressed in the studied rocks of the Yelabuga zone, which contrasts to rocks of the Middle Volga megablock, where no metamorphism of this age is manifested. The study of the U–Pb isotopic system in external zones of zircon crystals from the Yelabuga deformation zone suggests that rocks underwent two stages of metamorphism, 1.99 and 1.95 Ga ago.

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ACKNOWLEDGMENTS

This work was conducted with the help of E.V. Bibikova. We also thank Prof. M. Whitehouse and Nordsim Laboratory (Sweden) for the opportunity to use the secondary-ion mass spectrometer for isotope analyses.

Funding

This work was supported by the Russian Foundation for Basic Research (project no. 15–05–08125) and by the Earth Science Division of the Russian Academy of Sciences (Program no. 8).

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Authors and Affiliations

  1. Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, 117975 , Moscow, Russia

    A. A. Fedotova, M. O. Anosova, M. M. Fugzan & T. I. Kirnozova

  2. Geological Institute, Russian Academy of Sciences, 119017 , Moscow, Russia

    A. A. Fedotova

  3. Geological Institute of Lund University, SE-22362, Lund, Sweden

    S. V. Bogdanova

  4. Kazan Federal University, 420008 , Kazan, Russia

    S. V. Bogdanova

  5. Swedish Royal Museum of Natural History, SE-10605, Stockholm, Sweden

    S. Claesson

  6. Gubkin Russian State University of Oil and Gas, Moscow, Russia

    A. V. Postnikov

Authors
  1. A. A. Fedotova
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  2. S. V. Bogdanova
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  3. S. Claesson
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  4. M. O. Anosova
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  5. A. V. Postnikov
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  6. M. M. Fugzan
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  7. T. I. Kirnozova
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Corresponding author

Correspondence to M. O. Anosova.

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Translated by N. Astafiev

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Fedotova, A.A., Bogdanova, S.V., Claesson, S. et al. New Data on the Paleoproterozoic Age of Metamorphism in the Yelabuga Deformation Zone of Volgo-Uralia, East European Craton. Dokl. Earth Sc. 488, 1123–1127 (2019). https://doi.org/10.1134/S1028334X19090241

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  • DOI: https://doi.org/10.1134/S1028334X19090241

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