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Main stages of tectonomagmatic activity of the Tuva–Mongolian microcontinent in the Precambrian: data on the U–Pb age of zircons

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Abstract

The U–Pb age of zircons from Ediacaran sandstones of the cover of the Tuva–Mongolian microcontinent and the rocks of its Early Precambrian basement (Gargan block) was analyzed by the LA–ICP–MS method. The major stages of tectonomagmatic activity of this block include the Neoarchean, Paleoproterozoic (no younger than 2 Ga), and Neoproterozoic. Comparison of the age of zircons from Ediacaran terrigenous rocks of the Tuva–Mongolian microcontinent and sandstones of the reference sections of the Ediacaran shelf of the Siberian platform undeniably indicates their independent accumulation.

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Authors and Affiliations

  1. Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia

    E. F. Letnikova, E. A. Karakovskii, I. A. Vishnevskaya, A. V. Ivanov & A. I. Prochenkin

  2. Institute of the Earth’s Crust, Siberian Branch, Russian Academy of Sciences, Irkutsk, Russia

    S. I. Shkolnik, F. A. Letnikov & L. Z. Reznitskii

  3. Novosibirsk State University, Novosibirsk, Russia

    E. A. Karakovskii & I. A. Vishnevskaya

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

    Yu. A. Kostitsyn

  5. Irkutsk State University, Irkutsk, Russia

    A. V. Ivanov

Authors
  1. E. F. Letnikova
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  2. S. I. Shkolnik
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  3. F. A. Letnikov
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  4. E. A. Karakovskii
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  5. Yu. A. Kostitsyn
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  6. I. A. Vishnevskaya
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  7. L. Z. Reznitskii
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  8. A. V. Ivanov
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  9. A. I. Prochenkin
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Corresponding author

Correspondence to E. F. Letnikova.

Additional information

Original Russian Text © E.F. Letnikova, S.I. Shkolnik, F.A. Letnikov, E.A. Karakovskii, Yu.A. Kostitsyn, I.A. Vishnevskaya, L.Z. Reznitskii, A.V. Ivanov, A.I. Prochenkin, 2017, published in Doklady Akademii Nauk, 2017, Vol. 474, No. 5, pp. 599–604.

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Letnikova, E.F., Shkolnik, S.I., Letnikov, F.A. et al. Main stages of tectonomagmatic activity of the Tuva–Mongolian microcontinent in the Precambrian: data on the U–Pb age of zircons. Dokl. Earth Sc. 474, 668–673 (2017). https://doi.org/10.1134/S1028334X17060113

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  • DOI: https://doi.org/10.1134/S1028334X17060113

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