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Sm–Nd Isotope Systematics of the Cenozoic Sand Deposits in the Muya Depression (Eastern Flank of the Baikal Rift Zone)

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Abstract

Sm–Nd isotope–geochemical studies of the Cenozoic sand deposits of the Muya Depression (eastern flank of the Baikal rift zone), which is located on the border of the Charo–Olekminskii Geoblock of the Aldan Shield and the Anamakit–Muya Zone of the Baikal–Muya Fold Belt, were carried out. The Nd model ages tNd(DM) were obtained for most of the sand samples from the Muya Depression in the range of 1.7–1.5 Ga (ɛNd(0) = –12.0…–13.3). According to the Nd isotopic characteristics, they are most similar to the metasedimentary rocks of the Gorbylok Sequence of the Bambui–Olindin Subzone and the Dzhaltuk Group of the Muya Subzone of the Anamakit–Muya Zone, which were most likely their source. In this case, the sedimentary material, primary for the Cenozoic sand of the Muya Depression, was transported over a relatively short distance.

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Funding

This study was supported by the Russian Science Foundation, project no. 19-17-00205.

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Authors and Affiliations

  1. Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences, 199034, St. Petersburg, Russia

    A. B. Kotov, V. P. Kovach, S. D. Velikoslavinskii, I. N. Buchnev & E. V. Adamskaya

  2. Institute of the Earth’s Crust, Siberian Branch, Russian Academy of Sciences, 664033, Irkutsk, Russia

    T. M. Skovitina & V. A. Gorovoy

Authors
  1. A. B. Kotov
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  2. T. M. Skovitina
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  3. V. P. Kovach
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  4. S. D. Velikoslavinskii
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  5. I. N. Buchnev
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  6. E. V. Adamskaya
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  7. V. A. Gorovoy
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Corresponding author

Correspondence to A. B. Kotov.

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Translated by A. Bobrov

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Kotov, A.B., Skovitina, T.M., Kovach, V.P. et al. Sm–Nd Isotope Systematics of the Cenozoic Sand Deposits in the Muya Depression (Eastern Flank of the Baikal Rift Zone). Dokl. Earth Sc. 499, 616–618 (2021). https://doi.org/10.1134/S1028334X21080055

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  • DOI: https://doi.org/10.1134/S1028334X21080055

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