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The Early Cambrian Age and Crustal Sources of Granitoids of the Goryachinskiy Pluton (Northern Baikal): Geodynamic Implications

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Abstract

New results of U–Pb zircon and Nd–isotope analyses of the Goryachinskiy Pluton adakite granites have been obtained. The pluton is exposed along the Baikal coast in the section where a section of sheared tectonic sheets of the Baikal–Muya Belt wedges out. The determined Early Cambrian (545 ± 6 Ma) age of the granitoids is unusual in the Northern Baikal region. These new geological and isotopic data are interpreted as an indication of the formation of the granitoids studied at the final stage of the Late Baikal strike–slip tectonics, which caused the pulse of the adakite magmatism within the Baikal–Muya belt.

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ACKNOWLEDGMENTS

This study was carried out within the framework of research projects nos. 0153–2018–0012 and 0136–2018–0026 and was supported by the Russian Foundation for Basic Research, project no. 18–05–00724.

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Authors and Affiliations

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

    E. Yu. Rytsk, E. B. Salnikova, E. S. Bogomolov, Yu. M. Lebedeva, S. D. Velikoslavinsky, I. V. Anisimova, Yu. V. Plotkina & A. M. Fedoseenko

  2. Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, 119017, Moscow, Russia

    V. V. Yarmolyuk & A. A. Andreev

Authors
  1. E. Yu. Rytsk
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  2. E. B. Salnikova
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  3. V. V. Yarmolyuk
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  4. A. A. Andreev
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  5. E. S. Bogomolov
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  6. Yu. M. Lebedeva
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  7. S. D. Velikoslavinsky
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  8. I. V. Anisimova
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  9. Yu. V. Plotkina
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  10. A. M. Fedoseenko
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Corresponding author

Correspondence to A. A. Andreev.

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Translated by A. Larionov

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Rytsk, E.Y., Salnikova, E.B., Yarmolyuk, V.V. et al. The Early Cambrian Age and Crustal Sources of Granitoids of the Goryachinskiy Pluton (Northern Baikal): Geodynamic Implications. Dokl. Earth Sc. 484, 163–166 (2019). https://doi.org/10.1134/S1028334X19020053

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  • DOI: https://doi.org/10.1134/S1028334X19020053

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