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Holocene Environments of Anomalous Uranium Concentrations in Sediments of Syrytkul Lake (Southern Urals)

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Abstract

The influence of the Holocene sedimentation conditions on uranium accumulation in sediments in Syrytkul Lake has been studied. The comparison of geochemical, palynological, and diatom data has made it possible to reveal the relation between the U concentration (5–89 ppm) in lacustrine sediments and environmental changes over more than 12 cal ka BP. The Late Glacial lake clay is relatively depleted in U. The maximum enrichment in U has been determined for lake sediments accumulated about 11.6–10.3 cal ka BP under climate warming and humidification. It has been concluded that the climate could have affected U accumulation through the catchment vegetation shifts. The dark coniferous forests that spread out after the climate cooling about 4.2 cal ka BP could have contributed to the U decrease.

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Funding

This work was supported by the Russian Science Foundation, project no. 18-77-00040. The core chronology was obtained with support from a State Task and the Ural Branch, Russian Academy of Sciences, project no. 18-5-5-43.

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Authors and Affiliations

  1. South Urals Federal Research Center of Mineralogy and Geoecology, Ural Branch, Russian Academy of Sciences, Ilmeny State Reserve, 456317, Miass, Chelyabinsk oblast, Russia

    A. V. Maslennikova, V. N. Udachin &  V. N. Anfilogov

  2. South Ural State University, 454080, Chelyabinsk, Chelyabinsk oblast, Russia

    A. V. Maslennikova & V. N. Udachin

Authors
  1. A. V. Maslennikova
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  2. V. N. Udachin
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  3. V. N. Anfilogov
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Correspondence to A. V. Maslennikova.

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Translated by E. Maslennikova

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Maslennikova, A.V., Udachin, V.N. & Anfilogov, V.N. Holocene Environments of Anomalous Uranium Concentrations in Sediments of Syrytkul Lake (Southern Urals). Dokl. Earth Sc. 492, 323–326 (2020). https://doi.org/10.1134/S1028334X2005013X

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  • DOI: https://doi.org/10.1134/S1028334X2005013X

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