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Mineralogical and Geochemical Features of a Peat Deposit in the Eutrophic Obskoye Fen under Anthropogenic Load (Western Siberia)

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Abstract

The chemical composition and mineral inclusions in peats and the underlying soils of the eutrophic Obskoye fen (Western Siberia, Tomsk Region) are studied. The basic pattern of a change in the mineralogical and geochemical conditions at depth consists in domination of hydroxides on top of the peat deposit and sulfides at the bottom. The geochemical reduction barrier is formed at the bottom of the peat deposit. Its functioning is related to increased concentrations of U and Hg. The markedly pronounced influence exerted by sewage discharge is associated with an increase in the Na concentration in acid extracts from peats and additional accumulation of the mixture of suspended, colloidal, and dissolved forms of some metals in the boggy environment.

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Funding

This work was conducted with the participation of the International Research Laboratory for Arctic Sea Carbon and was supported by the Russian Foundation for Basic Research, project nos. 18–55–80015 and 18–05–00302.

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Authors and Affiliations

  1. Tomsk Polytechnic University, 634050, Tomsk, Russia

    O. G. Savichev, M. A. Rudmin, A. K. Mazurov, N. G. Nalivaiko &  I. P. Semiletov

  2. Presidium of Far East Branch, Russian Academy of Sciences, 690014, Vladivostok, Russia

    V. I. Sergienko

  3. Il’ichev Pacific Institute of Oceanology, Far East Branch, Russian Academy of Sciences, 690041, Vladivostok, Russia

    I. P. Semiletov

Authors
  1. O. G. Savichev
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  2. M. A. Rudmin
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  3. A. K. Mazurov
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  4. N. G. Nalivaiko
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  5. V. I. Sergienko
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  6. I. P. Semiletov
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Corresponding author

Correspondence to O. G. Savichev.

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Translated by L. Mukhortova

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Savichev, O.G., Rudmin, M.A., Mazurov, A.K. et al. Mineralogical and Geochemical Features of a Peat Deposit in the Eutrophic Obskoye Fen under Anthropogenic Load (Western Siberia). Dokl. Earth Sc. 492, 320–322 (2020). https://doi.org/10.1134/S1028334X20050219

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  • DOI: https://doi.org/10.1134/S1028334X20050219

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