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

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 d...

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Bibliographic Details
Published in:Doklady earth sciences 2020-05, Vol.492 (1), p.320-322
Main Authors: Savichev, O. G., Rudmin, M. A., Mazurov, A. K., Nalivaiko, N. G., Sergienko, V. I., Semiletov, I. P.
Format: Article
Language:English
Subjects:
Anthropogenic factors
Chemical composition
Earth and Environmental Science
Earth Sciences
Eutrophication
Fens
Geochemistry
Human influences
Hydroxides
Mercury
Metals
Mineral inclusions
Mineralogy
Peat
Purification
Sewage
Soil
Sulfides
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Summary: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.
ISSN:1028-334X
1531-8354
DOI:10.1134/S1028334X20050219