Geochemical Features of Peat Deposits at Oligotrophic Bogs in the Southern Taiga Subzone of West Siberia

• Published in: Geochemistry international 2021-06, Vol.59 (6), p.618-631
• Main Authors: Veretennikova, E. E., Kuryina, I. V., Dyukarev, E. A., Golovatskaya, E. A., Smirnov, S. V.
• Format: Article
• Language: English
• Subjects: Anthropogenic factors; Bogs; Calcium; Carbon/nitrogen ratio; Chemical elements; Chromium; Composition; Copper; Data acquisition; Deposits; Distribution; Earth and Environmental Science; Earth Sciences; Elements; Geochemistry; Geomorphology; Groundwater; Human influences; Iron; Lead; Manganese; Nickel; Oxidoreductions; Peat; Peat-bogs; Peatlands; Physicochemical processes; Physicochemical properties; Plant roots; Rock; Rocks; Taiga; Thickness; Water levels
• ISSN: 0016-7029; 1556-1968
• DOI: 10.1134/S0016702921050098

— The paper presents original authors’ data on the geochemical aspects and peat deposits and conditions of their accumulation at the three oligotrophic bogs in the south taiga subzone of West Siberia. These data were acquired with regard to a complex of factors impacting the development of peat deposits: the geomorphological setting in the landscape, the lithochemical composition of the underlying rocks, the physicochemical properties of the peat, and the contents of chemical elements and their distribution in the peat profiles. The impact of the geomorphological factor is reflected in the different ratios of peat layer thicknesses in the peat deposits of different type. The composition of the underlying rocks affected the concentration of elements and their distribution within the peat profile. The main element associations in the peat deposits of the bogs are identified using the method of principal components. The distribution of the elements in the peat deposits is shown to be differentially influenced by a number of factors: endogenous supply of elements from the underlying rocks and groundwater (Ca, Fe, Ti, Ni, Cu, Co, Cr, Ba, Cd, and Sr), the activity of redox processes (Mn, Pb, and Fe), redox-independent processes of the dissolution and mobilization of elements by plant roots (Ca, Cu, and Fe), the rate of peat decomposition (Mn, Pb, and the C/N ratio), the water level in the peatlands (C/N ratio), and atmospheric supply of anthropogenic compounds as a result of human activities (Pb).