Spatiotemporal Changes in River Waters and Bottom Sediments Composition Within the Tugan Placer Deposit (Tomsk Oblast)
https://doi.org/10.31857/S2587556620050143
Abstract
The changes in the chemical and mineral composition of bottom sediments and waters of the Omutnaya River (the element of the Omutnaya–Kirghizka–Tom–Ob river system) during the main phases of the water regime in 2018–2019 within the planned Tugan placer deposit (ore minerals—ilmenite and zircon) have been studied. Geochemical parameters were estimated using an inductively coupled plasma mass spectrometry method. It was obtained that the spatiotemporal changes in the gross contents of chemical elements are generally interrelated with their migration forms. General increase in the concentrations of substances in suspended form is predominant and noted in spring floods, with dissolved—in the winter low-water period. Changes in the chemical composition of bottom sediments (fraction up to 1 mm) during the year and from the source to the mouth of the river due to the influence of local geological and hydrological factors are weaker than the corresponding changes in the chemical composition of river waters. Based on the studies, it was shown that the maximum concentrations of ore elements within the halos of placer deposits are most likely under conditions of a relatively stable (geologically) decrease in the intensity of water exchange.
Keywords
spatiotemporal changes,
chemical composition,
bottom sediments,
river waters,
Tugan deposit,
Western Siberia
Supporting agencies: The work was financially supported by the Russian Foundation for Basic Research, projects no. 18-55-80015 and 17-05-00042.
About the Authors
O. G. Savichev
Tomsk Polytechnic University
Russian Federation
Tomsk
Russian Federation
Tomsk
V. A. Domarenko
Tomsk Polytechnic University
Russian Federation
Tomsk
Russian Federation
Tomsk
O. L. Lepokurova
Tomsk Polytechnic University; Tomsk Branch of Trofimuk Institute of Petroleum-Gas Geology and Geophysics of SB RAS
Russian Federation
Tomsk
Russian Federation
Tomsk
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Savichev O.G., Domarenko V.A., Lepokurova O.L. Spatiotemporal Changes in River Waters and Bottom Sediments Composition Within the Tugan Placer Deposit (Tomsk Oblast). Izvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya. 2020;84(5):715–727. (In Russ.) https://doi.org/10.31857/S2587556620050143
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