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HYDROGEOCHEMISTRY OF THE UPPER CRYOLITHOZONE OF THE WEST SIBERIAN AND YENISEY-KHATANGA ARTESIAN BASINS CONJUNCTION ZONE

A. F. Sukhorukova, A. A. Maksimova, N. I. Yandola

Trofimuk Institute of Petroleum Geology and Geophysics SB RAS, Novosibirsk, Russia

The paper deals with analyzed drilling results for more than 200 shallow wells penetrating the upper cryolithozone and characteristic of the cryogenic rock state. Three types of waters are distinguished in relation to frozen rocks (suprapermafrost, intrapermafrost and subpermafrost contacting rocks). The chemical composition of the upper cryolithozone waters is considered in connection with the feasibility of using them for drinking and domestic water supply based on Russian and international standards. All types of waters are characterized by a mixture, which is explained by a composition diversity of water-bearing materials, as well as a significant excess of concentrations of iron, manganese, aluminum, silicium and organic pollutants, due to the processes of cryogenic metamorphosis of groundwater. It is shown that the maximum set of pollutants is naturally present in suprapermafrost waters, of which lead, chromium, fluorine, mercury, arsenic, selenium and benzapyrene belong to the highest (1 and 2) hazard classes.

Keywords: cryolithozone, hydrogeochemistry, fresh groundwater, pollutants, water supply, Arctic regions of Siberia.

DOI 10.20403/2078-0575-2025-1-55-63

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