The regional geochemical characteristics of the soil cover of the “Siberian Uvaly” natural park’s territory have been revealed. The comparative analysis of the background soils properties in Siberian Uvals (Podzol Arenic Turbic, Histosols Gelic and Fluvisols) and technogenic surface formations (TSF) constructed at oil and gas production fields was conducted. The chemical properties of the main types of soils were studied using traditional analytical methods of environmental monitoring: reaction of the medium, content of organic matter, mobile phosphorus compounds, content of the main salinizing sulfates and chloride ions in the water extract. Concentrations of mobile forms of some heavy metals (Pb, Ni, Cr, Cu and Mn) and the content of petroleum products in the main types of soils of the study area were also determined. Regional peculiarities of the geochemical background of the natural park were identified: increased content of oil products, manganese and zinc in organogenic horizons of natural background soils, located within the territory of specially protected natural areas, which act as a kind of reserve for maintaining the natural environment in its natural state. The presence of saline substances in the area may be a consequence of sea salt being transported by southern winds and with deposited on the uplands of the Siberian Uvaly. It could also be due permafrost processes in the process, which release salt from marine sediments. Oil and gas companies can use the research results to compare the initial contamination of licensed areas with background indicators when planning field development. Intensive oil and gas development of territories, accompanied by the impact on geosystems, requires systematic monitoring of the environment.
HMAO-Yugra, vozvyshennost' Sibirskie uvaly, tehnogennoe zagryaznenie pochv, nefteprodukty, hloridy i sul'faty, podzoly, torfyanye oligotrofnye pochvy
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