GEOCHEMISTRY AND FORMATION OF THE CHEMICAL COMPOSITION OF NATURAL WATERS ON THE TERRITORY OF TUTUYASSKAYA AREA (KEMEROVO REGION)

Abstract

The relevance. The study of hydrogeochemical conditions and the formation of the composition of natural waters of the Tom-Usinsky district of the Kemerovo region in the absence of coal mining and loads on water systems is very important. The data obtained make it possible to expand the understanding of the general patterns of the distribution of elements in the water–rock system under conditions of coal deposits. This is especially true in the territory undisturbed by intensive mining, for example, coal mining or coal methane, characteristic of Kuzbass. This will make it possible to use the available information in various environmental and exploratory studies in the future. The main aim of the research is to study the geochemistry of natural waters, to calculate the activities of basic ions using the HydroGeo software package and to construct diagrams of the equilibrium of groundwater with water-bearing sediments; to identify the geochemical types of natural waters and study their change in accordance with the zonality traced in this area. Objects: underground waters of mainly Jurassic and Upper Permian terrigenous-coal-bearing deposits of the Taylugan formation of the Erunakov sub-series of the Kolchuginsky series of the Tutuyasskaya area of the Tom-Usinsky district of the Kuznetsk basin, as well as river waters of the territory. Methods. Chemical composition of water was determined by standard methods in the Problem Research Laboratory of Hydrogeochemistry of Tomsk Polytechnic University. The forms of humic acid migration were calculated using the HydroGeo software package. Results. The authors carried out studies of the chemical composition of natural waters on the territory of the Tutuyasskaya area of the Tom-Usinsky district of Kuzbass. Within the framework of this study, it was noted that the existing changes in the values of mineralization and pH are inherent in their natural distribution. The source of water intake is atmospheric precipitation entering the system from the feeding areas, therefore, the studied waters of infiltration genesis, hydrogeochemical zonality is traced. The article shows the results of calculation of the equilibria of groundwater of this area with carbonate and aluminosilicate minerals of the host rocks. It is established that the waters have an equilibrium-nonequilibrium character: they are nonequilibrium with primary (endogenous) minerals, which they dissolve, but at the same time they are equilibrium with clays and carbonates, i. e. they are precipitated from water.

Keywords

• surface and underground waters
• formation of composition
• equilibrium-nonequilibrium state
• water–rock
• zonality of groundwater
• kuzbass