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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.

The relevance. When studying the formation of the composition of organic-rich waters, it is necessary to take into account organomineral compounds that shift the equilibria in geochemical processes (dissolution, leaching, precipitation and co-deposition, sorption, ion exchange, oxidation-reduction) towards the aqueous phase, thereby directly affecting the composition of waters. The main aim of the research is to calculate the forms of migration of basic ions and some micro-components, with an emphasis on organomineral complexes, based on available data on the composition of waters, including concentrations of fulvic and humic acids. Objects: groundwater of Permian terrigenous-coal-bearing deposits (Kolchuginskaya formation) Naryksko-Ostashkinskaya areas located at depths of 0,4–1,2 km in the zone of delayed water exchange, as well as overlying fresh underground zones of active water exchange, river and lake waters. Methods. The chemical and organic composition of water was determined by standard methods in the Problem Research Laboratory of Hydrogeochemistry of Tomsk Polytechnic University, the determination of fulvic acids (FA) and humic acids (GA) was carried out by titration based on bichromate consumed for carbon oxidation of fulvohumic acids. The forms of humic acid migration were calculated using the HydroGeo software package. Results. The migration forms of the main ions and, for the first time, humic acids contained in high concentrations in the natural waters of the Naryk-Ostashkin territory (Kuzbass) were determined by thermodynamic calculations. It was established that cations migrate in a simple ionic form, but in the zone of delayed water exchange at high concentrations of bicarbonate ion (soda water), a significant part (up to 50 %) begins to take their carbonate forms. Only iron forms compounds with fulvic acids in significant amounts (more than 1 %), but under specific geochemical conditions. Humic acids themselves, relative to their content in waters in % proportion, bind well into complex compounds. Fulvic acids are almost completely consumed, giving preference to Na, even in calcium waters. However, this has little effect on the general substance of Na itself. Humic acids mainly migrate with Mg and Ca, but the more soda composition of the waters, the more their amount remains in free form.

The relevance of the research is related to the regional specificity of the coal deposit load and objects of the coal complex on water bodies. The data obtained make it possible to expand the understanding of the general regularities in the element’s distribution in the «water – coal bearing rock» system and further use them in various ecological and exploration studies. The aim of the research is to study the features of the component maximum amount distribution in the natural waters of the region and the composition of the host rocks, to estimate the rate of chemical element leaching from the rocks. Objects: surface and groundwater of the Naryksko-Ostashkinskaya area in the Kemerovo region, the most promising for coalbed methane production. Methods: modern methods for determining the water and rock chemical composition, including inductively coupled plasma mass spectrometry, as well as standard hydrogeochemical methods for calculating the concentration factors and water migration. Results. The paper introduces the data on 59 elements, including the micro-components of rivers, lakes and groundwater of different water exchanges: active, upper part and lower part (coal bearing rocks) of passive. When the water–rock interaction time increases, the salinity and the major ion and trace element concentrations increase as well. The calculated concentration coefficients relative to the average for groundwater leaching in a moderate climate made it possible to distinguish elements with a high level of accumulation: from major components, these are C, Na, Cl, Fe and the trace elements are Ga, Ba, Li, Zr, Pb, B, Sc, Ni, Br, Rb, Sr, Nb, Mo, I, Ag, Cd, Cs, Hg. The paper introduces as well the data on 48 elements of the coal bearing sandstones and siltstones, which, together with the literature data on some other elements, made it possible to obtain interesting relationships. For example, in a percentage relative to the total salinity, groundwaters of active water exchange contain 1–2 orders of magnitude more than in rocks: Cu, Ag, Cd, Sr, Sn, Sb, I, Cs, Hg, Pb. Taking into account water and rock composition, the coefficients of water migration were calculated, the series of migration of different types of waters were compiled, which did not reveal any fundamental differences. In all natural waters, they are highly mobile: Na, C, Cl, I, B, N, Br, Sr, Cd, Cu, Li, Mo, Ge, Zn; weakly mobile: Al, Ti, Zr, V, Nb, Eu, Mn, Si, Cr, Co, Fe, Rb.

Relevance. Dissolved organic matter almost always presents in waters and plays an important role in the formation of their chemical composition, while until recently it has received little attention. For the Kuznetsk Basin, the study of dissolved organic matter is very important due to the presence of coal deposits, which determines the regional specifics of the loads on water systems. The aim of the research is to study the dissolved organic matter distribution in the surface and groundwaters of the region. Methods. Chemical and organic composition of water was determined by standard methods in the Research Laboratory for Hydrogeochemistry of Tomsk Polytechnic University: dissolved organic carbon – by the method of high-temperature catalytic oxidation, oxygen demand chemical oxygen demand, biochemical oxygen demand – by titration methods. Fulvic acid and humic acid were determined by the titration method to account dichromate consumed for the fulvic and humic acid carbon oxidation. Results and conclusions. The paper introduces the data on dissolved organic matter indicators and fulvic acid and humic acid concentrations in river, lake and ground waters of the Kuzbass Naryksko-Ostashkinskaya area. It was shown that fulvic acids prevail, from 69 to 100 %, in all waters in composition of humic substances. The humic ones have a subordinate significance. Groundwater in zones with intensely fractured rocks is distinguished by the minimum values of all dissolved organic matter indicators (dissolved organic carbon, oxygen demand, chemical oxygen demand, biochemical oxygen demand) and relatively heterogeneous humic substances composition. River and lake waters have more homogeneous humic substances composition and narrow dissolved organic matter range values, despite differences in chemical composition and pH. For groundwater in zone of damped fracturing circulating within the coal deposits at depths of 400–1200 m, the highest dissolved organic matter indicators and relatively homogeneous fulvic and humic acid composition are characteristic. At the first stage of the research, there is no the relationship between the organic matter concentration and the salinity and all the waters chemical composition, pH and depth.