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In the process of studying the Carboniferous-Permian section, rock samples were taken from two lithologic-stratigraphic sections of the Lower Carboniferous and Permian systems, from which the most representative rocks were selected, giving an idea of the material composition of the rocks of this stratigraphic section of the Shu-Sarysu depression. Further thermal and X-ray diffraction analyzes of these samples were carried out. Mineralogical interpretation of the analysis results showed the presence in the samples a number of formations, among which there are silicon oxides, feldspars, minerals of layered silicates, carbonates, etc. The method of localization of concentrated and dispersed forms of OM in the compositions of quartz formations is based on the laws of physical and ion sorption. Therefore, connection with the surface of crystals of other minerals is carried out mainly by means of underlying films made of secondary minerals of the group of phyllosilicates. In article shown that: 1) the packaging of OM in clay minerals takes place in the intergrid spaces of their layered structures or over the broken connections of the planes of the siliconoxygen frame of montmorillonites and members of this series of minerals; 2) in limestones concentration of Corg takes place in micro pores, as well as in cracks and chips of monomineral forms of СаСО3; 3) the background content of the dispersed organic matter (DOM) in the Carboniferous-Permian section is uniformly distributed in the range 0.1-0.5%; 4) in terrigenous rocks, in which feldspars and clay minerals predominate, the DOM content reaches 2%; 5) the obtained data will be used to correct the forecast resources of the southwestern part of the ShuSarysu basin. The Shu-Sarysu oil and gas basin is located within the boundaries of South Kazakhstan, and its forecast prospects for hydrocarbons are not fully understood. A number of medium and small gas and gas condensate fields are being developed on the area of this basin (Amangeldy, Pridorozhnoye, etc.) [1]. Three strata in the Upper Paleozoic section of the Shu-Sarysu basin are distinguished:lagoonterrigenous-salt-bearing strata of the Famennian-lower tour, up to 800 meters thick; terrigenouscarbonate marine, shallow, sometimes coal-bearing, Lower Carboniferous system – 500-2000 meters; alluvial-lake, predominantly red, mid Carboniferous Permian, up to 2.5 kilometers. At the base of the Lower Permian, the salt-bearing strata is up to 500 meters [2]. In the process of studying the Carboniferous-Permian section, rock samples were taken from two lithologic-stratigraphic sections. The first section, 5.5 km long, is located in the foothills of the Small Petrology of magmatic and metamorphic complexes IOP Conf. Series: Earth and Environmental Science 319 (2019) 012020 IOP Publishing doi:10.1088/1755-1315/319/1/012020 2 Karatau ridge according to the Kyzylsai log (10 km south of Lake Bilikol).The second section, 35 km long, is a continuation of the previous one and is located on the traverse the northern border of Lake Bilikol (Aksai GOK area)and further to the north-west towards to the Akkol settlement and the Talas River (figure 1).Thus, rock samples of the Lower Carboniferous and Permian system were taken, from which the most representative rocks were selected, giving an idea of the material composition of the rocks of this stratigraphic section of the Shu-Sarysu depression. Age and lithological types of rocks are given in tables 1-3. Further thermal and X-ray diffraction analyzes of these samples were carried out. Mineralogical interpretation of the analysis results showed the presence in the samples a number of formations, among which there are silicon oxides, feldspars, minerals of layered silicates, carbonates, etc. Figure 1.Schemes of the geological structure (a) and tectonic zoning (b) of the Karatauridge and the south-western end of the Shu-Sarysu basin, as well as adjacent territories. Straight line segments and number in circles shows the position of the key sections. In the first section, the quantitative ratios of the silicon oxides and hydroxides minerals and silicates were determined and clarified. Quartz and its modifications in the studied section are the most common, its presence is detected in all samples submitted for analysis. The content in the samples ranges from 5% to 98%, (tables 1-2).Quartz belongs to thermally amorphous formations, since, in the test temperature range, its presence can be determined only by a slight manifestation on the DTAcurve (differential thermal analysis) in the region of 500°C.As a comparison, rocks containing more than 80% of quartz develop the same endothermic effect when heated as in the case of thermal dissociation of a two percent calcite sample. At lower concentrations of crystalline silica in the samples, the indicated feature is lost against the thermal manifestations of other related minerals, which makes it difficult to determine the amount of this oxide. In this case, the content of the specified mineral in the composition of the sample was established during an additional surveying made on the basis of the heating of the prebaked sample, Petrology of magmatic and metamorphic complexes IOP Conf. Series: Earth and Environmental Science 319 (2019) 012020 IOP Publishing doi:10.1088/1755-1315/319/1/012020 3 when thermally active substances adjacent to quartz had already decayed and can no longer serve as a hindrance in the search for the only effect of the polymorphic transition of SiO2 from the α state to the β modification. Amphibole, as silicate, which includes hydroxyl water (2.9%) in its structure, usually presents, when heated (400-650°C), a very poorly expressed endothermic manifestation associated with the release of the OH group into the atmosphere. Heating of the K-13-6.1sample in the specified temperature range also leads to hydroxyl losses and causes curvature of the DTA and DTG lines (differential thermogravimetric analysis).In this case, the thermogravimetric curve captures 0.8% of the weight loss, of which half is the result of dehydroxylization of hydromica, and the rest (Δm = 0.4%) accounts for the release of amphibole crystal water to the atmosphere. Water loss is 13.8%, (table 1). Thermally inert minerals (TIM) natural formations that are difficult to thermally diagnose. In our case, these are amorphous formations of quartz, plagioclase, orthoclase, etc. Their quantitative content in samples is usually determined by the residual principle. So, the total content of plagioclase (~ 43%), detected by X-ray analysis, is close to the results of thermal determinations of poorly informative TIM, which were detected by exclusion from samples of thermally diagnosed minerals (table 1). Mixed-layered minerals (MLM), chlorite and hydromica were found by thermal analysis in a number of samples (table 1). MLM was detected in sample K-13-1, which gave endothermic reactions in the range of 20-230°C, 230-460°C and 460-600°C, associated with the decomposition of its structure. The existence of MLM destruction processes in these temperature ranges indicates the presence of weak line dips on the conjugate segments of the differential thermogravimetric curve. This is also indicated by the development of two stages of mass change on the TG-curve caused by dehydration of the system (Δm = 0.65% H2O) and release of hydroxyl water into the atmosphere (0.2% + 0.5). The weight loss of the sample during these reactions amounted to 13.5% in total, which, taking into account the MLM stoichiometry, corresponds to 7.7% of this inclusion in the rock (table 1). Chlorite in the rock K-13-1, due to its low content in the sample, was calculated according to the residual principle. In the interval of 720-815°C, the mineral loses0.15% (OH) of its weight, which, taking into account its stoichiometric formula, is 1.25% of the mass of the sample. The structure of chlorite (sample K-13-4) has intercrystalline defects, which causes an excess of molecular water and leads to a decrease of the binding energy of the OH groups. This is also evidenced by the decrease (by ~ 150°C) of the temperature of release to the atmosphere of the hydroxyl part of water. The total weight loss during dehydration of this mineral in the process of its heating is 0.6% (H2O) + 0.3% (OH) = 0.9%, which corresponds to the chlorite content in this sample equal to 3.9%. Hydromica (sample K-13-6.1) in the range of 60-100°С loses 0.4% of its weight (Н2О), and in the range of 400-630°С takes out another 0.4% of its mass (OH). According to stoichiometry of hydromica, these weight losses correspond to the presence in the sample of ~ 5% of this mineral, (table 1). Calcite is widely developed in rocks, rhodochrosite is found in association with it (less than 2%). The calcite content in the samples (in 8 cases out of 12) varies within 58-95%. Carbonates are distinguished by their perfect crystalline structure, as evidenced by the high temperature of dissociation of CaCO3, the limiting rate of emission of carbon dioxide into the atmosphere and the intense endothermic effect of mineral destruction. During thermal decomposition, the above-listed minerals form a clear symmetry of the side lines of the DTAand DTG-peaks, which is usually due to the absence of other calcite generation in the compositions of these formations or due to the high purity of CaCO3. Exceptions are the K-13-4 and K-13-15 samples, in which calcite is associated with a small amount of rhodochrosite (0.8 and 1.3%, respectively). Petrology of magmatic and metamorphic complexes IOP Conf. Series: Earth and Environmental Science 319 (2019) 012020 IOP Publishing doi:10.1088/1755-1315/319/1/012020 4 Table 1.Results of thermal analysis of carbonate-terrigenous rocks (biohermal construction) of the Lower Carboniferous, the Viseanstage of the southwestern part of the Shu-Sarysu depression (log Kyzylsai, south of Lake Bilikol profile 1). Lithology, age, No sample COorgand

Data of studying the content of organic matter in deposits of the stone-perm separation of the southwestern part of the Shu-Sarysu basin