A modern and scientifically based indicators forecast of toxic and potentially toxic element concentrations allows us to develop and plan organizational and technicaltechnological measures aimed at reducing the negative impact of the coal industry and heating enterprises on the ecological state of the environment. For this purpose it is necessary to have data about concentration, character and features of the distribution of toxic and potentially toxic elements, including nickel, lead and chromium in coal and the rocks that contain it. Toxic elements are one of the main sources of environmental pollution thatnegatively affects human health. Research in this direction is conducted to reduce the degree of negative effects and additional pollution of the environment. Increasing requirements for environmental protection in the coal-mining industry sector of Ukraine stipulates the need for new scientifically grounded methods for forecasting the content of toxic and potentially toxic elements in the rock mass which is extracted by mines, the waste of coal extraction and coal enrichment and also the influence of the coal-heating enterprises on the environment. In the article, the results of investigations of toxic elements in coal seams of the Donetsk-Makiivka geological and industrial area of the Donbas are considered. The research covered the whole territory of one of the most studied geological and industrial districts of the Donbas – Donetsk-Makiivka. As a result of the study, correlation coefficients were calculated that allow us to predict the concentration of nickel, lead and chromium in the products and wastes of coal enrichment and correct the technological schemes of coal enrichment taking into account their content. We also calculated the regression equation between these elements and the ash content of the coal, which will allow us to predict their concentration in the main working coal seams of the DonetskMakiivka geological and industrial districts relative to the values of coal ash content. The character of the distribution is established and the weighted average concentrations and basic descriptive statistics for nickel, lead, and chromium in the coal seams and suites are calculated. The composition and character of their typomorphic geochemical associations, as well as the features and regularities of their accumulation in the coal seams of the Donetsk-Makiivka geological and industrial districts are revealed.

The method of creating an objective (natural) typification of sections of the coal seam of the Dniprovska mine of different capacities according to germanium concentrations has been established and substantiated. The constructed dendrograms of clustering of coal seam areas by Ge content can be used as a basis for developing a natural typification of coal seams for geological and economic evaluation. This will make it possible to make maximum use of already available information and interpret the obtained results in geological and genetic concepts, which provides the possibility of its use for the complex use of mineral raw materials, solving strategic issues of sustainable development of Ukraine.

Представлено результати багаторічних геохімічних досліджень вмісту таких металів, як алюміній, ртуть, хром, марганець, залізо, цинк, кобальт, нікель та ванадій, а також загальних концентрацій цих металів і сірки у нафті з 36 родовищ основного нафтогазоносного регіону України – Дніпровсько-Донецької западини.Мета досліджень полягала у розробці класифікації родовищ нафти на прикладі Дніпровсько-Донецької западини на основі геохімічних досліджень вмісту металів та їх кластерного аналізу, яку можна використовувати як найсуворіший критерій їх поділу на дві принципово різні групи – родовища, сформовані переважно нафтами біогенного походження, та родовища, що містять нафту суттєво абіогенної генерації.За результатами кластерного аналізу вперше розроблено природні класифікації цих родовищ за переліченими показниками та за співвідношенням V/Ni, що наведено у статті у вигляді дендрограм. Показано, що за результатами кластерного аналізу, вибіркові середні значення проаналізованих показників значущо відрізняються між окремими родовищами чи групами родовищ в установлених рядах, що можна інтерпретувати в термінології якісної оцінки так: аномально низькі; низькі; нижче середніх; середні; вище середніх; високі; аномально високі. Аналіз результатів досліджень та їхня інтерпретація у генетичному сенсі із порівнянням з трьома різними геохімічними критеріями відношення походження нафти до абіогенних або біогенних джерел нафтогенезу, згідно з існуючими уявленнями, надали можливість встановити, по-перше, родовища, які за кожним із цих уявлень відносяться до сформованих переважно абіогенною речовиною, по-друге, встановити та проаналізувати збіг та відмінності у переліку цих родовищ.Обґрунтовано, що порівняльний аналіз результатів кластеризації розглянутих родовищ за вмістом у нафті таких абіогенних елементів, як алюміній і ртуть, за результатами їх кластеризації за концентраціями ванадію, хрому і кобальту показує, що сукупність родовищ, які відносяться до кластерів з високим і аномально високим вмістом ванадію, хрому і кобальту, відрізняється від переліку родовищ з високими та аномально високими концентраціями алюмінію і ртуті тільки відсутністю Юр’ївського родовища. Таким чином, є сенс брати до уваги як критерій виділення родовищ з нафтою суттєво абіогенного походження, крім концентрацій ванадію, хрому і кобальту, ще й співвідношення Co/Ni та Cr/Ni.

The possibility of obtaining special permits for the use of subsoil (after approbation of mineral reserves) has been canceled from February, 2020. This decision was made without much discussion. The opinions of subsoil users were also not taken into account. The “monopolization” of the auction procedure has some negative aspects. They are discussed in the article. It is proposed to consider the possibility of returning to the order that was in effect before February 2020.

Purpose. The purpose of the work is to establish and analyze the relationship between germanium concentrations, toxic elements and the content of total sulfur in the coal seam c5в of the «Ternivska» mine field of the Pavlohrad-Petropavlivka area of Donbas. Methodology. The factual basis of the work was the results of germanium, beryllium, fluorine, mercury, arsenic and total sulfur analyzes in the coal seam c5в. The content of Ge, Be, and F was determined by quantitative emission spectral analysis, Hg and As by atomic absorption analysis. Using the STATISTICA 13.3 and IBM SPSS Statistics 22 programs, the values of the main descriptive statistical indicators were calculated. Correlation and regression analysis was carried out using the methods implemented in Micromine program and their analysis was carried out in geological concepts. Results. It is substantiated that the minimum contents of at least As, Hg, Ge and total sulfur in the coal seam c5в of the "Ternivska" mine were jointly accumulated at the syngenetic stage of its formation. The simultaneous increase in the content of Ge and Be in the area of their low and abnormally low concentrations is caused by the joint accumulation of these elements at the syngenetic stage of coal seam formation and their increase in the area of maximum contents is caused by the manifestation of the empirical regularity of the «Zilbermints law». It is proved that the distribution of the values of Ge content, toxic elements and total sulfur in the coal seam c5в of the «Ternivska» mine differ from the Gaussian-Laplace and lognormal distributions, in all cases the polymodality of the distribution is fixed and the kernel of the distribution density is shifted to the left. Scientific novelty of the results of the conducted research consists in establishing the non-compliance of the samples of all considered elements with the normal or lognormal distribution law, while in all cases the polymodality of the distribution of indicators is recorded, which is confirmed by analytical calculations of the correspondence of the empirical distributions of the studied parameters of the Gaussian distribution using the Kolmogorov-Smirnov, Shapiro-Uilk criteria, Lilliefors and Pearson's chi-squared agreement. It is proved that the forms of finding of the investigated elements in coal with their concentrations around Clark and in coal with increased contents differ significantly. The influence of syngenetic and epigenetic processes on the nature of the relationship between Ge concentrations, toxic elements and the content of total sulfur in the coal seam c5в of the «Ternivska» mine was revealed. Practical significance of the results of the work consists in establishing the presence of a very low correlation between the concentrations of Ge and toxic elements and total sulfur, therefore, the extraction of germanium from the coal seam will not be accompanied by their significant accumulation during technological processes. It has been proven that for a more realistic assessment of the central tendency of the content of Ge and toxic elements and total sulfur, instead of the values of the arithmetic mean, it is necessary to use the median values. Key words: germanium, beryllium, mercury, arsenic, total sulfur, coal seam, frequency histograms, regression analysis, correlation analysis, polymodality of distribution.