ПАРАГЕНЕТИЧНІ АСОЦІАЦІЇ РУДНИХ ЕЛЕМЕНТІВ У КАРБОНАТНИХ ПОРОДАХ ЗОНИ ЗЧЛЕНУВАННЯ ДОНБАСУ З ПРИАЗОВСЬКИМ БЛОКОМ УКРАЇНСЬКОГО ЩИТА

Abstract

Purpose. Study geochemical composition and parageneses ore elements in carbonate rocks articulation zones Pryazovskyi crystalline array Donetsk folded structure. Methodology. Complex statistical methods used SPSS / v19.0 for Windows package – namely, correlation and cluster analysis in determining the parageneses of ore elements in carbonate rocks. Results. The article studies carbonate rocks in which ore occurrences and areas of secondary mineralization distribution were previously established. Statistical data processing of semi-quantitative spectral analysis of samples was carried out. The statistical characteristics of the distribution of ore elements in primary carbonate (limestone, dolomite) and karst zones rocks are determined. An increase in the coefficients of variation and concentration of ore elements in karst formations has been established. It is concluded that an increase in the permeability of carbonate rocks in leaching zones is accompanied by the activation of hydrothermal-metasomatic reactions and contributes to the localization of ore occurrences of secondary mineralization (fluorite, quartz, sulfides). Leaching zones, next to zones of tectonic disturbances, served as the leading channels for hydrothermal solutions, under the influence of which substitution reactions of the main cations of carbonate rocks by ore element cations took place. Repeated activation of hydrothermal processes led to the formation of mudstones. Tectonic dislocations were accompanied by the formation of low-temperature associations of hydrothermal minerals. There are the higher-temperature associations of hydrothermal minerals in carbonate rocks on the areas of andesite-trachyandesite complexes igneous rocks distribution. Scientific novelty. It was established for the first time that the ore occurrences of the Donbass Junction Zone with the Priazovsky block of the Ukrainian Shield can be attributed to the hydrothermal mudstone formation, and their localization is determined by the presence of decompression zones in carbonate rocks. Practical significance. The regularities established can be used to predict leaching zones in carbonate rocks, where there is a decrease in the quality of carbonate raw materials. Key words: Associations of ore elements, concentration coefficients, hydrothermal mineralization, leaching zones, tectonic dislocations, mudstone formation.