Karly Z.V., Syomka V.O., Stepanyuk L.M., Bondarenko S.M., Karly V.E., Syomka L.V.
M.P. Semenenko Institute of geochemistry, mineralogy and ore formation NAS of Ukraine
Language: Ukrainian
Geochemistry and ore formation 2015, 35: 11–18
https://doi.org/10.15407/gof.2015.35.011
It was found geochemical characteristics and the distribution of elements in the rocks of the central part of Kocherevska depression. It was determined that for the crystalline rocks of the Ukrainian shield structure is characterized by two types of geochemical associations. These associations are characteristic of two different rock formations. First – Th, U, Bi, Mo, Pb characteristic of uranium deposits of K-U formation. Second – Cr, Ni, Co, Cu, Zn, V, Sc characteristic of metabasite. UMo-Bi-Th-TR mineralization is characteristic much microcline pegmatite, aplite and quartz-biotite-microcline metasomatites and by the nature of mineralization geochemical refers to K-U genetic type. By geological and structural conditions of the location and mineral composition Bezim’yanyy U-Mo-Bi-Th-TR occurrences is similar to Kalynivskyy, Uzhnyy and Lozuvatskyy U-Mo-Th-TR deposits of Pobuzkyy uranium-ore area. These deposits refer to class ultrametamorfic (post-granitization) of K-U-Ore formation, formed in crystalline rocks of Precambrian shields in paleoproterozoic (2000–2100 million Years). Endogenic occurrence of U-Mo-Bi-Th-TR mineralization in the crystalline basement of Kocherivska area submitted various genetic types that rarely occur alone, but together (like Bezim’yanyy occurrence) they form a complex polygenic object. Ultrametamorphic genetic type of occurrence connected with genetically geochemical specialization “bystriyivsky” granite that likely formed by granitization metapelits and therefore widespread as in themselves granites and so in accompanying aplite, pegmatite and quartz-biotite-microcline metasomatites.
Key words: rare earth elements, thorium, uranium, molybdenum, bismuth, geochemistry, granite, pegmatite, aplite, ore-bearing metasomatites, kocherevska depressions, Ukrainian shield, K-U formation.
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