УДК 553.411:550.42:553.2 • Issue 27 / 2017118 — 140 pages


Yu. Fomin, L. Zaborovskaya, N. Borisova, Z. Kravchuk

Yu. Fomin. Ph.D. (Geol.), Principal Specialist, State Institution “Institute of Environmental Geochemistry of National Academy of Sciences of Ukraine”

LZaborovskaya, Junior Researcher, State Institution “Institute of Environmental Geochemistry of National Academy of Sciences of Ukraine”, Kyiv,

N.Borisova. Leading Engineer, State Institution “Institute of Environmental Geochemistry of National Academy of Sciences of Ukraine”

Leading Engineer, State Institution “Institute of Environmental Geochemistry of National Academy of Sciences of Ukraine”


Features of three mineralization stages in Achaean gold deposits at greenstone belts of Middle Dnieper (Ukrainian Shield) are considered. These stages of mineral formation are volcanogenic-sedimentary, regional-metamorphogenic and local hydrothermal ones with corresponding mineral associations. The deposition of primary ores in propilites and secondary quartzites is connected with solphatar-fumarol activities of volcanic stage. Gold-bearing sulphide (Surskaya greenstone structure – Sergeevskoe deposit) and gold-bearing Cu-Mo porphyry ore mineralizations (Surskaya greenstone structure – Sergeevskoe and Balka Zolotaya deposits) were formed. The influence of metamorphic stage was determined by regional metamorphism intensity (facies of green shales and epidote-amphibolite) and with the point of view of ore productivity was not substantial. The formation of industrial ores in amphibole metasomatites, listvenite-beresites and chlorite-albitite metasomatites is connected with substance recycling during the latest hydrothermal-metasomatic stage. Au-Ag-Bi-Te (Au-sulfosalt-telluride) ores, Au-Fe (Au-magnetite) ores, Au-Ag-Pb-Zn (gold-polymetallic) ores and also Au-quartz, with low- sulphidization, ores were formed (Surskaya greenstone structure – Sergeevskoe and Balka Zolotaya deposits, Chertomlyk greenstone structure – Balka Shyrokaya deposit). The types of mineralization of these three stages differ from each other in the isotope composition sulfur of sulfides, oxygen and carbon of carbonates, as well as oxygen of oxides (magnetite). The sequence of mineralization of the hydrothermal-metasomatic stage at the deposits of the Surskaya and Chertomlyk greenstone structures is almost identical and indicates the proximity of the physical and chemical conditions for the operation of their regressive hydrothermal systems.


Key words: Archaea, greenstone belts, gold mineralization, tellurides, sulfosalts, isotopic composition, Middle Dnieper Area, Ukrainian Shield.




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