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

Abstract

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.

Article

Reference

1. V. Monakhov. Gold-bearing factors of the Middle Dnieper granite-greenstone Area of Ukrainian Shield (for Sursk greenstone structure) / V. Monakhov, VSukach, O. Kostenko, M. Malykh // Mineral. zhurn. – Mineral. Journ., 1999, Vol. 21, 4, S. 20-31 [in English].
2. M. Korzhnev. Geologo-strukturnye usloviya i etapy zolotonakopleniya v Srednepridneprovskoy granit-zelenokamennoy oblasti [Geological and structural conditions and stages of accumulation of gold in the middle of the Dnieper granite-greenstone region] / M. Korzhnev, V. Monahov, Yu. Fomin, D. Shcherbak // Dopovidi NAN Ukraini. – Reports of Sciences Academy of Ukraine, 1994, 10, S. 87-91 [in Russian].
3. Yu. Fomin. Geneticheskie tipy zolotogo orudeneniya arheyskih zelenokamennyh struktur Ukrainskogo shchita [Genetic types of gold mineralization of Archean greenstone structures of the Ukrainian shield ]. / Yu. Fomin, Yu. Demihov, E. Lazarenko // Mineral. zhurn. – Mineral. Journ., 2003 Vol. 25, 1, S. 95-103 [in Russian].
4. V. Monakhov. Zolotonosnye kvarc-karbonat-amfibolovye metasomatity zelenokamennyh struktur dokembriya Srednego Pridneprovya [Gold-bearing quartz-carbonate-amphibole metasomatites of the Precambrian Middle Dnieper greenstone structures] / V. Monakhov, V. Sinitsin, Yu. Fomin, M. Korzhnev, A. Parfenova. // Geol. zhurn. – Geol. Journ., 1994.3, S. 65-76 [in Russian].
5. Yu. Fomin. Geneticheskie osobennosti zoloto-kolchedannyh rud Surskoy struktury (Ukrainskiy schit) [Genetic features of gold-pyrite ores of the Sursk structure (Ukrainian shield)] / Yu. Fomin, M. Korzhnev // Dopovidi NAN Ukraini – Reports of Sciences Academy of Ukraine, 1993, 12, S. 121-126[in Russian]
6. Yu. Fomin. Zoloto-polimetalicheskoe orudenenie Balki Shirokoy (Srednee Pridneprovie) [Gold-polymetallic mineralization of Balka Shirokaya Wide Beams (Middle Dnieper region)] / Yu.A. Fomin, Yu.N. Demihov, Yu.A., Shibeckiy, E.E., Lazarenko, V.I. Blazhko // Mineral. zhurn. – Mineral. Journ., 1996, Vol.18, 1, S. 74-87 [in Russian]
7. N. Shcherbak. Geohronologicheskaya shkala dokembriya Ukrainskogo shchita [Geochronological scale of Precambrian of the Ukrainian Shield]. / N.P. Shcherbak, G.V. Artemenko, E.N. Bartnickiy – Kiev: Nauk. Dumka, 1989, 144s [in Russian].
8. Yu.Shibeckiy. Izotopno-geohimicheskoe sopostavlenie zolotorudnyh mestorojdeniy arheyskih zelenokamennyh poyasov [Isotope-geochemical collation of gold deposits of Archaean greenstone belts] / Yu.A. Shibeckiy, Yu. A. Fomin, Yu. N. Demihov // Mineral. zhurn. – Mineral. Journ., Vol., 1997, 19, 1, S. 38-50 [in Russian]
9. V. Monahov. Sulfosoli iz proyavleniy zolotoy mineralizacii v dokembrii Srednego Pridneproviya [Sulfosalts from manifestation of gold mineralization in Precambrian of the Middle Dnieper region] / V.S. Monahov, Yu.A. Fomin, V.A Sinitsyn. // Mineral. zhurn. – Mineral. Journ., 1995, Vol.17,3, 58-66 [in Russian]
10. Yu. Fomin. Stabilnye izotopy S,O,C,H v zolotonosnyh amfibolovyh metasomatitah Surskoy struktury'(Ukrainskiy shchit) [Stable isotopes of S, O, C, H in gold-bearing amphibole metasomatites of the Sura structure (Ukrainian shield)] / FominYu.A., Monahov.V.S., Korzhnev. M.N., Sinitsin V.A // Mineral. zhurn. – Mineral. Journ. 1994 Vol.16, 2, S. 49–55 [in Russian].
11. Yu. Fomin. Zoloto-dzhespilitovoe orudenenie balki Shirokaya (Srednee Pridneprove) [Gold – jaspilite mineralization of the Arroyo Shyrokaya ( Middle Dnieper Region)] / Yu.A. Fomin, L.T. Savchenko, Yu.N. Demihov, N.M. Gostyaeva, E.E. Lazarenko // Geol. zhurn. – Geol. Journ., 1995, 3, S. 84-95 [in Russian].
12. Yu. Fomin. Priroda magnetita zolotonosnyh zelenokamennyh struktur Srednego Pridneprovya (po izotopnym i geohimicheskim dannym) [Nature of magnetite of greenstone gold structures of the Middle Dnieper region (by isotopic and geochemical data)] / Yu.A. Fomin, L.T. Savchenko, A.S. Ivanov// Mineral. zhurn. – Mineral. Journ., 1995, Vol.17, 3, S. 67-73 [in Russian].
13. H. Stein ¹⁸⁷Re-¹⁸⁷Os ages for molybdenites from the Maiske and Sergeevske Au deposits, Ukraine. / Stein H. J., Markey  R. J., Sundblad  K. // Geophysical Journal, 1998, Vol.20, 4, S. 114-117 [in English].
14. V.Monahov Telluridnaya mineralizaciya zolotorudnyh proyavleniy Srednego Pridneprovya [Telluride mineralization from the gold manifestations of the Middle Dnieper region] / V.S .Monahov, Yu.A. Fomin, A.Ya. Parfenova // Mineral. zhurn. – Mineral. Journ., 1998, Vol.20, 4, S. 3-16 [in Russian].
15. N. Markham Synthetic and natural phases in the system Au-Ag-Te. // Economic Geology, 1960, Vol.55, 6, S. 1148-1178; Vol.55, 7, S. 1460-1477 [in English].
16. S.Nenasheva Eksperimentalnoe issledovanie prirody primesey serebra, surmy i vismuta v galenite [Experimental study of the nature of the impurities of silver, antimony and bismuth in galena] / S.N. Nenasheva – Novosibirsk: Nauka, 1975, 124s. [in Russian].
17. Yu. Fomin Dva tipa rudnoy mineralizacii zoloto-polimetallicheskogo rudoproyavleniya Balki SHirokoy (Srednee Pridneprove) [Two types of ore mineralization of the Balka Shirokaya gold-polymetallic manifistation (Middle Dnieper region )] / Yu. A. Fomin, Yu. N. Demihov, E. E. Lazarenko, V.I. Blazhko // Dopovidi NAN Ukraini – Reports of Sciences Academy of Ukraine, 2007, 10, S. 118-123 [in Russian].
18. Y. Kajiwara. Sulfur isotope portioning in metallic sulfide systems / Y. Kajiwara, H. R. Krouse /Can. Journ. Earth Sci., 1971, Vol 8, 11, S. 1397-1408 [in English].
19. V. Smirnov (Eds.) Stabilnye izotopy i problemy rudoobrazovaniya [Stable isotopes and problems of ore formation ] // Moskow: Mir, 1977, 597s. [in Russian]