Abstract
The complex of detail isotope-geochemical study of the Krivoy Rog super-deep well core was carried out for the first time: sulfides of sulfur, oxygen and carbon of carbonates, carbon in graphite and oxygen in magnetite. Krivoy Rog super-deep well is the first and so far the only super-deep well within Ukraine. The research covers all the Krivoy Rog series of the Early Proterozoic series, as well as the plagiogranites of the Dnepropetrovsk complex of the Archaean basement. Vertical isotope-geochemical zoning of carbon and oxygen of carbonates with simultaneous homogenization of the isotopic composition of elements to depth has been revealed. Carbonates in the series “pebbles and the initial sedimentary layer – deformed pebbles with redeposited matter – vein-metasomatic zones” are characterized by a regular and gradual change in the isotopic composition of oxygen and carbon. The established zonality, in all probability, reflects the influence of temperature conditions on the fractionation of carbon and oxygen in the process of metamorphogenic redistribution of carbonate material. Weighting of carbon graphite isotopic composition with increasing degree of metamorphism of rocks is observed.
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