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Information × Registration Number 0213U000536, 0112U008169 , R & D reports Title Petrology, tectonogenesis and dating of Paleoproterosoic granite magmatism and alkali metasomatism in the Ukrainian Shield. popup.stage_title Head Emetz Alexander Victorovich, Registration Date 14-02-2013 Organization M.P. Semenenko Institute of Geochemistry, mineralogy and Ore Formation popup.description2 Mineralogical-geochemical and petrological-tectonical specifications of Paleoproterozoic granitoid complexes and U-mineralized alkaline metasomatites of the Ukrainian Shield were investigated. The rocks were investigated macroscopically and microscopically, chemical composition of rocks and minerals were analysed, isotopic analyses were accomplished and P-T parameters of fluid inclusions were measured. The analytical results were processed using petrological and geochemical diagrams, age of minerals was deduced. Kirovograd and Zhytomyr granitoid complexes are mostly related to S-type granites formed 2090..2026 Ma, apparently in syncollision environment. Novoukraonka granites have characteristics of anorogenic island arcs A2 granitoids, were melted at 2040..2025 Ma probably in postcollisional or postorogenic environment. Korosten and Korsun-Novomyrgorod plutons represent A2-type granitoids (granites of arc islands) which were formed 1800..1750 Ma and 1760..1725 Ma, respectively. U-mineralized Na-metasomatites of the Ingul megablock were formed between 1810 and 1750 Ma on the zones of extended cataclasis related to intersections of regional and local faults during 5 hydrothermal stages. Uranium accumulation is connected with Ca- and K-measomatism, occurred during quartz leaching and accumulation of Ca, Mg, K, Rb, U, Zr and F. The alkaline metasomatic alterations mostly frame the Korsun-Novomyrgorod Pluton and, believably, were formed during crust extension at the beginning development of the "hot spot" which resulted in emplacement of the Korsun-Novomyrgorod Pluton. Product Description popup.authors Ємець Олександр Вікторович Веліканов Юрій Федорович Великанова Ольга Юріївна Степанюк Леонід Михайлович Шумлянський Леонід Владиславович popup.nrat_date 2020-04-02 Close