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Information × Registration Number 0203U000253, 0196U012203 , R & D reports Title Isotopic Geochemistry and Geochronology of the rare-metal granites, pegmatites and metasomatites of US popup.stage_title Head Scherbak Nicolay, Registration Date 28-01-2003 Organization nstitute of Geochemistry, Mineralogy and Ore Formation popup.description2 Features of distribution of the rare metal ore formations of the Ukrainian Shield in time and space were examined. The early epoch of the rare metal mineralization is connected with the Neoarchean granite intrusions inside zones of the tectonic-magmatic activization of the Greenstone area of the Ukrainian Shield ( the Middle Dnieper megablock). The main epoch of the rare metal formations is the Proterozoic era. Two ore stages are distinctly observed during this period of time: 1) the early stage (2,1-1,9 Ga); 2) the final stage (1,8-1,7 Ga). The rare metal bearing rock assemblage of the TREE anatectic granitoids, Li-Cs pegmatites, alkaline ultramafites and carbonatites were generated during the early stage. The rare metal leicogranite, alkaline and subalcaline gabbro-syenite rock assemblages were generated during the final stage. Product Description popup.authors popup.nrat_date 2020-04-02 Close