Comparative geological and geochemical assessment of the ore potential of granitoids and productivity of W-Sn mineralization (Central Europe, Transbaikalia, and Chukchi region)

A detailed geological and geochemical comparison of ore-bearing granitoids and the intensities of associated mineralization has been carried out for t hree W-Sn-ore provinces (Erzgebirge, Central Europe; Transbaikalia and Chuk chi region, Russia). It has been established that granites productive of Sn -W-rare-metal mineralization are differentiates of intrusive systems which were Initially specialized in terms of geochemistry and metallogeny. They a re rich in volatiles and trace granitophile elements, the major ones being B, F, Li, Rb, Cs, Be, Sn, W, Mo, and Pb. As these intrusive systems evolve, the concentrations of granitophile elements in granites of successive intr usive phases gradually grow, drastically increasing in late ultrarare-metal leucogranites productive of W-Sn mineralization. It is shown that differen tiates of such late ultrarare-metal leucogranites are indicators of associa ted W-Sn mineralization, whose productivity (volume and quality of ores) de pends mainly on the total volume of these leucogranites, which is proportio nal to the total volume of the intrusive systems.