ABSTRACTS Institute of Experimental Mineralogy70 Hydrothermal and fluids systems

A lot of geological endogenous processes take place at high activity of fluorine. Together with some other com-ponents fluorine accumulates during the process of magma fractionation resulting in formation of leucogranites, Li-F granites and pegmatites. Evolution of the magma and separated fluids lead to next metasomatic and ore forma-tion processes. Major part of rare metal mineralization in granites, pegmatites, greisens and hydrothermal veins oc-curs at high activity of fluorine rich fluid. The quantitative characteristics of the fluorine effect in the endogenous processes are still poorly studied, and the development of experimentally calibrated geo-fluorimeters is an important task of the experimental and physicochemical petrology. Such geofluorimeters can be developed, first of all, by experimentally study of the fluo