Fluorine and chlorine distribution in rocks of the Il'menskie Gory complex

The F and Cl distribution in rock-forming minerals from metamorphic and gra nitic rocks of the Il'menskie Gory complex in the southern Urals has been s tudied. The chlorophile-fluorophile specialization of these rocks is contro lled to a considerable degree by the participation of mantle material in th eir formation. The contribution of chlorine indicates that the protolith of metamorphic rocks and the source of granitoids had a mantle origin. The ba lance of halogens in metamorphic and granitic rocks shows that Cl and F are concentrated in apatite, hornblende, and biotite, while feldspars, quartz, and, sometimes, biotite and amphibole have relatively low contents of thes e elements. Fluorite and topaz are main concentrators and carriers of fluor ine in pegmatites.