СОСТАВ И УСЛОВИЯ ФОРМИРОВАНИЯ ТИТАНО-МАГНЕТИТ-ИЛЬМЕНИТОВОГО ОРУДЕНЕНИЯ В ДВУПИРОКСЕНОВОМ ГАББРО МЕДВЕДЕВСКОГО МЕСТОРОЖДЕНИЯ (ЮЖНЫЙ УРАЛ). II. СТАДИЙНОСТЬ РУДООБРАЗОВАНИЯ КАК РЕЗУЛЬТАТ ЭВОЛЮЦИИ РУДОНОСНОГО РАСПЛАВА

On the base of new petrochemical and geochemical data with specificity in the compositions of rock-forming and ore minerals was determined the conditions of formation of Ti-Fe-V mineralization in the two-pyroxene gabbro of Medvedevskoe deposit. Two stages of formation of abundant mineralization were distinguished. They occur in the rhythmically stratified amphibole-saussuritizated gabbro of early cumulatively-magmatic stage and in the late-magmatic (subsolidus) stage. Staging of ore-genesis during the late-magmatic phase is related to the non-equilibrium of residual fluidized melt enriched with water and chlorine to the previously extracted rock-forming and ore minerals (pyroxene, plagioclase, titanomagnetite and ilmenite) which formed a primary magmatic frame and layering of ore-bearing rocks.