Аннотация:At temperature 600 oC and pressure 2 kbar, zircon- and titanosilicates were synthesized in the presenceof fluids of varying alkalinity. Such parageneses are observed in postmagmatic formations of the Khibiny and Lovozero ultra-agpaitic complexes. The duration of the experiments was 10 days. The following mineral-like phases were diagnosed in the experimental products using electron probe microanalysis and X-ray fluorescence: minerals of the eudialyte group, minerals of the lovozerite group, parakeldyshite, occurring in ultra-alkaline postmagmatic formations.
