Influence of Host Marble Rocks on the Formation of Intrusive Alkaline Rocks and Carbonatites of Sangilen (E. Siberia, Russia)

The study of the O and C isotope composition calcite from nepheline syenites, ijolites carbonatites Chik intrusion intrusions Erzin–Tarbagatay group Sangilen (Eastern Siberia, Russia) showed derivation alkaline melts enriched with a carbonate component host marbleized sedimentary rocks. calculations that about 40% initial mass carbonates involved in interaction silicate have remained after decarbonation. During assimilation carbonate, an oxygen exchange took place between residual material phase. Crystallization products such hybrid magmas are carbonatite veins, calcite-rich rocks their pegmatites core.