Figure 2. Schematic maps showing the geologic structure of the Kola carbonatite massifs, modified after Ternovoi [1977] and Kogarko et al. [1995]: (1) phoscorite, (2) carbonatite, (3) nepheline syenite, (4) ijolite, (5) melteigite, (6) melilite rocks, (7) melilite-monticellite-olivine rocks, (8) phlogopite-diopside-olivine rocks, (9) pyroxenite, (10) peridotite and dunite. The A-B lines show the orientations of the density sections given in Figure 3.