Figure 2. Scheme showing geologic structure of the Kovdor massif, simplified after [Ternovoi, 1977]. 1 - carbonatite, 2 - phoscorite, 3 - nepheline syenite, 4 - foidolite, 5 - olivine-diopside-phlogopite rocks, 6 - olivine-monticellite-melilite rocks, 7 - melilite rocks, 8 - pyroxenite, 9 - peridotite and dunite, 10 - Precambrian basement.