11. Units within the complex include carbonatite , nepheline syenite, phonolite, and ijolite. 12. In Phalaborwa, South Africa it occurs as replacement of magnetite in a carbonatite . 13. A carbonatite mine is located near the town. 14. In a 1962 paper, Pecora concentrated on the carbonatite deposits in the Bearpaw Mountains. 15. The intrusive members are syenite and carbonatite . 16. The lava must have had a very low viscosity, possibly due to a carbonatite composition. 17. Carbonatite melts are often considered to have been responsible for enrichment of mantle peridotite in incompatible elements.18. The fenite zone is up to 1 km wide with a breccia zone adjacent to the carbonatite . 19. A specific type of hydrothermal alteration termed " fenitization " is typically associated with carbonatite intrusions. 20. Rare earths are contained in secondary aluminophosphates, presumably derived from weathering of the Proterozoic Mount Weld carbonatite .
