Hf, Ta, and REE distributions between the carbonatite and syenitic rocks suggest that the carbonatite was derived by liquid immiscibility from a Co(_2) saturated phonolitic magma, with the conjugate silicate phase possibly intruded as the Xenolithic Porphyritc Syenite. Patchy metasomatic alteration has affected all units steroids, and has given rise to the Coarse Grained Brown […]