Uncommon-earth Magnet Wikipedia
In a companion manuscript, Aide et al. applied Ti as an immobile index to indicate that the REE have been partially depleted from the soil profiles relative to the host rock. Nesbitt in a pioneering study involving soils developed in granodiorite proposed that CO2 and organic matter bearing soil waters percolated through the soil profiles, removing the REEs as carbonate complexes. The REEs were removed from the percolating soil water in deeper, less weathered and significantly less acidic granodiorite components…