Silicate Earth’s missing niobium may have been sequestered into asteroidal cores
Carsten Münker, Raúl O. C. Fonseca & Toni Schulz Nature Geoscience doi:10.1038/ngeo3048 LINK “Geochemical models describing the behaviour of niobium during Earth’s growth rely on the general paradigm that niobium was delivered by Earth’s asteroidal…