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Deep mantle storage of the Earth's missing niobium in late-stage residual melts from a magma ocean

Nebel, Oliver; van Westrenen, Wim; Vroon, P.Z.; Wille, Martin; Raith, M.M.


The origin of the observed niobium deficit in the bulk silicate Earth (BSE) compared to chondritic meteorites constitutes a long-standing problem in geochemistry. The deficit requires a large-scale process fractionating niobium from tantalum, and a super-chondritic Nb/Ta reservoir hidden in the deep silicate Earth and/or in the metallic core. The only voluminous super-chondritic Nb/Ta silicate reservoir analysed to date is found in lunar basalts that assimilated highly evolved Fe-rich rocks...[Show more]

CollectionsANU Research Publications
Date published: 2010
Type: Journal article
Source: Geochimica et Cosmochimica Acta
DOI: 10.1016/j.gca.2010.04.061


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