Unradiogenic lead in Earth’s upper mantle

Burton, Kevin; Cenki-Tok, Bénédicte; Mokadem, Fatima; Harvey, Jason; Gannoun, Abdelmouhcine; Alard, Olivier and Parkinson, Ian J. (2012). Unradiogenic lead in Earth’s upper mantle. Nature Geoscience, 5(8) pp. 570–573.

DOI: https://doi.org/10.1038/ngeo1531

Abstract

The mantle and continental crust contain excessive amounts of radiogenic lead, implying that a complementary reservoir of unradiogenic lead should exist somewhere on Earth. Isotopic analyses of mantle rocks exposed on the Atlantic Ocean floor reveal that sulphide inclusions can have extremely unradiogenic lead compositions, suggesting that the reservoir could exist within the mantle itself.

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