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Nature Geoscience 1, 812–813 (1 December 2008) | doi:10.1038/ngeo372

Chemical geodynamics: The enduring lead paradox

Albrecht W. Hofmann

The isotopic composition of lead in the rocks of the Earth as a whole has been the source of enduring mystery. This is basically because the lead in known large-scale rock reservoirs is all a little too radiogenic.