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News and Views
Nature 443, 516-517 (5 October 2006) | doi:10.1038/443516a; Published online 4 October 2006
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Earth Science: Lost lithium found
Elisabeth Widom1
Abstract
Lithium isotopes provide a fingerprint of recycled material in Earth's upper mantle. But this fingerprint is different from what had been expected. So do we need to reassess our ideas about how the upper mantle evolves?
Earth's interior is thought to evolve through two complementary processes: the production of crust at the surface by convection and resultant partial melting of the underlying mantle, and the return of the crust to the mantle through subduction. The precise nature of this recycling process, including the ultimate fate of recycled crust and its influence on the evolution of Earth's upper mantle, is unclear.
- Elisabeth Widom is in the Department of Geology, Miami University, Oxford, Ohio 45056, USA.
Email: widome@muohio.edu
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