ArticleScience advances2026
Dual Nd isotopic archives in fossil teeth reveal bottom-current control of rare-earth element enrichment in deep-sea sediments.
Article in Science advances, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The global emergence of deep-sea sediments enriched in rare-earth elements and yttrium (REY) after the Late Eocene cooling coincides spatiotemporally with Antarctic bottom water (AABW) expansion, yet the underlying mechanism remains unresolved. Here, we present in situ elemental and neodymium isotopic analyses of apatites extracted from Oligocene-Miocene sediments along the North Pacific AABW pathway. Results show ∼90% of the REY budget resides in inner dentin of fossil teeth. The dentin and coexisting authigenic fluorapatites display similar ε
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