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Tungsten isotope evidence that mantle plumes contain no contribution from the Earths core

Schersten, Anders; Elliott, Tim; Hawkesworth, Chris; Norman, Marc

Description

Osmium isotope ratios provide important constraints on the sources of ocean-island basalts, but two very different models have been put forward to explain such data. One model interprets187Os-enrichments in terms of a component of recycled oceanic crust within the source material. The other model infers that interaction of the mantle with the Earth's outer core produces the isotope anomalies and, as a result of coupled186Os-187Os anomalies, put time constraints on inner-core formation. Like...[Show more]

CollectionsANU Research Publications
Date published: 2004
Type: Journal article
URI: http://hdl.handle.net/1885/86790
Source: Nature
DOI: 10.1038/nature02221

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