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Seawater cycled throughout Earth's mantle in partially serpentinized lithosphere


Kendrick, MA and Hemond, C and Kamenetsky, VS and Danyushevsky, LV and Devey, CW and Rodemann, T and Jackson, MG and Perfit, MR, Seawater cycled throughout Earth's mantle in partially serpentinized lithosphere, Nature Geoscience, 10, (3) pp. 222-228. ISSN 1752-0894 (2017) [Refereed Article]

Copyright Statement

2017 Macmillan Publishers

DOI: doi:10.1038/ngeo2902


The extent to which water and halogens in Earth's mantle have primordial origins, or are dominated by seawater-derived components introduced by subduction is debated. About 90% of non-radiogenic xenon in the Earth's mantle has a subducted atmospheric origin, but the degree to which atmospheric gases and other seawater components are coupled during subduction is unclear. Here we present the concentrations of water and halogens in samples of magmatic glasses collected from mid-ocean ridges and ocean islands globally. We show that water and halogen enrichment is unexpectedly associated with trace element signatures characteristic of dehydrated oceanic crust, and that the most incompatible halogens have relatively uniform abundance ratios that are different from primitive mantle values. Taken together, these results imply that Earth's mantle is highly processed and that most of its water and halogens were introduced by the subduction of serpentinized lithospheric mantle associated with dehydrated oceanic crust.

Item Details

Item Type:Refereed Article
Keywords:seawater, lithosphere, mantle, xenon, element cycles, geochemistry, geodynamics
Research Division:Earth Sciences
Research Group:Geochemistry
Research Field:Geochemistry not elsewhere classified
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the earth sciences
UTAS Author:Kamenetsky, VS (Professor Vadim Kamenetsky)
UTAS Author:Danyushevsky, LV (Professor Leonid Danyushevsky)
UTAS Author:Rodemann, T (Dr Thomas Rodemann)
ID Code:116475
Year Published:2017
Funding Support:Australian Research Council (DP130100257)
Web of Science® Times Cited:93
Deposited By:Earth Sciences
Deposited On:2017-05-10
Last Modified:2018-04-24

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