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dc.contributor.author
Xu, Jing-Yao
dc.contributor.author
Giuliani, Andrea
dc.contributor.author
Li, Qiu-Li
dc.contributor.author
Lu, Kai
dc.contributor.author
Melgarejo, Joan Carles
dc.contributor.author
Griffin, William L.
dc.date.accessioned
2021-11-12T14:10:02Z
dc.date.available
2021-11-12T03:54:58Z
dc.date.available
2021-11-12T14:10:02Z
dc.date.issued
2021-11-02
dc.identifier.issn
2041-1723
dc.identifier.other
10.1038/s41467-021-26668-z
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/514849
dc.identifier.doi
10.3929/ethz-b-000514849
dc.description.abstract
Oxygen isotope ratios in mantle-derived magmas that differ from typical mantle values are generally attributed to crustal contamination, deeply subducted crustal material in the mantle source or primordial heterogeneities. Here we provide an alternative view for the origin of light oxygen-isotope signatures in mantle-derived magmas using kimberlites, carbonate-rich magmas that assimilate mantle debris during ascent. Olivine grains in kimberlites are commonly zoned between a mantle-derived core and a magmatic rim, thus constraining the compositions of both mantle wall-rocks and melt phase. Secondary ion mass spectrometry (SIMS) analyses of olivine in worldwide kimberlites show a remarkable correlation between mean oxygen-isotope compositions of cores and rims from mantle-like 18O/16O to lower ‘crustal’ values. This observation indicates that kimberlites entraining low-18O/16O olivine xenocrysts are modified by assimilation of low-18O/16O sub-continental lithospheric mantle material. Interaction with geochemically-enriched domains of the sub-continental lithospheric mantle can therefore be an important source of apparently ‘crustal’ signatures in mantle-derived magmas.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Nature Publishing Group
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.title
Light oxygen isotopes in mantle-derived magmas reflect assimilation of sub-continental lithospheric mantle material
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
ethz.journal.title
Nature Communications
ethz.journal.volume
12
en_US
ethz.journal.abbreviated
Nat Commun
ethz.pages.start
6295
en_US
ethz.size
13 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
A new understanding of kimberlite magmas from deep Earth to diamond mines
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
London
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02725 - Institut für Geochemie und Petrologie / Institute of Geochemistry and Petrology::03592 - Schmidt, Max / Schmidt, Max
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02725 - Institut für Geochemie und Petrologie / Institute of Geochemistry and Petrology::03592 - Schmidt, Max / Schmidt, Max
ethz.grant.agreementno
180126
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
Ambizione
ethz.date.deposited
2021-11-12T03:55:01Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-11-12T14:10:13Z
ethz.rosetta.lastUpdated
2022-03-29T15:59:54Z
ethz.rosetta.versionExported
true
ethz.COinS
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