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Article: Trace-element characteristics of east–west mantle geochemical hemispheres

TitleTrace-element characteristics of east–west mantle geochemical hemispheres
Authors
Iwamori, HNakamura, HYoshida, MNakagawa, TUeki, KNakao, ANishizawa, THaraguchi, S
KeywordsMantle
Hemisphere
Isotope
Trace element
Fluid
Issue Date2019
PublisherElsevier Masson. The Journal's web site is located at http://www.elsevier.com/locate/crte
Citation
Comptes Rendus Geoscience, 2019, v. 351 n. 2-3, p. 209-220 How to Cite?
DOI: http://dx.doi.org/10.1016/j.crte.2018.09.007
AbstractRecent statistical analyses on the isotopic compositions of oceanic, arc, and continental basalts have revealed that the Earth's mantle is broadly divided into eastern and western hemispheres. The present study aimed to characterize the isotopically defined east–west geochemical hemispheres using trace-element concentrations. Basalt data with Rb, Sr, Nd, Sm, Pb, Th, and U in addition to the isotopic ratios 87Sr/86Sr, 143Nd/144Nd, 206Pb/204Pb, 207Pb/204Pb, and 208Pb/204Pb were selected mostly from the GEOROC and PetDB databases. A total of 4787 samples were used to investigate the global geochemical variations. The results show that the wide trace-element variations are broadly explained by the melting of melt-metasomatized and fluid-metasomatized mantle sources. The larger amount of the fluid component derived from subducted plates in the eastern hemisphere than that in the western hemisphere is inferred from the basalts. These characteristics support the hypothesis that focused subduction towards the supercontinent created the mantle geochemical hemispheres.
Persistent Identifierhttp://hdl.handle.net/10722/274969
ISSN
1631-0713
2021 Impact Factor: 1.424
2020 SCImago Journal Rankings: 0.580
ISI Accession Number ID
WOS:000467375300019

 

DC FieldValueLanguage
dc.contributor.authorIwamori, H-
dc.contributor.authorNakamura, H-
dc.contributor.authorYoshida, M-
dc.contributor.authorNakagawa, T-
dc.contributor.authorUeki, K-
dc.contributor.authorNakao, A-
dc.contributor.authorNishizawa, T-
dc.contributor.authorHaraguchi, S-
dc.date.accessioned2019-09-10T02:32:40Z-
dc.date.available2019-09-10T02:32:40Z-
dc.date.issued2019-
dc.identifier.citationComptes Rendus Geoscience, 2019, v. 351 n. 2-3, p. 209-220-
dc.identifier.issn1631-0713-
dc.identifier.urihttp://hdl.handle.net/10722/274969-
dc.description.abstractRecent statistical analyses on the isotopic compositions of oceanic, arc, and continental basalts have revealed that the Earth's mantle is broadly divided into eastern and western hemispheres. The present study aimed to characterize the isotopically defined east–west geochemical hemispheres using trace-element concentrations. Basalt data with Rb, Sr, Nd, Sm, Pb, Th, and U in addition to the isotopic ratios 87Sr/86Sr, 143Nd/144Nd, 206Pb/204Pb, 207Pb/204Pb, and 208Pb/204Pb were selected mostly from the GEOROC and PetDB databases. A total of 4787 samples were used to investigate the global geochemical variations. The results show that the wide trace-element variations are broadly explained by the melting of melt-metasomatized and fluid-metasomatized mantle sources. The larger amount of the fluid component derived from subducted plates in the eastern hemisphere than that in the western hemisphere is inferred from the basalts. These characteristics support the hypothesis that focused subduction towards the supercontinent created the mantle geochemical hemispheres.-
dc.languageeng-
dc.publisherElsevier Masson. The Journal's web site is located at http://www.elsevier.com/locate/crte-
dc.relation.ispartofComptes Rendus Geoscience-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectMantle-
dc.subjectHemisphere-
dc.subjectIsotope-
dc.subjectTrace element-
dc.subjectFluid-
dc.titleTrace-element characteristics of east–west mantle geochemical hemispheres-
dc.typeArticle-
dc.identifier.emailNakagawa, T: ntakashi@hku.hk-
dc.identifier.authorityNakagawa, T=rp02470-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1016/j.crte.2018.09.007-
dc.identifier.scopuseid_2-s2.0-85058369192-
dc.identifier.hkuros303343-
dc.identifier.volume351-
dc.identifier.issue2-3-
dc.identifier.spage209-
dc.identifier.epage220-
dc.identifier.isiWOS:000467375300019-
dc.publisher.placeFrance-
dc.identifier.issnl1631-0713-

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