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dc.contributor.authorGamal El Dien, H.
dc.contributor.authorArai, S.
dc.contributor.authorDoucet, L.S.
dc.contributor.authorLi, Zheng-Xiang
dc.contributor.authorKil, Y.
dc.contributor.authorFougerouse, Denis
dc.contributor.authorReddy, Steven
dc.contributor.authorSaxey, David
dc.contributor.authorHamdy, M.
dc.date.accessioned2020-05-21T03:22:11Z
dc.date.available2020-05-21T03:22:11Z
dc.date.issued2019
dc.identifier.citationGamal El Dien, H. and Arai, S. and Doucet, L.S. and Li, Z.X. and Kil, Y. and Fougerouse, D. and Reddy, S.M. et al. 2019. Cr-spinel records metasomatism not petrogenesis of mantle rocks. Nature Communications. 10 (1): ARTN 5103.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/79360
dc.identifier.doi10.1038/s41467-019-13117-1
dc.description.abstract

Mantle melts provide a window on processes related to global plate tectonics. The composition of chromian spinel (Cr-spinel) from mafic-ultramafic rocks has been widely used for tracing the geotectonic environments, the degree of mantle melting and the rate of mid-ocean ridge spreading. The assumption is that Cr-spinel’s core composition (Cr# = Cr/(Cr + Al)) is homogenous, insensitive to post-formation modification and therefore a robust petrogenetic indicator. However, we demonstrate that the composition of Cr-spinel can be modified by fluid/melt-rock interactions in both sub-arc and sub-mid oceanic mantle. Metasomatism can produce Al-Cr heterogeneity in Cr-spinel that lowers the Cr/Al ratio, and therefore modifies the Cr#, making Cr# ineffective as a geotectonic and mantle melting indicator. Our analysis also demonstrates that Cr-spinel is a potential sink for fluid-mobile elements, especially in subduction zone environments. The heterogeneity of Cr# in Cr-spinel can, therefore, be used as an excellent tracer for metasomatic processes.

dc.languageEnglish
dc.publisherNATURE PUBLISHING GROUP
dc.relation.sponsoredbyhttp://purl.org/au-research/grants/arc/FL150100133
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectScience & Technology
dc.subjectMultidisciplinary Sciences
dc.subjectScience & Technology - Other Topics
dc.subjectMID-ATLANTIC RIDGE
dc.subjectANDESITIC AVACHA VOLCANO
dc.subjectMARIANA FORE-ARC
dc.subjectPERIDOTITE XENOLITHS
dc.subjectSERPENTINIZED PERIDOTITES
dc.subjectABYSSAL PERIDOTITES
dc.subjectSPREADING RIDGE
dc.subjectEASTERN DESERT
dc.subjectWEDGE BENEATH
dc.subjectKAMCHATKA ARC
dc.titleCr-spinel records metasomatism not petrogenesis of mantle rocks
dc.typeJournal Article
dcterms.source.volume10
dcterms.source.number1
dcterms.source.issn2041-1723
dcterms.source.titleNature Communications
dc.date.updated2020-05-21T03:22:07Z
curtin.departmentSchool of Earth and Planetary Sciences (EPS)
curtin.departmentJohn de Laeter Centre (JdLC)
curtin.accessStatusOpen access
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidReddy, Steven [0000-0002-4726-5714]
curtin.contributor.orcidLi, Zheng-Xiang [0000-0003-4350-5976]
curtin.contributor.orcidSaxey, David [0000-0001-7433-946X]
curtin.contributor.researcheridReddy, Steven [A-9149-2008]
curtin.contributor.researcheridLi, Zheng-Xiang [B-8827-2008]
curtin.contributor.researcheridSaxey, David [H-5782-2014]
curtin.identifier.article-numberARTN 5103
dcterms.source.eissn2041-1723
curtin.contributor.scopusauthoridReddy, Steven [7402263354]
curtin.contributor.scopusauthoridLi, Zheng-Xiang [57192954386] [57198889498] [7409074764]
curtin.contributor.scopusauthoridFougerouse, Denis [56418452200]
curtin.contributor.scopusauthoridSaxey, David [15059256300]


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