Sulfur-controlled iron isotope fractionation experiments of core formation in planetary bodies

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dc.citation.journalTitleGEOCHIMICA ET COSMOCHIMICA ACTA
dc.contributor.authorShahar A.
dc.contributor.authorHillgren V.J.
dc.contributor.authorHoran M.F.
dc.contributor.authorMesa-Garcia J.
dc.contributor.authorKaufman L.A.
dc.contributor.authorMock T.D.
dc.contributor.departmentUniversidad EAFIT. Departamento de Cienciasspa
dc.contributor.researchgroupGeología Ambiental y Tectónicaspa
dc.creatorShahar A.
dc.creatorHillgren V.J.
dc.creatorHoran M.F.
dc.creatorMesa-Garcia J.
dc.creatorKaufman L.A.
dc.creatorMock T.D.
dc.date.accessioned2021-03-26T21:25:57Z
dc.date.available2021-03-26T21:25:57Z
dc.date.issued2015-01-01
dc.description.abstractA series of high pressure and temperature experiments were conducted to better constrain the Fe isotope fractionation during core-mantle differentiation in planetesimal and planetary bodies. Synthetic mixtures of oxides and metal having varying amounts of sulfur, approximating terrestrial and Martian compositions, were melted at 1-2GPa and 1650°C. Iron isotopic equilibrium between the resulting metal and glass run products was verified for all experiments using the three-isotope technique. Purified Fe from metal and glass was analyzed by multiple-collector ICP-MS in high resolution mode. Iron alloy and silicate glass show a well-resolved d57Femetal-silicate of +0.12±0.04‰ in a sulfur-free system. Isotope fractionation increases with sulfur content to +0.43±0.03‰ at 18wt.% sulfur in the metal. These results cannot be easily interpreted within the context of known Fe isotope ratios in most natural samples of planetary and asteroidal mantles and therefore suggest more complex processes affected the Fe isotope fractionation therein. However, to reconcile Martian meteorite iron isotopic signatures with geophysical models using this new experimental data requires a smaller amount of sulfur in the Martian core than previous estimates, with an upper limit of ~8wt.%. © 2014 Elsevier Ltd.eng
dc.identifierhttps://eafit.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=8797
dc.identifier.doi10.1016/j.gca.2014.08.011
dc.identifier.issn00167037
dc.identifier.issn18729533
dc.identifier.otherWOS;000348511300015
dc.identifier.otherSCOPUS;2-s2.0-84921460112
dc.identifier.urihttp://hdl.handle.net/10784/27246
dc.languageeng
dc.language.isoengeng
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD
dc.relation.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84921460112&doi=10.1016%2fj.gca.2014.08.011&partnerID=40&md5=3dba6e13cc11635ce84113e9e0eb6cba
dc.rightshttps://v2.sherpa.ac.uk/id/publication/issn/0016-7037
dc.sourceGEOCHIMICA ET COSMOCHIMICA ACTA
dc.subjectColombiaeng
dc.subjectGeoparkseng
dc.subjectGeoturismeng
dc.subjectMagdalena medioeng
dc.subjectSustainable development goalseng
dc.titleSulfur-controlled iron isotope fractionation experiments of core formation in planetary bodieseng
dc.typearticleeng
dc.typeinfo:eu-repo/semantics/articleeng
dc.typeinfo:eu-repo/semantics/publishedVersioneng
dc.typepublishedVersioneng
dc.type.localArtículospa

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