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dc.contributor.authorPrytulak, J.
dc.contributor.authorSossi, P. A.
dc.contributor.authorHalliday, A. N.
dc.contributor.authorPlank, T.
dc.contributor.authorSavage, P. S.
dc.contributor.authorWoodhead, J. D.
dc.date.accessioned2017-05-09T11:30:16Z
dc.date.available2017-05-09T11:30:16Z
dc.date.issued2016-10-26
dc.identifier.citationPrytulak , J , Sossi , P A , Halliday , A N , Plank , T , Savage , P S & Woodhead , J D 2016 , ' Stable vanadium isotopes as a redox proxy in magmatic systems ' , Geochemical Perspectives Letters , vol. 3 , no. 1 . https://doi.org/10.7185/geochemlet.1708en
dc.identifier.issn2410-339X
dc.identifier.otherPURE: 249951606
dc.identifier.otherPURE UUID: 3ac90930-4fea-492e-bff6-f3852fba7609
dc.identifier.otherScopus: 85028264042
dc.identifier.otherORCID: /0000-0001-8464-0264/work/64034622
dc.identifier.otherWOS: 000389445900008
dc.identifier.urihttps://hdl.handle.net/10023/10730
dc.descriptionJP was funded by NERC postdoctoral fellowship NE/H01313X/2, with support of the Oxford laboratories from an Advanced ERC grant (NEWISOTOPEGEOSCIENCE) to ANH. PAS by an APA PhD scholarship and ANU Vice-Chancellor’s Scholarship.en
dc.description.abstractRecycling pathways of multivalent elements, that impact our understanding of diverse geological processes from ore formation to the rise of atmospheric oxygen, depend critically on the spatial and temporal variation of oxygen fugacity (fO2) in the Earth’s interior. Despite its importance, there is currently no consensus on the relative fO2 of the mantle source of mid-ocean ridge basalts compared to the sub-arc mantle, regions central to the mediation of crust-mantle mass balances. Here we present the first stable vanadium isotope measurements of arc lavas, complemented by non-arc lavas and two co-genetic suites of fractionating magmas, to explore the potential of V isotopes as a redox proxy. Vanadium isotopic compositions of arc and non-arc magmas with similar MgO overlap with one another. However, V isotopes display strikingly large, systematic variations of ~2 ‰ during magmatic differentiation in both arc and non-arc settings. Calculated bulk V Rayleigh fractionation factors (1000 lnαmin-melt of -0.4 to -0.5 ‰) are similar regardless of the oxidation state of the evolving magmatic system, which implies that V isotope fractionation is most influenced by differences in bonding environment between minerals and melt rather than changes in redox conditions. Thus, although subtle fO2 effects may be present, V isotopes are not a direct proxy for oxygen fugacity in magmatic systems.
dc.format.extent5
dc.language.isoeng
dc.relation.ispartofGeochemical Perspectives Lettersen
dc.rights© 2016 The Authors. This work is distributed under the Creative Commons Attribution 4.0 License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Additional information is available at http://www. geochemicalperspectivesletters.org/copyright-and-permissions.en
dc.subjectVanadiumen
dc.subjectStable isotopesen
dc.subjectMagmatic fractionationen
dc.subjectOxygen fugacityen
dc.subjectMagnetiteen
dc.subjectGE Environmental Sciencesen
dc.subjectQD Chemistryen
dc.subjectNDASen
dc.subject.lccGEen
dc.subject.lccQDen
dc.titleStable vanadium isotopes as a redox proxy in magmatic systemsen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. St Andrews Centre for Exoplanet Scienceen
dc.contributor.institutionUniversity of St Andrews. Earth and Environmental Sciencesen
dc.contributor.institutionUniversity of St Andrews. St Andrews Isotope Geochemistryen
dc.identifier.doihttps://doi.org/10.7185/geochemlet.1708
dc.description.statusPeer revieweden


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