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dc.contributor.authorSievwright, RH
dc.contributor.authorWilkinson, JJ
dc.contributor.authorO'Neill, HSC
dc.contributor.authorBerry, AJ
dc.date.accessioned2020-05-26T14:12:44Z
dc.date.available2020-05-26T14:12:44Z
dc.date.issued2017-07-07
dc.date.submitted2017-07-10
dc.identifier.citationSievwright, R.H., Wilkinson, J.J., O’Neill, H.S.C. et al. Thermodynamic controls on element partitioning between titanomagnetite and andesitic–dacitic silicate melts. Contrib Mineral Petrol 172, 62 (2017). https://doi.org/10.1007/s00410-017-1385-6en_US
dc.identifier.issn0010-7999
dc.identifier.doi10.1007/s00410-017-1385-6
dc.identifier.urihttp://hdl.handle.net/10141/622768
dc.description.abstractTitanomagnetite–melt partitioning of Mg, Mn, Al, Ti, Sc, V, Co, Ni, Cu, Zn, Ga, Zr, Nb, Mo, Hf and Ta was investigated experimentally as a function of oxygen fugacity (fO2) and temperature (T) in an andesitic–dacitic bulk-chemical compositional range. In these bulk systems, at constant T, there are strong increases in the titanomagnetite–melt partitioning of the divalent cations (Mg2+, Mn2+, Co2+, Ni2+, Zn2+) and Cu2+/Cu+ with increasing fO2 between 0.2 and 3.7 log units above the fayalite–magnetite–quartz buffer. This is attributed to a coupling between magnetite crystallisation and melt composition. Although melt structure has been invoked to explain the patterns of mineral–melt partitioning of divalent cations, a more rigorous justification of magnetite–melt partitioning can be derived from thermodynamic principles, which accounts for much of the supposed influence ascribed to melt structure. The presence of magnetite-rich spinel in equilibrium with melt over a range of fO2 implies a reciprocal relationship between a(Fe2+O) and a(Fe3+O1.5) in the melt. We show that this relationship accounts for the observed dependence of titanomagnetite–melt partitioning of divalent cations with fO2 in magnetite-rich spinel. As a result of this, titanomagnetite–melt partitioning of divalent cations is indirectly sensitive to changes in fO2 in silicic, but less so in mafic bulk systems.en_US
dc.language.isoenen_US
dc.publisherSpringerLinken_US
dc.relation.urihttp://rdcu.be/t09Aen_US
dc.rightsopenAccessen_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.titleThermodynamic controls on element partitioning between titanomagnetite and andesitic–dacitic silicate meltsen_US
dc.typeJournal Articleen_US
dc.identifier.eissn1432-0967
dc.identifier.journalContributions to Mineralogy and Petrologyen_US
dc.identifier.volume172en_US
dc.identifier.issue8en_US
dc.identifier.startpage62en_US
dc.internal.reviewer-noteContributions to Mineralogy and Petrologyen
pubs.organisational-group/Natural History Museum
pubs.organisational-group/Natural History Museum/Science Group
pubs.organisational-group/Natural History Museum/Science Group/Earth Sciences
pubs.organisational-group/Natural History Museum/Science Group/Earth Sciences/Economic and Environmental Earth Sciences
pubs.organisational-group/Natural History Museum/Science Group/Functional groups
pubs.organisational-group/Natural History Museum/Science Group/Functional groups/Research
dc.embargoNot knownen_US
elements.import.authorSievwright, RHen_US
elements.import.authorWilkinson, JJen_US
elements.import.authorO’Neill, HSCen_US
elements.import.authorBerry, AJen_US
dc.description.nhmOpen Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The attached file is the published pdf.en_US
dc.subject.nhmMagnetiteen_US
dc.subject.nhmTrace-element partitioningen_US
dc.subject.nhmAndesiteen_US
dc.subject.nhmDaciteen_US
dc.subject.nhmOxygen fugacityen_US
dc.subject.nhmPetrogenetic indicatoren_US
refterms.dateFOA2020-05-26T14:12:44Z


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