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dc.contributor.authorRollinson, Hugh
dc.contributor.authorAdetunji, Jacob
dc.contributor.authorLenaz, Davide
dc.contributor.authorSzilas, Kristoffer
dc.date.accessioned2017-04-13T14:56:27Z
dc.date.available2017-04-13T14:56:27Z
dc.date.issued2017-03-29
dc.identifier.citationRollinson, H. et al (2017) 'Archaean chromitites show constant Fe 3+ /ΣFe in Earth's asthenospheric mantle since 3.8 Ga', Lithos, 282-283:316en
dc.identifier.issn244937
dc.identifier.doi10.1016/j.lithos.2017.03.020
dc.identifier.urihttp://hdl.handle.net/10545/621549
dc.description.abstractTheoretical and planetary studies show that the Earth’s upper mantle is more oxidised than it should be. The mechanism by which this took place and the timing of the oxidation is contested. Here we present new Mössbauer spectroscopy measurements of the ionic ratio Fe3+/(Fe3++Fe2+) in the mineral chromite hosted in mantle-derived melts to show that there is no change in mantle Fe3+/(Fe3++Fe2+) ratio before and after the oxidation of the Earth’s atmosphere at ca. 2.4 Ga and over Earth history from 3.8 Ga to 95 Ma. Our finding supports the view that the oxidation of the asthenospheric mantle was very early and that the oxygenation of the Earth’s atmosphere was not directly coupled to mantle processes.
dc.description.sponsorshipUoDen
dc.language.isoenen
dc.publisherElsevieren
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0024493717301263en
dc.rightsArchived with thanks to Lithosen
dc.subjectArchaeanen
dc.subjectChromiteen
dc.subjectMantle redoxen
dc.subjectGeologyen
dc.titleArchaean chromitites show constant Fe 3+ /ΣFe in Earth's asthenospheric mantle since 3.8 Gaen
dc.typeArticleen
dc.contributor.departmentUniversity of Derbyen
dc.contributor.departmentUniversity of Triesteen
dc.contributor.departmentGeological Survey of Denmark and Greenlanden
dc.identifier.journalLithosen
dcterms.dateAccepted2017-03-23
html.description.abstractTheoretical and planetary studies show that the Earth’s upper mantle is more oxidised than it should be. The mechanism by which this took place and the timing of the oxidation is contested. Here we present new Mössbauer spectroscopy measurements of the ionic ratio Fe3+/(Fe3++Fe2+) in the mineral chromite hosted in mantle-derived melts to show that there is no change in mantle Fe3+/(Fe3++Fe2+) ratio before and after the oxidation of the Earth’s atmosphere at ca. 2.4 Ga and over Earth history from 3.8 Ga to 95 Ma. Our finding supports the view that the oxidation of the asthenospheric mantle was very early and that the oxygenation of the Earth’s atmosphere was not directly coupled to mantle processes.


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