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dc.contributor.authorMatthews, Simonen
dc.contributor.authorShorttle, Oliveren
dc.contributor.authorMaclennan, Johnen
dc.date.accessioned2017-01-31T14:55:12Z
dc.date.available2017-01-31T14:55:12Z
dc.date.issued2016-12-20en
dc.identifier.issn1525-2027
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/262197
dc.description.abstractNew crystallization temperatures for four eruptions from the Northern Volcanic Zone of Iceland are determined using olivine-spinel aluminum exchange thermometry. Differences in the olivine crystallization temperatures between these eruptions are consistent with variable extents of cooling during fractional crystallization. However, the crystallization temperatures for Iceland are systematically offset to higher temperatures than equivalent olivine-spinel aluminum exchange crystallization temperatures published for MORB, an effect that cannot be explained by fractional crystallization. The highest observed crystallization temperature in Iceland is 1399 ± 20°C. In order to convert crystallization temperatures to mantle potential temperature, we developed a model of multilithology mantle melting that tracks the thermal evolution of the mantle during isentropic decompression melting. With this model, we explore the controls on the temperature at which primary melts begin to crystallize, as a function of source composition and the depth from which the magmas are derived. Large differences (200°C) in crystallization temperature can be generated by variations in mantle lithology, a magma's inferred depth of origin, and its thermal history. Combining this model with independent constraints on the magma volume flux and the effect of lithological heterogeneity on melt production, restricted regions of potential temperature-lithology space can be identified as consistent with the observed crystallization temperatures. Mantle potential temperature is constrained to be 1480−30+37 °C for Iceland and 1318−32+44 °C for MORB.
dc.description.sponsorshipO.S. was supported by a Title A Fellowship from Trinity College Cambridge and a Geology Option Postdoctoral Fellowship at Caltech.
dc.language.isoenen
dc.publisherWiley
dc.titleThe temperature of the Icelandic mantle from olivine-spinel aluminum exchange thermometryen
dc.typeArticle
prism.endingPage4752
prism.issueIdentifier11en
prism.publicationDate2016en
prism.publicationNameGeochemistry, Geophysics, Geosystemsen
prism.startingPage4725
prism.volume17en
dc.identifier.doi10.17863/CAM.7454
dcterms.dateAccepted2016-11-03en
rioxxterms.versionofrecord10.1002/2016GC006497en
rioxxterms.versionVoRen
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2016-12-20en
dc.contributor.orcidMatthews, Simon [0000-0003-1796-9662]
dc.contributor.orcidShorttle, Oliver [0000-0002-8713-1446]
dc.contributor.orcidMaclennan, John [0000-0001-6857-9600]
dc.identifier.eissn1525-2027
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idNERC (via University of Oxford) (NE/M000427/1 - DGR00210)
pubs.funder-project-idNERC (NE/J021539/1)
pubs.funder-project-idNERC (NE/L002507/1)
pubs.funder-project-idNERC (NE/L002507/1)
cam.issuedOnline2016-11-07en
cam.orpheus.successThu Jan 30 12:57:23 GMT 2020 - The item has an open VoR version.*
rioxxterms.freetoread.startdate2100-01-01


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