Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/4840
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dc.contributor.authorallBaker, D. R.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.date.accessioned2008-12-16T07:40:37Zen
dc.date.available2008-12-16T07:40:37Zen
dc.date.issued2008-09en
dc.identifier.urihttp://hdl.handle.net/2122/4840en
dc.description.abstractA series of experiments created melt inclusions in plagioclase and pyroxene crystals grown from a basaltic melt at 1,150 C, 1.0 GPa to investigate diffusive fractionation during melt inclusion formation; additionally, P diffusion in a basaltic melt was measured at 1.0 GPa. Melt inclusions and melts within a few 100 microns of plagioclase– melt interfaces were analyzed for comparison with melt compositions far from the crystals. Melt inclusions and melt compositions in the boundary layer close to the crystal–melt interface were similar, but both differ significantly in incompatible element concentrations from melt found greater than approximately 200 microns away from the crystals. The compositional profiles of S, Cl, P, Fe, and Al in the boundary layers were successfully reproduced by a two-step model of rapid crystal growth followed by diffusive relaxation toward equilibrium after termination of crystal growth. Applying this model to investigate possible incompatible element enrichment in natural melt inclusions demonstrated that at growth rates high enough to create the conditions for melt inclusion formation, *10-9–10-8 m s-1, the concentration of water in the boundary layer near the crystal was similar to that of the bulk melt because of its high diffusion coefficient, but sulfur, with a diffusivity similar to major elements and CO2, was somewhat enriched in the boundary layer melt, and phosphorus, with its low diffusion coefficient similar to other high-field strength elements and rare earth elements, was significantly enriched. Thus, the concentrations of sulfur and phosphorus in melt inclusions may over-estimate their values in the bulk melt, and other elements with similar diffusion coefficients may also be enriched in melt inclusions relative to the bulk melt.en
dc.description.sponsorshipNatural Sciences and Engineering Research Council of Canada Discovery grant; Istituto Nazionale di Geofisica and Vulcanologia, Italyen
dc.language.isoEnglishen
dc.publisher.nameSpringeren
dc.relation.ispartofContribution to Mineralogy and Petrologyen
dc.relation.ispartofseries3/156(2008)en
dc.subjectMelt inclusionsen
dc.subjectPhosphorus diffusionen
dc.subjectCrystal growthen
dc.subjectDiffusive Fractionationen
dc.titleThe fidelity of melt inclusions as records of melt compositionen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber377-395en
dc.identifier.URLhttp://scienceserver.cilea.it/pdflinks/08111516110425259.pdfen
dc.subject.INGV04. Solid Earth::04.08. Volcanology::04.08.03. Magmasen
dc.identifier.doi10.1007/s00410-008-0291-3en
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dc.description.obiettivoSpecifico2.3. TTC - Laboratori di chimica e fisica delle rocceen
dc.description.journalTypeJCR Journalen
dc.description.fulltextreserveden
dc.contributor.authorBaker, D. R.en
item.openairetypearticle-
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item.languageiso639-1en-
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crisitem.classification.parent04. Solid Earth-
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