Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/8161
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dc.contributor.authorallMollo, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.authorallPutirka, K.; University of Californiaen
dc.contributor.authorallIezzi, G.; Università di Chietien
dc.contributor.authorallScarlato, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.date.accessioned2012-10-11T14:05:18Zen
dc.date.available2012-10-11T14:05:18Zen
dc.date.issued2013en
dc.identifier.urihttp://hdl.handle.net/2122/8161en
dc.description.abstractIn this study, we have investigated the control of cooling rate on the composition of titanomagnetite formed from a trachybasaltic melt. Results show that disequilibrium growth conditions exert a primary control on the abundance, texture, and composition of the crystals. As the degree of cooling is increased, titanomagnetites show immature textures and are progressively enriched in Al ? Mg and depleted in Ti. Thus, early-formed titanomagnetite nuclei do not re-equilibrate with the melt over faster cooling rates; instead, their compositions are far from equilibrium. On the basis of the different intra-crystal redistribution rates for Ti, Al, and Mg, we have calibrated a geospeedometer that represents the first quantitative description of the effect of cooling rate on titanomagnetite composition. This model was tested using the compositions of titanomagnetites in lava and dike samples from Mt. Etna volcano whose crystallization conditions resemble those of our experiments. Cooling rates calculated for lava samples are comparable with those measured in several volcanic complexes. At Mt. Etna, compositional variations of titanomagnetite grains from the innermost to the outermost part of a dike testify to progressively higher degrees of cooling, in agreement with numerical simulations of thermal gradients in and around magmatic intrusions.en
dc.language.isoEnglishen
dc.publisher.nameSpringer Verlag Germanyen
dc.relation.ispartofContributions to Mineralogy and Petrologyen
dc.relation.ispartofseries/165 (2013)en
dc.subjectTitanomagnetite; cooling rateen
dc.titleThe control of cooling rate on titanomagnetite composition: implications for a geospeedometry model applicable to alkaline rocks from Mt. Etna volcanoen
dc.typearticleen
dc.description.statusPublisheden
dc.description.pagenumber457-475en
dc.subject.INGV04. Solid Earth::04.04. Geology::04.04.05. Mineralogy and petrologyen
dc.identifier.doi10.1007/s00410-012-0817-6en
dc.description.obiettivoSpecifico2.3. TTC - Laboratori di chimica e fisica delle rocceen
dc.description.journalTypeJCR Journalen
dc.description.fulltextrestricteden
dc.relation.issn0010-7999en
dc.relation.eissn1432-0967en
dc.contributor.authorMollo, S.en
dc.contributor.authorPutirka, K.en
dc.contributor.authorIezzi, G.en
dc.contributor.authorScarlato, P.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.departmentUniversity of Californiaen
dc.contributor.departmentUniversità di Chietien
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptUniversità di Roma "La Sapienza"-
crisitem.author.deptUniversity of California-
crisitem.author.deptUniversità degli studi G. D'annunzio, Chieti Pescara, Italy-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.orcid0000-0003-1933-0192-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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