Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/3986
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dc.contributor.authorallIezzi, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.authorallMollo, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.authorallVentura, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.authorallCavallo, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.authorallRomano, C.; Univ. Roma3en
dc.date.accessioned2008-07-22T07:55:19Zen
dc.date.available2008-07-22T07:55:19Zen
dc.date.issued2008en
dc.identifier.urihttp://hdl.handle.net/2122/3986en
dc.description.abstractTwo sets of cooling experiments were run at atmospheric conditions for two anhydrous starting latitic and trachytic melts: 1) five cooling rates (25, 12.5, 3, 0.5, and 0.125 °C/min) between 1300° and 800 °C, and 2) a 11 0.5 °C/min cooling rate from 1300 °C with quench temperatures at 1200°, 1100°, 1000° and 900 °C. Trachytic run-products are invariably glassy. Nucleation is also suppressed in the latitic run-products at the three highest 13 cooling rates. Conversely, in the 0.5 and 0.125 °C/min runs, latites have a crystal content of 90 vol.%. The 14 phases are: plagioclase, clinopyroxene, glass and iron-bearing oxide (in order of abundance). The variable 15 quench temperatures, investigated by coupling experiments with Pt-wire and Pt- capsule sample containers inset 2,again did not produce crystallization of trachyte, whereas latitic samples are characterized by 10 vol.% of oxides, pyroxenes and plagioclase (in order of appearance), at temperature b1000 °C. Effects of (preferential) heterogeneous nucleation on sample holders, of superheating degree, and chemical species loss during cooling are absent for both melt compositions. The difference of solidification paths between these two silicate melts can be ascribed only to their small chemical differences. In comparison with calculated equilibrium conditions all the experimental latitic and trachytic run-products revealed strong kinetic effects, interpretable in the light of the nucleation theory. The glass- forming ability (GFA) of trachyte is higher, whereas their critical cooling rate (Rc) is lower (b0.125 °C/min), in comparison to latitic melts (RcN0.5 °C/min). The experimental results carried out in this study can be applied to lava flows and domes; trachytic lavas are able to flow for longer period with respect to latitic ones in a metastable condition. Glass-rich terrestrial lavas, i.e. obsidians, can be the result of sluggish nucleation kinetics due to the relative high polymerisation of evolved silicate melts.en
dc.language.isoEnglishen
dc.publisher.nameElsevieren
dc.relation.ispartofChemical Geologyen
dc.relation.ispartofseries3-4/253 (2008)en
dc.subjectcrystallizationen
dc.subjectlava flowsen
dc.titleExperimental solidification of anhydrous latitic and trachytic melts at different cooling rates: the role of nucleation kineticsen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber91-101en
dc.identifier.URLhttp://www.sciencedirect.com/science/journal/00092541en
dc.subject.INGV04. Solid Earth::04.08. Volcanology::04.08.02. Experimental volcanismen
dc.subject.INGV04. Solid Earth::04.08. Volcanology::04.08.03. Magmasen
dc.subject.INGV04. Solid Earth::04.08. Volcanology::04.08.05. Volcanic rocksen
dc.subject.INGV04. Solid Earth::04.08. Volcanology::04.08.07. Instruments and techniquesen
dc.subject.INGV05. General::05.02. Data dissemination::05.02.02. Seismological dataen
dc.identifier.doi10.1016/j.chemgeo.2008.04.008en
dc.description.obiettivoSpecifico2.3. TTC - Laboratori di chimica e fisica delle rocceen
dc.description.obiettivoSpecifico3.6. Fisica del vulcanismoen
dc.description.journalTypeJCR Journalen
dc.description.fulltextreserveden
dc.contributor.authorIezzi, G.en
dc.contributor.authorMollo, S.en
dc.contributor.authorVentura, G.en
dc.contributor.authorCavallo, A.en
dc.contributor.authorRomano, C.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.departmentUniv. Roma3en
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptUniversità degli studi G. D'annunzio, Chieti Pescara, Italy-
crisitem.author.deptUniversità di Roma "La Sapienza"-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.deptUniversità degli Studi di Roma Tre, Dipartimento di Scienze-
crisitem.author.orcid0000-0001-9388-9985-
crisitem.author.orcid0000-0003-1442-7729-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent05. General-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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