Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/9252
DC Field | Value | Language |
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dc.contributor.authorall | Di Genova, D.; Università Roma Tre | en |
dc.contributor.authorall | Romano, C.; Università Roma Tre | en |
dc.contributor.authorall | Alletti, M.; Institute de Science de la Terre Orleans | en |
dc.contributor.authorall | Misiti, V.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.contributor.authorall | Scarlato, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.date.accessioned | 2015-01-15T09:38:04Z | en |
dc.date.available | 2015-01-15T09:38:04Z | en |
dc.date.issued | 2014 | en |
dc.identifier.uri | http://hdl.handle.net/2122/9252 | en |
dc.description.abstract | Viscosity (η), glass transition (Tg) and heat capacity (Cp) of Etna trachybasalt and Fondo Riccio latite (Phlegrean Fields, Italy)were determined at lowand high temperatures for dry, hydrous and CO2 bearing samples.High temperature experiments have been performed in the range of 1499 to 1700 K by concentric cylindermeasurements, while low temperature experiments were carried out in the interval between 633 and 1093 K using the micropenetration technique. Glass transition temperature and glassy and liquid heat capacitieswere investigated using differential scanning calorimetry (DSC) up to 955 K. The H2O content in themelts ranged from nominally dry to 6.32 wt.%, while CO2 ranged from 229 to 1907 ppm. We combined low- and high-temperature viscosities and parameterized them by the use of a modified Vogel– Fulcher–Tamman equation,which accommodates the non-Arrhenian temperature dependence ofmelt viscosity. Experimental measurements showthat melt viscosity decreaseswith increasing temperature and water and CO2 contents. For latitic samples at 893 K, the introduction of CO2 (up to 732 ppm) decreases the liquid viscosity up to one order of magnitude with respect to the measured viscosity for H2O-bearing liquid. Moreover, the results of calorimetric measurements indicate that the glass transition temperature decreaseswith increasing volatile content (H2O+CO2). The glass transition temperature decreases by about 25 K by adding up to 1907 ppmof CO2 in the trachybasaltic samples. No appreciable effect on glassy [Cpg (Tg)] and liquid (Cpliq) heat capacities was observed with the addition of water and CO2. Structural and volcanological implications (i.e. volatile speciation and melt fragility) for water and CO2 dissolution in silicate melts are discussed in light of the presented results. | en |
dc.language.iso | English | en |
dc.publisher.name | Elsevier Science Limited | en |
dc.relation.ispartof | Chemical geology | en |
dc.relation.ispartofseries | /377 (2014) | en |
dc.subject | Viscosity | en |
dc.subject | glass transition | en |
dc.subject | Etna | en |
dc.subject | Phlegrean Fields | en |
dc.subject | volatiles | en |
dc.title | The effect of CO2 and H2O on Etna and Fondo Riccio (Phlegrean Fields) liquid viscosity, glass transition temperature and heat capacity | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | 72-86 | en |
dc.subject.INGV | 04. Solid Earth::04.08. Volcanology::04.08.02. Experimental volcanism | en |
dc.identifier.doi | 10.1016/j.chemgeo.2014.04.001 | en |
dc.description.obiettivoSpecifico | 3V. Dinamiche e scenari eruttivi | en |
dc.description.journalType | JCR Journal | en |
dc.description.fulltext | reserved | en |
dc.relation.issn | 0009-2541 | en |
dc.relation.eissn | 1872-6836 | en |
dc.contributor.author | Di Genova, D. | en |
dc.contributor.author | Romano, C. | en |
dc.contributor.author | Alletti, M. | en |
dc.contributor.author | Misiti, V. | en |
dc.contributor.author | Scarlato, P. | en |
dc.contributor.department | Università Roma Tre | en |
dc.contributor.department | Università Roma Tre | en |
dc.contributor.department | Institute de Science de la Terre Orleans | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | reserved | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | School of Earth Sciences, University of Bristol, Wills Memorial Building, Queens Road, BS8 1RJ Bristol, UK | - |
crisitem.author.dept | Università degli Studi di Roma Tre, Dipartimento di Scienze | - |
crisitem.author.dept | Università di Palermo | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
crisitem.author.orcid | 0000-0002-7370-6739 | - |
crisitem.author.orcid | 0000-0003-1442-7729 | - |
crisitem.author.orcid | 0000-0002-6151-7789 | - |
crisitem.author.orcid | 0000-0003-1933-0192 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
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DiGenovaetal_CG_2014.pdf | main article | 1.24 MB | Adobe PDF |
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