Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/7577
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dc.contributor.authorallD'Oriano, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italiaen
dc.contributor.authorallCioni, R.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa, Pisa, Italia; Dip.to di Scienze della Terra, Università di Cagliari, Cagliari, Italyen
dc.contributor.authorallBertagnini, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italiaen
dc.contributor.authorallAndronico, D.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italiaen
dc.contributor.authorallCole, P. D.; Montserrat Volcano Observatory, Flemmings, Montserrat, West Indies; Seismic Research Centre, Trinidad and Tobago, West Indiesen
dc.date.accessioned2012-01-26T11:50:24Zen
dc.date.available2012-01-26T11:50:24Zen
dc.date.issued2011-08en
dc.identifier.urihttp://hdl.handle.net/2122/7577en
dc.description.abstractRecent stratigraphic studies at Vesuvius have revealed that, during the past 4,000 years, long lasting, moderate to low-intensity eruptions, associated with continuous or pulsating ash emission, have repeatedly occurred. The present work focuses on the AS1a eruption, the first of a series of ash-dominated explosive episodes which characterized the period between the two Subplinian eruptions of 472 AD and 1631 AD. The deposits of this eruption consist of an alternation of massive and thinly laminated ash layers and minor well sorted lapilli beds, reflecting the pulsatory injection into the atmosphere of variably concentrated ash-plumes alternating with Violent Strombolian stages. Despite its nearly constant chemical composition, the juvenile material shows variable external clast morphologies and groundmass textures, reflecting the fragmentation of a magma body with lateral and/or vertical gradients in both vesicularity and crystal content. Glass compositions and mineralogical assemblages indicate that the eruption was fed by rather homogeneous phonotephritic magma batches rising from a reservoir located at ~ 4 km (100 MPa) depth, with fluctuations between magma delivery and magma discharge. Using crystal size distribution (CSD) analyses of plagioclase and leucite microlites, we estimate that the transit time of the magma in the conduit was on the order of ~ 2 days, corresponding to an ascent rate of around 2 × 10−2 ms−1. Accordingly, assuming a typical conduit diameter for this type of eruption, the minimum duration of the AS1a event is between about 1.5 and 6 years. Magma fragmentation occurred in an inertially driven regime that, in a magma with low viscosity and surface tension, can act also under conditions of slow ascent.en
dc.language.isoEnglishen
dc.publisher.nameSpringer-Verlagen
dc.relation.ispartofBulletin of Volcanologyen
dc.relation.ispartofseries6/73(2011)en
dc.relation.isversionofhttp://hdl.handle.net/2122/6600en
dc.subjectAsh emission activityen
dc.subjectTephriteen
dc.subjectVesuviusen
dc.subjectStratigraphyen
dc.subjectTextural analysesen
dc.titleDynamics of ash-dominated eruptions at Vesuvius: the post-512 AD AS1a eventen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber699-715en
dc.identifier.URLhttp://www.springerlink.com/content/j16j115024w35026/en
dc.subject.INGV04. Solid Earth::04.08. Volcanology::04.08.05. Volcanic rocksen
dc.subject.INGV04. Solid Earth::04.08. Volcanology::04.08.08. Volcanic risken
dc.identifier.doi10.1007/s00445-010-0432-1en
dc.description.obiettivoSpecifico3.5. Geologia e storia dei vulcani ed evoluzione dei magmien
dc.description.journalTypeJCR Journalen
dc.description.fulltextreserveden
dc.contributor.authorD'Oriano, C.en
dc.contributor.authorCioni, R.en
dc.contributor.authorBertagnini, A.en
dc.contributor.authorAndronico, D.en
dc.contributor.authorCole, P. D.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa, Pisa, Italia; Dip.to di Scienze della Terra, Università di Cagliari, Cagliari, Italyen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italiaen
dc.contributor.departmentMontserrat Volcano Observatory, Flemmings, Montserrat, West Indies; Seismic Research Centre, Trinidad and Tobago, West Indiesen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia-
crisitem.author.deptDepartment of Geography, Environment and Disaster Management, University of Coventry, Coventry, UK-
crisitem.author.orcid0000-0003-2237-5121-
crisitem.author.orcid0000-0002-2526-9095-
crisitem.author.orcid0000-0003-4075-2242-
crisitem.author.orcid0000-0002-8333-1547-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
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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