Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/2158
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dc.contributor.authorallPiochi, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italiaen
dc.contributor.authorallDe Vivo, B.; Dipartimento di Geofisica e Vulcanologia, Università Federico II, Napoli, Italyen
dc.contributor.authorallAyuso, R. A.; U.S. Geological Survey, MS 954 National Center, Reston, VA, USAen
dc.date.accessioned2007-06-13T08:59:38Zen
dc.date.available2007-06-13T08:59:38Zen
dc.date.issued2006en
dc.identifier.urihttp://hdl.handle.net/2122/2158en
dc.description.abstractA large database of major, trace and isotope (Sr, Nd, Pb, O) data exists for rocks produced by the volcanic activity of Somma-Vesuvius volcano. Variation diagrams strongly suggest a major role for evolutionary processes such as fractional crystallization, contamination, crystal trapping and magma mixing, occurring after magma genesis in the mantle. Most mafic magmas are enriched in LILE (K, Rb, Ba), REE (Ce, Sm) and Y, show small Nb–Ta negative anomalies, and have values of Nb/Zr at about 0.15. Enrichments in LILE, REE, Nb and Ta do not correlate with Sr isotope values or degree of both K enrichment and silica undersaturation. The results indicate mantle source heterogeneity produced by slab-derived components beneath the volcano. However, the Sr isotope values of Somma-Vesuvius increase from 0.7071 up to 0.7081 with transport through the uppermost 11–12 km of the crust. The Sr isotope variation suggests that the crustal component affected the magmas during ascent through the lithosphere to the surface. Our new geochemical assessment based on chemical, isotopic and fluid inclusion data points to the existence of three main levels of magma storage. Two of the levels are deep and may represent long-lived reservoirs, and an uppermost crustal level that probably coincides with the volcanic conduit. The deeper level of magma storage is deeper than 12 km and fed the 1944 AD eruption. The intermediate level coincides with the seismic discontinuity detected by Zollo et al. (1996) at about 8 km. This intermediate level supplies magmas with 87Sr/86Sr values between 0.7071 and 0.7074, and δO18 8‰ that typically erupted both during interplinian (i.e. 1906 AD) and sub-plinian (472 AD, 1631 AD) events. The shallowest level of magma storage at about 5 km was the site of magma chambers for the Pompei and Avellino eruptions. New investigations are necessary to verify the proposed magma feeding system.en
dc.format.extent1180996 bytesen
dc.format.mimetypeapplication/pdfen
dc.language.isoEnglishen
dc.publisher.nameElsevieren
dc.relation.ispartofVolcanism in the Campania Plain: Vesuvius, Campi Flegrei and Ignimbritesen
dc.subjectNONEen
dc.titleThe Magma feeding system of Somma-Vesuvius (Italy)strato-volcano:new inferences from a review of geochemical and Sr,Nd,Pb and O isotope data. Volcanism in the Campania Plain: Vesuvius, Campi Flegrei and Ignimbritesen
dc.typebook chapteren
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber183-204en
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.INGV05. General::05.02. Data dissemination::05.02.01. Geochemical dataen
dc.description.fulltextopenen
dc.contributor.authorPiochi, M.en
dc.contributor.authorDe Vivo, B.en
dc.contributor.authorAyuso, R. A.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italiaen
dc.contributor.departmentDipartimento di Geofisica e Vulcanologia, Università Federico II, Napoli, Italyen
dc.contributor.departmentU.S. Geological Survey, MS 954 National Center, Reston, VA, USAen
item.openairetypebook chapter-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OV, Napoli, Italia-
crisitem.author.deptDipartimento di Geofisica e Vulcanologia, University Federico II, Napoli, Italy-
crisitem.author.deptU.S. Geological Survey, MS 954 National Center, Reston, VA 20192, USA-
crisitem.author.orcid0000-0003-4214-1998-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent05. General-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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