Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/11894
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dc.date.accessioned2018-05-09T06:55:49Zen
dc.date.available2018-05-09T06:55:49Zen
dc.date.issued2017en
dc.identifier.urihttp://hdl.handle.net/2122/11894en
dc.description.abstractBasaltic magma chambers are often characterized by emptying and refilling cycles that influence their evolution in space and time, and the associated eruptive activity. During April 2007, the largest historical eruption of Piton de la Fournaise (Île de La Réunion, France) drained the shallow plumbing system () and resulted in collapse of the 1-km-wide summit crater. Following these major events, Piton de la Fournaise entered a seven-year long period of near-continuous deflation interrupted, in June 2014, by a new phase of significant inflation. By integrating multiple datasets (lava discharge rates, deformation, seismicity, gas flux, gas composition, and lava chemistry), we here show that the progressive migration of magma from a deeper (below sea level) storage zone gradually rejuvenated and pressurized the above-sea-level portion of the magmatic system consisting of a vertically-zoned network of relatively small-volume magma pockets. Continuous inflation provoked four small () eruptions from vents located close to the summit cone and culminated, during August–October 2015, with a chemically zoned eruption that erupted of lava. This two-month-long eruption evolved through (i) an initial phase of waning discharge, associated to the withdrawal of differentiated magma from the shallow system, into (ii) a month-long phase of increasing lava and SO2 fluxes at the effusive vent, coupled with CO2 enrichment of summit fumaroles, and involving emission of less differentiated lavas, to end with, (iii) three short-lived (∼2 day-long) pulses in lava and gas flux, coupled with arrival of cumulative olivine at the surface and deflation. The activity observed at Piton de la Fournaise in 2014 and 2015 points to a new model of shallow system rejuvenation and discharge, whereby continuous magma supply causes eruptions from increasingly deeper and larger magma storage zones. Downward depressurization continues until unloading of the deepest, least differentiated magma triggers pulses in lava and gas flux, accompanied by rapid contraction of the volcano edifice, that empties the main shallow reservoir and terminates the cycle. Such an unloading process may characterize the evolution of shallow magmatic systems at other persistently active effusive centers.en
dc.language.isoEnglishen
dc.relation.ispartofEarth and Planetary Science Lettersen
dc.relation.ispartofseries/463 (2017)en
dc.titleShallow system rejuvenation and magma discharge trends at Piton de la Fournaise volcano (La Réunion Island)en
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber13-24en
dc.identifier.doi10.1016/j.epsl.2017.01.024en
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dc.description.obiettivoSpecifico2V. Struttura e sistema di alimentazione dei vulcanien
dc.description.obiettivoSpecifico3V. Proprietà dei magmi e dei prodotti vulcanicien
dc.description.journalTypeJCR Journalen
dc.contributor.authorCoppola, D.en
dc.contributor.authorDi Muro, A.en
dc.contributor.authorPeltier, A.en
dc.contributor.authorVilleneuve, N.en
dc.contributor.authorFerrazzini, V.en
dc.contributor.authorFavalli, Massimilianoen
dc.contributor.authorBachèlery, P.en
dc.contributor.authorGurioli, L.en
dc.contributor.authorHarris, A. J. L.en
dc.contributor.authorMoune, S.en
dc.contributor.authorVlastélic, I.en
dc.contributor.authorGalle, B.en
dc.contributor.authorArellano, S.en
dc.contributor.authorAiuppa, Alessandroen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italiaen
item.fulltextWith Fulltext-
item.grantfulltextrestricted-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.openairetypearticle-
crisitem.author.deptDipartimento di Scienze della Terra, Università di Torino, Via Valperga Caluso, 35–10125 Torino, Italy-
crisitem.author.deptDipartimento di Scienze della Terra, Pisa, Italy-
crisitem.author.deptInstituto Geografico Nacional, Madrid, Spain-
crisitem.author.deptInstitut de Recherche pour le Développement, US 140 ESPACE, La Réunion, France-
crisitem.author.deptObservatoire Volcanologique du Piton de la Fournaise, Institut de Physique du Globe de Paris, La Réunion, France-
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.deptDepartment of Earth and Space Sciences, Chalmers University of Technology, Göteborg, Sweden-
crisitem.author.deptDepartment of Earth and Space Sciences, Chalmers University of Technology, Göteborg, Sweden-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia-
crisitem.author.orcid0000-0002-7338-6069-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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