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Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/5988
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dc.contributor.authorallEdmonds, M.; COMET, National Centre for Earth Observation, Earth Sciences Department, University of Cambridge, Cambridge CB2 3EQ, UKen
dc.contributor.authorallAiuppa, A.; Dipartimento CFTA, Università di Palermo, Via archirafi 36, I-90123 Palermo, Italyen
dc.contributor.authorallHumphreys, M.; Earth Sciences Department, University of Cambridge, Cambridge CB2 3EQ, UKen
dc.contributor.authorallMoretti, R.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italiaen
dc.contributor.authorallGiudice, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italiaen
dc.contributor.authorallMartin, R. S.; Earth Sciences Department, University of Cambridge, Cambridge CB2 3EQ, UKen
dc.contributor.authorallHerd, R. A.; School of Environmental Sciences, University of East Anglia, Norwich, NR4 7TJ, UKen
dc.contributor.authorallChristopher, T.; Montserrat Volcano Observatory, Montserrat, West Indiesen
dc.date.accessioned2010-04-28T10:07:31Zen
dc.date.available2010-04-28T10:07:31Zen
dc.date.issued2010-04-24en
dc.identifier.urihttp://hdl.handle.net/2122/5988en
dc.description.abstractWe present the results of a study of volcanic gases at Soufrière Hills Volcano, Montserrat, which includes the first spectroscopic measurements of the major gas species CO2 and H2S at this volcano using a Multisensor Gas Analyzer System (MultiGAS) sensor. The fluxes of CO2 and H2S were 640–2750 t/d and 84–266 t/d, respectively, during July 2008, during a prolonged eruptive pause. The flux of CO2 is similar to estimates for the entire arc from previous geochemical studies, while the measured H2S flux significantly alters our interpretation of the sulphur budget for this volcano. The fluxes of both sulphur and carbon show considerable excesses over that which can be supplied by degassing of erupted magma. We demonstrate, using thermodynamic models and published constraints on preeruptive volatile concentrations, that the gas composition and fluxes are best modeled by mixing between (1) gases derived from isobaric quenching of mafic magma against cooler andesite magma at depth and (2) gases derived from shallower rhyolitic interstitial melt within the porpyritic andesite. The escape of deep‐derived gases requires pervasive permeability or vapor advection extending to several kilometers depth in the conduit and magma storage system. These results provide more compelling evidence for both the contribution of unerupted mafic magma to the volatile budget of this andesitic arc volcano and the importance of the intruding mafic magma in sustaining the eruption. From a broader perspective, this study illustrates the importance and role of underplating mafic magmas in arc settings. These magmas play an important role in triggering and sustaining eruptions and contribute in a highly significant way to the volatile budget of arc volcanoes.en
dc.language.isoEnglishen
dc.publisher.nameAGUen
dc.relation.ispartofG-Cubeden
dc.relation.ispartofseries4/11(2010)en
dc.subjectmagma degassingen
dc.subjectthermodynamicsen
dc.subjectvolcanic gasesen
dc.subjectSoufriere Hillsen
dc.titleExcess volatiles supplied by mingling of mafic magma at an andesite arc volcanoen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumberQ04005en
dc.identifier.URLhttp://www.agu.org/pubs/crossref/2010/2009GC002781.shtmlen
dc.subject.INGV04. Solid Earth::04.08. Volcanology::04.08.01. Gasesen
dc.subject.INGV04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoringen
dc.identifier.doi10.1029/2009GC002781en
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dc.description.obiettivoSpecifico1.2. TTC - Sorveglianza geochimica delle aree vulcaniche attiveen
dc.description.journalTypeJCR Journalen
dc.description.fulltextrestricteden
dc.contributor.authorEdmonds, M.en
dc.contributor.authorAiuppa, A.en
dc.contributor.authorHumphreys, M.en
dc.contributor.authorMoretti, R.en
dc.contributor.authorGiudice, G.en
dc.contributor.authorMartin, R. S.en
dc.contributor.authorHerd, R. A.en
dc.contributor.authorChristopher, T.en
dc.contributor.departmentCOMET, National Centre for Earth Observation, Earth Sciences Department, University of Cambridge, Cambridge CB2 3EQ, UKen
dc.contributor.departmentDipartimento CFTA, Università di Palermo, Via archirafi 36, I-90123 Palermo, Italyen
dc.contributor.departmentEarth Sciences Department, University of Cambridge, Cambridge CB2 3EQ, UKen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italiaen
dc.contributor.departmentEarth Sciences Department, University of Cambridge, Cambridge CB2 3EQ, UKen
dc.contributor.departmentSchool of Environmental Sciences, University of East Anglia, Norwich, NR4 7TJ, UKen
dc.contributor.departmentMontserrat Volcano Observatory, Montserrat, West Indiesen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
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item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptMontserrat Volcano Observatory, Montserrat, West Indies-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia-
crisitem.author.deptEarth Sciences Department, University of Cambridge, Cambridge CB2 3EQ, UK-
crisitem.author.deptCentro Interdipartimentale di Ricerche in Ingegneria Ambientale, Seconda Università di Napoli, Naples, Italy.-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia-
crisitem.author.deptDepartment of Earth Sciences, University of Cambridge, UK.-
crisitem.author.deptSchool of Environmental Sciences, University of East Anglia, Norwich, NR4 7TJ, UK-
crisitem.author.deptMontserrat Volcano Observatory, Montserrat, West Indies-
crisitem.author.orcid0000-0003-1243-137X-
crisitem.author.orcid0000-0002-0254-6539-
crisitem.author.orcid0000-0003-2031-5192-
crisitem.author.orcid0000-0002-9410-4139-
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-
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