Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/11637
DC FieldValueLanguage
dc.date.accessioned2018-04-05T08:31:29Zen
dc.date.available2018-04-05T08:31:29Zen
dc.date.issued2018en
dc.identifier.urihttp://hdl.handle.net/2122/11637en
dc.description.abstractPacaya volcano in Guatemala is one of the most active volcanoes of the Central American Volcanic Arc (CAVA). However, its magmatic gas signature and volatile output have received little attention to date. Here, we present novel volcanic gas information from in-situ (Multi-GAS) and remote (UV camera) plume observations in January 2016. We find in-plume H2O/SO2 and CO2/SO2 ratios of 2-20 and 0.6-10.5, and an end-member magmatic gas signature of 80.5 mol. % H2O, 10.4 mol. % CO2, and 9.0 mol. % SO2. The SO2 flux is evaluated at 8856550 tons/d. This, combined with co-acquired volcanic plume composition, leads to H2O and CO2 fluxes of 2,23061,390 and 7006440, and a total volatile flux of 3,800 tons/d. We use these results in tandem with previous SO2 flux budgets for Fuego and Santiaguito to estimate the total volcanic CO2 flux from Guatemala at 1,1606600 tons/day. This calculation is based upon CO2/total S (St) ratios for Fuego (1.560.75) and Santiaguito (1.460.75) inferred from a gas (CO2/St ratio) versus traceelement (Ba/La ratio) CAVA relationship. The H2O-poor and low CO2/St ratio ( 1.0-1.5) signature of Pacaya gas suggests dominant mantle-wedge derivation of the emitted volatiles. This is consistent with 3He/4He ratios in olivine hosted fluid inclusions (FIs), which range between 8.4 and 9.0 Ra (being Ra the atmospheric 3He/4He ratio) at the upper limit of MORB range (861 Ra). These values are the highest ever measured in CAVA and among the highest ever recorded in arc volcanoes worldwide, indicating negligible 4He contributions from the crust/slab.en
dc.language.isoEnglishen
dc.relation.ispartofGeochemistry, Geophysics, Geosystemsen
dc.relation.ispartofseries/19 (2018)en
dc.titleThe Magmatic Gas Signature of Pacaya Volcano, With Implications for the Volcanic CO2 Flux From Guatemalaen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber667-692en
dc.identifier.doi10.1002/2017GC007238en
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.authorBattaglia, A.en
dc.contributor.authorBitetto, M.en
dc.contributor.authorAiuppa, Alessandroen
dc.contributor.authorRizzo, Andrea Lucaen
dc.contributor.authorChigna, G.en
dc.contributor.authorWatson, I. M.en
dc.contributor.authorD'Aleo, R.en
dc.contributor.authorJuárez Cacao, F. J.en
dc.contributor.authorde Moor, M. J.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italiaen
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 Palermo, Palermo, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Milano, Milano, Italia-
crisitem.author.deptObservatorio Vulcanol ogico y Sismol ogico de Costa Rica (OVSICORI)-
crisitem.author.orcid0000-0003-0460-9772-
crisitem.author.orcid0000-0002-0254-6539-
crisitem.author.orcid0000-0003-2225-3781-
crisitem.author.orcid0000-0002-9211-6398-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.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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