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dc.contributor.authorMoussallam, Yvesen
dc.contributor.authorPeters, Nialen
dc.contributor.authorMasias, Pen
dc.contributor.authorApaza, Fen
dc.contributor.authorBarnie, Ten
dc.contributor.authorIan Schipper, Cen
dc.contributor.authorCurtis, Aen
dc.contributor.authorTamburello, Gen
dc.contributor.authorAiuppa, Aen
dc.contributor.authorBani, Pen
dc.contributor.authorGiudice, Gen
dc.contributor.authorPieri, Den
dc.contributor.authorDavies, AGen
dc.contributor.authorOppenheimer, Cliveen
dc.date.accessioned2017-06-27T17:43:42Z
dc.date.available2017-06-27T17:43:42Z
dc.date.issued2017-06-01en
dc.identifier.issn0258-8900
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/265032
dc.description.abstractThe proximity of the major city of Arequipa to El Misti has focused attention on the hazards posed by the active volcano. Since its last major eruption in the fifteenth century, El Misti has experienced a series of modest phreatic eruptions and fluctuating fumarolic activity. Here, we present the first measurements of the compositions of gas emitted from the lava dome in the summit crater. The gas composition is found to be fairly dry with a H2O/SO2 molar ratio of 32 ± 3, a CO2/SO2 molar ratio of 2.7 ± 0.2, a H2S/SO2 molar ratio of 0.23 ± 0.02 and a H2/SO2 molar ratio of 0.012 ± 0.002. This magmatic gas signature with minimal evidence of hydrothermal or wall rock interaction points to a shallow magma source that is efficiently outgassing through a permeable conduit and lava dome. Field and satellite observations show no evolution of the lava dome over the last decade, indicating sustained outgassing through an established fracture network. This stability could be disrupted if dome permeability were to be reduced by annealing or occlusion of outgassing pathways. Continued monitoring of gas composition and flux at El Misti will be essential to determine the evolution of hazard potential at this dangerous volcano.
dc.description.sponsorshipThis research was conducted as part of the ‘Trail By Fire’ expedition (PI: Y. Moussallam). The project was supported by the Royal Geographical Society (with the Institute of British Geographers) with the Land Rover Bursary; the Deep Carbon Observatory DECADE Initiative; Santander, Ocean Optics; Crowcon; Air Liquide; Thermo Fisher Scientific; Cactus Outdoor; Turbo Ace and Team Black Sheep. We thank Jean-loup Guyot, Sebastien Carretier, Rose-Marie Ojeda, Pablo Samaniego and Jean-Luc Lepennec together with IRD South-America personnel for all their logistical help. We are extremely grateful to Marco Rivera and all OVI personnel for their help and support. YM acknowledges support from the Scripps Institution of Oceanography Postdoctoral Fellowship program. A.A and G.T acknowledge the ERC grant no. 305377 (BRIDGE). CIS acknowledges a research start-up grant from Victoria University of Wellington. C.O. is supported by the NERC Centre for the Observation and Modelling of Earthquakes, Volcanoes and Tectonics. The Earth Observing-1 (EO-1) spacecraft is managed by NASA’s Goddard Space Flight Center, Greenbelt, Maryland, USA.
dc.language.isoenen
dc.publisherSpringer
dc.rightsAttribution 4.0 Internationalen
dc.rightsAttribution 4.0 Internationalen
dc.rightsAttribution 4.0 Internationalen
dc.rightsAttribution 4.0 Internationalen
dc.rightsAttribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectvolcanic hazarden
dc.subjectArequipaen
dc.subjectoutgassingen
dc.subjectASTERen
dc.subjectMulti-GASen
dc.subjectTrail by fireen
dc.titleMagmatic gas percolation through the old lava dome of El Misti volcanoen
dc.typeArticle
prism.number46en
prism.publicationDate2017en
prism.publicationNameBulletin of Volcanologyen
prism.volume79en
dc.identifier.doi10.17863/CAM.10780
dcterms.dateAccepted2017-05-16en
rioxxterms.versionofrecord10.1007/s00445-017-1129-5en
rioxxterms.versionVoRen
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/en
rioxxterms.licenseref.startdate2017-06-01en
dc.contributor.orcidMoussallam, Yves [0000-0002-4707-8943]
dc.contributor.orcidPeters, Nial [0000-0001-6817-6262]
dc.contributor.orcidOppenheimer, Clive [0000-0003-4506-7260]
dc.identifier.eissn1432-0819
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idNERC (via University of Leeds) (GA/13M/031)
pubs.funder-project-idLeverhulme Trust (RPG-2016-218)
cam.issuedOnline2017-05-24en


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Attribution 4.0 International
Except where otherwise noted, this item's licence is described as Attribution 4.0 International