Outgassing through magmatic fractures enables effusive eruption of silicic magma

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dc.citation.articleNumber107617en_US
dc.citation.journalTitleJournal of Volcanology and Geothermal Researchen_US
dc.citation.volumeNumber430en_US
dc.contributor.authorCrozier, Joshen_US
dc.contributor.authorTramontano, Samanthaen_US
dc.contributor.authorForte, Pabloen_US
dc.contributor.authorOliva, Sarah Jaye C.en_US
dc.contributor.authorGonnermann, Helge M.en_US
dc.contributor.authorLev, Einaten_US
dc.contributor.authorManga, Michaelen_US
dc.contributor.authorMyers, Madisonen_US
dc.contributor.authorRader, Erikaen_US
dc.contributor.authorRuprecht, Philippen_US
dc.contributor.authorTuffen, Hughen_US
dc.contributor.authorPaisley, Rebeccaen_US
dc.contributor.authorHoughton, Bruce F.en_US
dc.contributor.authorShea, Thomasen_US
dc.contributor.authorSchipper, C. Ianen_US
dc.contributor.authorCastro, Jonathan M.en_US
dc.date.accessioned2022-09-01T14:18:18Zen_US
dc.date.available2022-09-01T14:18:18Zen_US
dc.date.issued2022en_US
dc.description.abstractSeveral mechanisms have been proposed to allow highly viscous silicic magma to outgas efficiently enough to erupt effusively. There is increasing evidence that challenges the classic foam-collapse model in which gas escapes through permeable bubble networks, and instead suggests that magmatic fracturing and/or accompanying localized fragmentation and welding within the conduit play an important role in outgassing. The 2011–2012 eruption at Cordón Caulle volcano, Chile, provides direct observations of the role of magmatic fractures. This eruption exhibited a months-long hybrid phase, in which rhyolitic lava extrusion was accompanied by vigorous gas-and-tephra venting through fractures in the lava dome surface. Some of these fractures were preserved as tuffisites (tephra-filled veins) in erupted lava and bombs. We integrate constraints from petrologic analyses of erupted products and video analyses of gas-and-tephra venting to construct a model for magma ascent in a conduit. The one-dimensional, two-phase, steady-state model considers outgassing through deforming permeable bubble networks, magmatic fractures, and adjacent wall rock. Simulations for a range of plausible magma ascent conditions indicate that the eruption of low-porosity lava observed at Cordón Caulle volcano occurs because of significant gas flux through fracture networks in the upper conduit. This modeling emphasizes the important role that outgassing through magmatic fractures plays in sustaining effusive or hybrid eruptions of silicic magma and in facilitating explosive-effusive transitions.en_US
dc.identifier.citationCrozier, Josh, Tramontano, Samantha, Forte, Pablo, et al.. "Outgassing through magmatic fractures enables effusive eruption of silicic magma." <i>Journal of Volcanology and Geothermal Research,</i> 430, (2022) Elsevier: https://doi.org/10.1016/j.jvolgeores.2022.107617.en_US
dc.identifier.digital1-s2-0-S0377027322001482-mainen_US
dc.identifier.doihttps://doi.org/10.1016/j.jvolgeores.2022.107617en_US
dc.identifier.urihttps://hdl.handle.net/1911/113157en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.rightsThis is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).en_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/).en_US
dc.titleOutgassing through magmatic fractures enables effusive eruption of silicic magmaen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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