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dc.contributor.authorCrozier, Josh
Tramontano, Samantha
Forte, Pablo
Oliva, Sarah Jaye C.
Gonnermann, Helge M.
Lev, Einat
Manga, Michael
Myers, Madison
Rader, Erika
Ruprecht, Philipp
Tuffen, Hugh
Paisley, Rebecca
Houghton, Bruce F.
Shea, Thomas
Schipper, C. Ian
Castro, Jonathan M.
dc.date.accessioned 2022-09-01T14:18:18Z
dc.date.available 2022-09-01T14:18:18Z
dc.date.issued 2022
dc.identifier.citation Crozier, Josh, Tramontano, Samantha, Forte, Pablo, et al.. "Outgassing through magmatic fractures enables effusive eruption of silicic magma." Journal of Volcanology and Geothermal Research, 430, (2022) Elsevier: https://doi.org/10.1016/j.jvolgeores.2022.107617.
dc.identifier.urihttps://hdl.handle.net/1911/113157
dc.description.abstract Several 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.
dc.language.iso eng
dc.publisher Elsevier
dc.rightsThis is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/).
dc.title Outgassing through magmatic fractures enables effusive eruption of silicic magma
dc.type Journal article
dc.citation.journalTitle Journal of Volcanology and Geothermal Research
dc.citation.volumeNumber 430
dc.identifier.digital 1-s2-0-S0377027322001482-main
dc.type.dcmi Text
dc.identifier.doihttps://doi.org/10.1016/j.jvolgeores.2022.107617
dc.type.publication publisher version
dc.citation.articleNumber 107617


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