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dc.contributor.author
Schipper, C. Ian
dc.contributor.author
Castro, Jonathan M.
dc.contributor.author
Kennedy, Ben M.
dc.contributor.author
Tuffen, Hugh
dc.contributor.author
Whattam, Jack
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Wadsworth, Fabian B.
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Paisley, Rebecca
dc.contributor.author
Fitzgerald, Rebecca H.
dc.contributor.author
Rhodes, Emma
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Schaefer, Lauren N.
dc.contributor.author
Ashwell, Paul A.
dc.contributor.author
Forte, Pablo Brian
dc.contributor.author
Seropian, Gilles
dc.contributor.author
Alloway, Brent V.
dc.date.available
2021-07-08T19:01:52Z
dc.date.issued
2021-01
dc.identifier.citation
Schipper, C. Ian; Castro, Jonathan M.; Kennedy, Ben M.; Tuffen, Hugh; Whattam, Jack; et al.; Silicic conduits as supersized tuffisites: Clastogenic influences on shifting eruption styles at Cordón Caulle volcano (Chile); Springer; Bulletin Of Volcanology; 83; 2; 1-2021; 1-22
dc.identifier.issn
0258-8900
dc.identifier.uri
http://hdl.handle.net/11336/135756
dc.description.abstract
Understanding the processes that drive explosive-effusive transitions during large silicic eruptions is crucial to hazard mitigation. Conduit models usually treat magma ascent and degassing as a gradual, unidirectional progression from bubble nucleation through magmatic fragmentation. However, there is growing evidence for the importance of bi-directional clastogenic processes that sinter fragmented materials into coherent clastogenic magmas. Bombs that were ejected immediately before the first emergence of lava in the 2011?2012 eruption at Cordón Caulle volcano (Chile) are texturally heterogeneous composite assemblages of welded pyroclastic material. Although diverse in density and appearance, SEM and X-ray tomographic analysis show them all to have been formed by multi-generational viscous sintering of fine ash. Sintering created discrete clasts ranging from obsidian to pumice and formed a pervasive clast-supporting matrix that assembled these clasts into a conduit-sealing plug. An evaluation of sintering timescales reveals texturally disparate bomb components to represent only minutes of difference in residence time within the conduit. Permeability modelling indicates that the plug was an effective conduit seal, with outgassing potential?even from high-porosity regions?being limited by the inability of gas to flow across tendrils of densely sintered inter-clast matrix. Contrary to traditional perspectives, declining expressions of explosivity at the surface need not be preceded or accompanied by a decline in fragmentation efficiency. Instead, they result from tips in balance between the opposing processes of fragmentation and sintering that occur in countless cycles within volcanic conduits. These processes may be particularly enhanced at silicic fissure volcanoes, which have laterally extensive subsurface plumbing systems that require complex magma ascent pathways. The textures investigated here reveal the processes occurring within silicic fissures to be phenomenologically identical to those that have been inferred to occur in tuffisite veins: silicic conduits are essentially supersized examples of edifice-penetrating tuffisites.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Cordón Caulle
dc.subject
Rhyolite
dc.subject
Sintering
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Explosive-effusive transitions
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Vulcanología
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Silicic conduits as supersized tuffisites: Clastogenic influences on shifting eruption styles at Cordón Caulle volcano (Chile)
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-06-28T19:03:01Z
dc.journal.volume
83
dc.journal.number
2
dc.journal.pagination
1-22
dc.journal.pais
Alemania
dc.journal.ciudad
Berlin
dc.description.fil
Fil: Schipper, C. Ian. Victoria University Of Wellington; Nueva Zelanda
dc.description.fil
Fil: Castro, Jonathan M.. Johannes Gutenberg Universitat Mainz; Alemania
dc.description.fil
Fil: Kennedy, Ben M.. University of Canterbury; Nueva Zelanda
dc.description.fil
Fil: Tuffen, Hugh. Lancaster University; Reino Unido
dc.description.fil
Fil: Whattam, Jack. Victoria University Of Wellington; Nueva Zelanda
dc.description.fil
Fil: Wadsworth, Fabian B.. University of Durham; Reino Unido
dc.description.fil
Fil: Paisley, Rebecca. McGill University; Canadá
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Fil: Fitzgerald, Rebecca H.. University of Canterbury; Nueva Zelanda
dc.description.fil
Fil: Rhodes, Emma. Uppsala Universitet.; Suecia. University of Canterbury; Nueva Zelanda
dc.description.fil
Fil: Schaefer, Lauren N.. United States Geological Survey; Estados Unidos. University of Canterbury; Nueva Zelanda
dc.description.fil
Fil: Ashwell, Paul A.. University of Canterbury; Nueva Zelanda. University of Toronto; Canadá
dc.description.fil
Fil: Forte, Pablo Brian. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina. Johannes Gutenberg Universitat Mainz; Alemania
dc.description.fil
Fil: Seropian, Gilles. University of Canterbury; Nueva Zelanda
dc.description.fil
Fil: Alloway, Brent V.. Universidad de Chile.; Chile. University of Auckland; Nueva Zelanda
dc.journal.title
Bulletin Of Volcanology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/10.1007/s00445-020-01432-1
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007%2Fs00445-020-01432-1
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