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dc.contributor.authorDingwell, Donald Brucees_ES
dc.contributor.authorLavallée, Yanes_ES
dc.contributor.authorHess, Kai Uwees_ES
dc.contributor.authorFlaws, Asheres_ES
dc.contributor.authorMartí Molist, Joanes_ES
dc.contributor.authorNichols, Alexander R. L.es_ES
dc.contributor.authorGilg, H. Albertes_ES
dc.contributor.authorSchillinger, Burkhardes_ES
dc.date.accessioned2016-10-20T12:22:58Z-
dc.date.available2016-10-20T12:22:58Z-
dc.date.issued2016-09-
dc.identifier.citationSolid Earth, 7(5): 1383-1393 (2016)es_ES
dc.identifier.issn1869-9510-
dc.identifier.urihttp://hdl.handle.net/10261/138287-
dc.description.abstractUnderstanding the physicochemical conditions extant and mechanisms operative during explosive volcanism is essential for reliable forecasting and mitigation of volcanic events. Rhyolitic pumices reflect highly vesiculated magma whose bubbles can serve as a strain indicator for inferring the state of stress operative immediately prior to eruptive fragmentation. Obtaining the full kinematic picture reflected in bubble population geometry has been extremely difficult, involving dissection of a small number of delicate samples. The advent of reliable high-resolution tomography has changed this situation radically. Here we demonstrate via the use of tomography how a statistically powerful picture of the shapes and connectivity of thousands of individual bubbles within a single sample of tube pumice emerges. The strain record of tube pumice is modelled using empirical models of bubble geometry and liquid rheology, reliant on a constraint of magmatic water concentration. FTIR analysis reveals an imbalance in water speciation, suggesting post-eruption hydration, further supported by hydrogen and oxygen isotope measurements. Our work demonstrates that the strain recorded in the tube pumice dominated by simple shear (not pure shear) in the late deformational history of vesicular magma before eruption. This constraint in turn implies that magma ascent is conditioned by a velocity gradient (across the conduit) at the point of origin of tube pumice. Magma ascent accompanied by simple shear should enhance high eruption rates inferred independently for these highly viscous systems. © Author(s) 2016.es_ES
dc.description.sponsorshipFinancial support was provided by the Deutsche Forschungsgemeinschaft (DFG) – International Continental Drilling Program (ICDP) grant HE 4565-2-1 as well as the DFG grants LA 2651-1-1 and LA 2651 3-1. Yan Lavallée acknowledges support from the European Research Council (ERC) for the Starting Grant on Strain Localisation in Magmas (SLiM, no. 306488). Donald B. Dingwell acknowledges a Research Professorship in Experimental Volcanology of the Bundesexzellenzinitiative (LMUexcellent) as well as an ERC Advanced Grant on Explosive Volcanism in the Earth System (EVOKES, no. 247076).es_ES
dc.language.isoenges_ES
dc.publisherEuropean Geosciences Uniones_ES
dc.relation.isversionofPublisher's versiones_ES
dc.rightsopenAccesses_ES
dc.subjectTomographyes_ES
dc.subjectBubble Geometryes_ES
dc.subjectEmpirical modeles_ES
dc.subjectExplosive volcanismes_ES
dc.subjectHigh-resolution tomographyes_ES
dc.subjectPhysicochemical conditionses_ES
dc.subjectStrain indicatorses_ES
dc.subjectVelocity gradientses_ES
dc.subjectViscous systemses_ES
dc.subjectTubes (components)es_ES
dc.titleEruptive shearing of tube pumice: Pure and simplees_ES
dc.typeartículoes_ES
dc.identifier.doi10.5194/se-7-1383-2016-
dc.description.peerreviewedPeer reviewedes_ES
dc.relation.publisherversionhttp://dx.doi.org/10.5194/se-7-1383-2016es_ES
dc.identifier.e-issn1869-9529-
dc.rights.licensehttps://creativecommons.org/licenses/by/3.0/es_ES
dc.contributor.funderGerman Research Foundationes_ES
dc.contributor.funderEuropean Research Counciles_ES
dc.relation.csices_ES
oprm.item.hasRevisionno ko 0 false*
dc.identifier.funderhttp://dx.doi.org/10.13039/501100001659es_ES
dc.identifier.funderhttp://dx.doi.org/10.13039/501100000781es_ES
dc.type.coarhttp://purl.org/coar/resource_type/c_6501es_ES
item.openairetypeartículo-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
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