Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/9618
DC Field | Value | Language |
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dc.contributor.authorall | Del Bello, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.contributor.authorall | Lane, S. J.; Lancaster University (UK) | en |
dc.contributor.authorall | James, M.; Lancaster University (UK) | en |
dc.contributor.authorall | Llewellin, E. W.; University of Durham (UK) | en |
dc.contributor.authorall | Taddeucci, J.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.contributor.authorall | Scarlato, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.contributor.authorall | Capponi, A.; Lancaster University (UK) | en |
dc.date.accessioned | 2015-05-27T12:39:52Z | en |
dc.date.available | 2015-05-27T12:39:52Z | en |
dc.date.issued | 2015-08-01 | en |
dc.identifier.uri | http://hdl.handle.net/2122/9618 | en |
dc.description.abstract | Strombolian activity is common in low-viscosity volcanism. It is characterised by quasi-periodic, short-lived explosions, which, whilst typically weak, may vary greatly in magnitude. The current paradigm for a strombolian volcanic eruption postulates a large gas bubble (slug) bursting explosively after ascending a conduit filled with low-viscosity magma. However, recent studies of pyroclast textures suggest the formation of a region of cooler, degassed, more-viscous magma at the top of the conduit is a common feature of strombolian eruptions. Following the hypothesis that such a rheological impedance could act as a ‘viscous plug’, which modifies and complicates gas escape processes, we conduct the first experimental investigation of this scenario. We find that: 1) the presence of a viscous plug enhances slug burst vigour; 2) experiments that include a viscous plug reproduce, and offer an explanation for, key phenomena observed in natural strombolian eruptions; 3) the presence and extent of the plug must be considered for the interpretation of infrasonic measurements of strombolian eruptions. Our scaled analogue experiments show that, as the gas slug expands on ascent, it forces the underlying low-viscosity liquid into the plug, creating a low-viscosity channel within a high-viscosity annulus. The slug's diameter and ascent rate change as it enters the channel, generating instabilities and increasing slug overpressure. When the slug reaches the surface, a more energetic burst process is observed than would be the case for a slug rising through the low-viscosity liquid alone. Fluid-dynamic instabilities cause low and high viscosity magma analogues to intermingle, and cause the burst to become pulsatory. The observed phenomena are reproduced by numerical fluid dynamic simulations at the volcanic scale, and provide a plausible explanation for pulsations, and the ejection of mingled pyroclasts, observed at Stromboli and elsewhere. | en |
dc.description.sponsorship | European Union’s Seventh Framework Programme (FP7/2007–2013) project NEMOH, REA grant agreement No. 289976 | en |
dc.language.iso | English | en |
dc.publisher.name | Elsevier Science Limited | en |
dc.relation.ispartof | Earth and planetary science letters | en |
dc.relation.ispartofseries | /423 (2015) | en |
dc.subject | analogue modeling | en |
dc.subject | strombolian explosions | en |
dc.subject | plugged vents | en |
dc.subject | volcano acoustic | en |
dc.subject | volcano infrasonic | en |
dc.subject | slug bursting | en |
dc.subject | Taylor bubble | en |
dc.title | Viscous plugging can enhance and modulate explosivity of strombolian eruptions | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.description.pagenumber | 210-218 | en |
dc.identifier.URL | http://www.sciencedirect.com/science/article/pii/S0012821X15002836 | en |
dc.identifier.URL | https://www.researchgate.net/publication/276902298_Viscous_plugging_can_enhance_and_modulate_explosivity_of_strombolian_eruptions | en |
dc.subject.INGV | 04. Solid Earth::04.03. Geodesy::04.03.06. Measurements and monitoring | en |
dc.subject.INGV | 04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology | en |
dc.subject.INGV | 04. Solid Earth::04.08. Volcanology::04.08.99. General or miscellaneous | en |
dc.subject.INGV | 04. Solid Earth::04.08. Volcanology::04.08.02. Experimental volcanism | en |
dc.subject.INGV | 04. Solid Earth::04.08. Volcanology::04.08.03. Magmas | en |
dc.subject.INGV | 04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring | en |
dc.subject.INGV | 05. General::05.02. Data dissemination::05.02.03. Volcanic eruptions | en |
dc.identifier.doi | 10.1016/j.epsl.2015.04.034 | en |
dc.description.obiettivoSpecifico | 2V. Dinamiche di unrest e scenari pre-eruttivi | en |
dc.description.obiettivoSpecifico | 3V. Dinamiche e scenari eruttivi | en |
dc.description.journalType | JCR Journal | en |
dc.description.fulltext | restricted | en |
dc.relation.issn | 0012-821X | en |
dc.relation.eissn | 1385-013X | en |
dc.contributor.author | Del Bello, E. | en |
dc.contributor.author | Lane, S. J. | en |
dc.contributor.author | James, M. | en |
dc.contributor.author | Llewellin, E. W. | en |
dc.contributor.author | Taddeucci, J. | en |
dc.contributor.author | Scarlato, P. | en |
dc.contributor.author | Capponi, A. | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.contributor.department | Lancaster University (UK) | en |
dc.contributor.department | Lancaster University (UK) | en |
dc.contributor.department | University of Durham (UK) | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.contributor.department | Lancaster University (UK) | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | restricted | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
crisitem.author.dept | Lancaster University (UK) | - |
crisitem.author.dept | Environmental Science Department, Institute of Environmental and Natural Sciences, Lancaster University, Lancaster, United Kingdom | - |
crisitem.author.dept | University of Durham (UK) | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
crisitem.author.orcid | 0000-0001-8043-7410 | - |
crisitem.author.orcid | 0000-0002-0516-3699 | - |
crisitem.author.orcid | 0000-0003-1933-0192 | - |
crisitem.author.orcid | 0000-0003-3008-122X | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.classification.parent | 05. General | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | Existing users please Login |
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DelBelloetal_2015_b_1-s2.0-S0012821X15002836-main.pdf | Main article | 1.37 MB | Adobe PDF | |
EPSL-D-15-00041R1_r.pdf | Open Access | 810.53 kB | Adobe PDF | View/Open |
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