Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/11733
DC FieldValueLanguage
dc.date.accessioned2018-04-20T09:45:56Zen
dc.date.available2018-04-20T09:45:56Zen
dc.date.issued2012en
dc.identifier.urihttp://hdl.handle.net/2122/11733en
dc.description.abstractLava dome eruptions are sometimes characterised by large periodic fluctuations in extrusion rate over periods of hours that may be accompanied by Vulcanian explosions and pyroclastic flows. We consider a simple system of nonlinear equations describing a 1D flow of lava extrusion through a deep elastic dyke feeding a shallower cylindrical conduit in order to simulate this short-period cyclicity. Stick-slip conditions depending on a critical shear stress are assumed at the wall boundary of the cylindrical conduit. By analogy with the behaviour of industrial polymers in a plastic extruder, the elastic dyke acts like a barrel and the shallower cylindrical portion of the conduit as a die for the flow of magma acting as a polymer. When we applied the model to the Soufrie􏰀re Hills Volcano, Montserrat, for which the key parameters have been evaluated from previous studies, cyclic extrusions with periods from 3 to 30 h were readily simulated, matching observations. The model also reproduces the reduced period of cycles observed when a major unloading event occurs due to lava dome collapse.en
dc.language.isoEnglishen
dc.relation.ispartofEarth and Planetary Science Lettersen
dc.relation.ispartofseries/337-338 (2012)en
dc.titleCyclic extrusion of a lava dome based on a stick-slip mechanismen
dc.typearticleen
dc.description.statusPublisheden
dc.description.pagenumber39-46en
dc.identifier.doi10.1016/j.epsl.2012.05.011en
dc.description.obiettivoSpecifico5V. Dinamica dei processi eruttivi e post-eruttivien
dc.description.journalTypeJCR Journalen
dc.contributor.authorCosta, Antonioen
dc.contributor.authorWadge, G.en
dc.contributor.authorMelnik, O.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OV, Napoli, Italiaen
item.cerifentitytypePublications-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.openairetypearticle-
item.grantfulltextrestricted-
item.fulltextWith Fulltext-
item.languageiso639-1en-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia-
crisitem.author.deptInst. Mechanics, Moscow State University, Moskow, Russia-
crisitem.author.orcid0000-0002-4987-6471-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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