Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/11733
DC Field | Value | Language |
---|---|---|
dc.date.accessioned | 2018-04-20T09:45:56Z | en |
dc.date.available | 2018-04-20T09:45:56Z | en |
dc.date.issued | 2012 | en |
dc.identifier.uri | http://hdl.handle.net/2122/11733 | en |
dc.description.abstract | Lava 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 Soufriere 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.iso | English | en |
dc.relation.ispartof | Earth and Planetary Science Letters | en |
dc.relation.ispartofseries | /337-338 (2012) | en |
dc.title | Cyclic extrusion of a lava dome based on a stick-slip mechanism | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.description.pagenumber | 39-46 | en |
dc.identifier.doi | 10.1016/j.epsl.2012.05.011 | en |
dc.description.obiettivoSpecifico | 5V. Dinamica dei processi eruttivi e post-eruttivi | en |
dc.description.journalType | JCR Journal | en |
dc.contributor.author | Costa, Antonio | en |
dc.contributor.author | Wadge, G. | en |
dc.contributor.author | Melnik, O. | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OV, Napoli, Italia | 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 Bologna, Bologna, Italia | - |
crisitem.author.dept | Inst. Mechanics, Moscow State University, Moskow, Russia | - |
crisitem.author.orcid | 0000-0002-4987-6471 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
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coswad2012.pdf | 970.6 kB | Adobe PDF |
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