Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/2972
DC Field | Value | Language |
---|---|---|
dc.contributor.authorall | Caricchi, L.; Department of Earth Sciences, ETH Zurich | en |
dc.contributor.authorall | Burlini, L.; Department of Earth Sciences, ETH Zurich | en |
dc.contributor.authorall | Ulmer, P.; Department of Earth Sciences, ETH Zurich | en |
dc.contributor.authorall | Gerya, T.; Department of Earth Sciences, ETH Zurich | en |
dc.contributor.authorall | Vassalli, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia | en |
dc.contributor.authorall | Papale, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia | en |
dc.date.accessioned | 2007-12-06T08:48:03Z | en |
dc.date.available | 2007-12-06T08:48:03Z | en |
dc.date.issued | 2007 | en |
dc.identifier.uri | http://hdl.handle.net/2122/2972 | en |
dc.description.abstract | The eruptive dynamics of volcanic systems are largely controlled by the viscosity of deforming magma. Here we report the results of a series of high-temperature, high-pressure experiments at conditions relevant for volcanic conduits (250 MPa confining pressure and temperature between 500 °C and 900 °C) that were undertaken to investigate the rheology of magma with crystal fractions varying between 0.5 and 0.8 (50 to 80 wt.%) at different strain-rate conditions. The experiments demonstrate that the presence of crystals increases the relative viscosity (ratio between the viscosity of the mixture and the viscosity of the melt phase) of magmas and additionally induces a decrease of the relative viscosity with increasing strain-rate (shear thinning, non-Newtonian behavior). The experimental results, combined with existing data at low crystal fractions (0–0.3), were used to develop a semi-empirical parameterization that describes the variations of relative viscosity for crystal fractions between 0 and 0.8 and accounts for the complex non-Newtonian rheology of crystal-bearing magmas. The new parameterization, included into numerical models simulating the magma ascent dynamics, reveals that strain-rate-dependent rheology significantly modifies the dynamic behavior inside volcanic conduits, particularly affecting the magma fragmentation conditions. | en |
dc.language.iso | English | en |
dc.publisher.name | Elsevier | en |
dc.relation.ispartof | Earth and Planetary Science Letters | en |
dc.relation.ispartofseries | / 264(2007) | en |
dc.subject | magma rheology | en |
dc.subject | experimental deformation | en |
dc.title | Non-Newtonian rheology of crystal-bearing magmas and implications for magma ascent dynamics | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | 402-419 | en |
dc.subject.INGV | 04. Solid Earth::04.08. Volcanology::04.08.03. Magmas | en |
dc.identifier.doi | 10.1036/j.epsl2007.09.032 | en |
dc.description.obiettivoSpecifico | 3.6. Fisica del vulcanismo | en |
dc.description.journalType | JCR Journal | en |
dc.description.fulltext | partially_open | en |
dc.contributor.author | Caricchi, L. | en |
dc.contributor.author | Burlini, L. | en |
dc.contributor.author | Ulmer, P. | en |
dc.contributor.author | Gerya, T. | en |
dc.contributor.author | Vassalli, M. | en |
dc.contributor.author | Papale, P. | en |
dc.contributor.department | Department of Earth Sciences, ETH Zurich | en |
dc.contributor.department | Department of Earth Sciences, ETH Zurich | en |
dc.contributor.department | Department of Earth Sciences, ETH Zurich | en |
dc.contributor.department | Department of Earth Sciences, ETH Zurich | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, 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 | ETH, Zurich, Switzerland | - |
crisitem.author.dept | Department of Earth Sciences, ETH Zurich | - |
crisitem.author.dept | Department of Earth Sciences, ETH Zurich | - |
crisitem.author.dept | School of Geological Sciences, University College Dublin, Belfield, Dublin 4, Ireland | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italia | - |
crisitem.author.orcid | 0000-0001-9051-2621 | - |
crisitem.author.orcid | 0000-0002-5207-2124 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 04. Solid Earth | - |
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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EPSL_Caricchi_et al_2007.pdf | main article | 2.18 MB | Adobe PDF | |
EPSL_PP_Caricchi_et al_2007.pdf | Pre-print | 963.18 kB | Adobe PDF | View/Open |
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