Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/2372| DC Field | Value | Language |
|---|---|---|
| dc.contributor.authorall | Diller, K.; School of Earth and Space Exploration, Arizona State University | en |
| dc.contributor.authorall | Clarke, A.; School of Earth and Space Exploration, Arizona State University | en |
| dc.contributor.authorall | Voight, B.; College of Earth and Mineral Sciences, Pennsylvania State University | en |
| dc.contributor.authorall | Neri, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia | en |
| dc.date.accessioned | 2007-08-24T12:22:52Z | en |
| dc.date.available | 2007-08-24T12:22:52Z | en |
| dc.date.issued | 2006 | en |
| dc.identifier.uri | http://hdl.handle.net/2122/2372 | en |
| dc.description.abstract | We explore physical mechanisms controlling formation of a confining conduit plug using 1D, steady-state numerical models of magma ascent. Model results for the welldocumented 1997 Vulcanian explosions at Soufrie`re Hills volcano were compared against subsurface conditions constrained by geophysical and petrologic analysis. We suggest that, if magma is permeable and overpressured and rock surrounding the conduit is permeable, degassing occurs both vertically and through conduit walls. This outgassing creates a region of low-vesicularity, dense magma near the surface (magma plug) which eventually seals the conduit and promotes system overpressure. Driving pressure increases with increasing magma flow rate, hindering volatile exsolution and shifting open-system degassing to shallower levels of the conduit. As a result, increasing magma flow rate for a fixed conduit width creates a vertically thinner plug and increases the magnitude and vertical extent of conduit overpressure. Plug thickness and density are also controlled by magma and edifice permeability | en |
| dc.language.iso | English | en |
| dc.publisher.name | Agu | en |
| dc.relation.ispartof | Geophys. Res. Lett. | en |
| dc.relation.ispartofseries | /33 (2006) | en |
| dc.subject | physical mechanisms | en |
| dc.subject | magma | en |
| dc.title | Mechanisms of conduit plug formation: implications for Vulcanian explosions. | en |
| dc.type | article | en |
| dc.description.status | Published | en |
| dc.type.QualityControl | Peer-reviewed | en |
| dc.description.pagenumber | L20302 | 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::04.08.03. Magmas | en |
| dc.subject.INGV | 05. General::05.05. Mathematical geophysics::05.05.99. General or miscellaneous | en |
| dc.identifier.doi | 10.1029/2006GL027391 | en |
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(2000), The relationship between degassing and ground deformation at Soufrie`re Hills Volcano, Montserrat, J. Volcanol. Geotherm. Res., 98, 117– 126. Widiwijayanti, C., A. B. Clarke, D. Elsworth, and B. Voight (2005), Geodetic Constraints on the Shallow Magma System at Soufrie`re Hills Volcano, Montserrat, Geophys. Res. Lett., 32, L11309, doi:10.1029/ 2005GL022846. Wilson, L., R. S. J. Sparks, and G. P. L. Walker (1980), Explosive volcanic eruptions: IV. The control of magma properties and conduit geometry on eruption column behavior, Geophys. J. R. Astron. Soc., 63, 117– 148. | en |
| dc.description.journalType | JCR Journal | en |
| dc.description.fulltext | reserved | en |
| dc.contributor.author | Diller, K. | en |
| dc.contributor.author | Clarke, A. | en |
| dc.contributor.author | Voight, B. | en |
| dc.contributor.author | Neri, A. | en |
| dc.contributor.department | School of Earth and Space Exploration, Arizona State University | en |
| dc.contributor.department | College of Earth and Mineral Sciences, Pennsylvania State University | 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 | School of Earth and Space Exploration, Arizona State University | - |
| crisitem.author.dept | Arizona State University, USA | - |
| crisitem.author.dept | Department of Geosciences, Penn State University, University Park, Pennsylvania, USA | - |
| crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italia | - |
| crisitem.author.orcid | 0000-0002-3536-3624 | - |
| crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| 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 | - |
| Appears in Collections: | Article published / in press | |
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