Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/7891
DC Field | Value | Language |
---|---|---|
dc.contributor.authorall | Cagnoli, B.; University of California - Berkeley | en |
dc.contributor.authorall | Manga, M.; University of California - Berkeley | en |
dc.date.accessioned | 2012-03-16T10:52:48Z | en |
dc.date.available | 2012-03-16T10:52:48Z | en |
dc.date.issued | 2005 | en |
dc.identifier.uri | http://hdl.handle.net/2122/7891 | en |
dc.description.abstract | Non-fluidised, dry granular mass flows are obtained with rock fragments located on a rough rotating disk. In these flows that develop a quasi-rigid upper layer and a basal layer of colliding particles, dense clasts sink whereas light ones rise when surrounded by particles with intermediate density. Our experiments demonstrate that the presence of a quasi-rigid upper layer in granular mass flows does not prevent vertical segregation and that the formation of coarse-tail grading in pyroclastic flows does not require fluidising gases. High-speed videos reveal that vertical segregation in granular mass flow of rock fragments is generated by inertia differences between segregating clasts and matrix when they are both pushed upward by collisions with the basal layer. Coarse-tail grading occurs because the average segregation velocity of smaller clasts is smaller than that of larger clasts. | en |
dc.language.iso | English | en |
dc.publisher.name | American Geophysical Union | en |
dc.relation.ispartof | Geophysical Research Letters | en |
dc.relation.ispartofseries | /32 (2005) | en |
dc.subject | pyroclastic flows | en |
dc.subject | vertical segregation | en |
dc.title | Vertical segregation in granular mass flows: A shear cell study | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | L10402 | en |
dc.subject.INGV | 04. Solid Earth::04.08. Volcanology::04.08.02. Experimental volcanism | en |
dc.identifier.doi | 10.1029/2005GL023165 | en |
dc.description.obiettivoSpecifico | 3.6. Fisica del vulcanismo | en |
dc.description.journalType | JCR Journal | en |
dc.description.fulltext | reserved | en |
dc.relation.issn | 0094-8276 | en |
dc.relation.eissn | 1944-8007 | en |
dc.contributor.author | Cagnoli, B. | en |
dc.contributor.author | Manga, M. | en |
dc.contributor.department | University of California - Berkeley | en |
dc.contributor.department | University of California - Berkeley | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | reserved | - |
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 | University of California - Berkeley | - |
crisitem.author.orcid | 0000-0003-3263-5345 | - |
crisitem.author.orcid | 0000-0003-3286-4682 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 04. Solid Earth | - |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | Existing users please Login |
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Cagnoli Manga 2005.pdf | 225.91 kB | Adobe PDF |
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