Rapid injection of particles and gas into non-fluidized granular material, and some volcanological implications

In diatremes and other volcanic vents, steep bodies of volcaniclastic material having differing properties (particle size distribution, proportion of lithic fragments, etc.) from those of the surrounding vent-filling volcaniclastic material are often found. It has been proposed that cylindrical or c...

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Bibliographic Details
Published in:Bulletin of volcanology 2008-10, Vol.70 (10), p.1151-1168
Main Authors: Ross, Pierre-Simon, White, James D. L., Zimanowski, Bernd, Büttner, Ralf
Format: Article
Language:English
Subjects:
Crystalline rocks
Earth and Environmental Science
Earth Sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Exact sciences and technology
Explosions
Gases
Geochemistry
Geology
Geophysics/Geodesy
Igneous and metamorphic rocks petrology, volcanic processes, magmas
Injection
Magma
Mineralogy
Multiphase flow
Natural hazards: prediction, damages, etc
Nuclear explosions
Particle physics
Particle size
Research Article
Sedimentology
Volcanic vents
Volcanoes
Volcanology
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Summary:In diatremes and other volcanic vents, steep bodies of volcaniclastic material having differing properties (particle size distribution, proportion of lithic fragments, etc.) from those of the surrounding vent-filling volcaniclastic material are often found. It has been proposed that cylindrical or cone-shaped bodies result from the passage of “debris jets” generated after phreatomagmatic explosions or other discrete subterranean bursts. To learn more about such phenomena, we model experimentally the injection of gas-particulate dispersions through other particles. Analogue materials (glass beads or sand) and a finite amount of compressed air are used in the laboratory. The gas is made available by rapidly opening a valve—therefore the injection of gas and coloured particles into a granular host is a brief (
ISSN:0258-8900
1432-0819
DOI:10.1007/s00445-008-0230-1