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Eruption versus intrusion? : arrest of propagation of constant volume, buoyant, liquid-filled cracks in an elastic, brittle host.

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Eruption versus intrusion? : arrest of propagation of constant volume, buoyant, liquid-filled cracks in an elastic, brittle host.

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dc.contributor.author Taisne, B.
dc.contributor.author Tait, S.
dc.date.accessioned 2012-08-21T01:25:50Z
dc.date.available 2012-08-21T01:25:50Z
dc.date.copyright 2009
dc.date.issued 2012-08-21
dc.identifier.citation Taisne, B., & Tait, S. (2009). Eruption versus intrusion? Arrest of propagation of constant volume, buoyant, liquid-filled cracks in an elastic, brittle host. Journal of Geophysical Research, 114.
dc.identifier.uri http://hdl.handle.net/10220/8401
dc.description.abstract When a volume of magma is released from a source at depth, one key question is whether or not this will culminate in an eruption or in the emplacement of a shallow intrusion. We address some of the physics behind this question by describing and interpreting laboratory experiments on the propagation of cracks filled with fixed volumes of buoyant liquid in a brittle, elastic host. Experiments were isothermal, and the liquid was incompressible. The cracks propagated vertically because of liquid buoyancy but were then found to come to a halt at a configuration of static mechanical equilibrium, a result that is inconsistent with the prediction of the theory of linear elastic fracture mechanics in two dimensions. We interpret this result as due to a three-dimensional effect. At the curved crack front, horizontal cracking is necessary in order for vertical propagation to take place. As the crack elongates and thins, the former becomes progressively harder and, in the end, impossible to fracture. We present a scaling law for the final length and breadth of cracks as a function of a governing dimensionless parameter, constructed from the liquid volume, the buoyancy, and host fracture toughness. An important implication of this result is that a minimum volume of magma is required for a volcanic eruption to occur for a given depth of magma reservoir.
dc.language.iso en
dc.relation.ispartofseries Journal of geophysical research
dc.rights © 2009 American Geophysical Union. This paper was published in Journal of Geophysical Research and is made available as an electronic reprint (preprint) with permission of American Geophysical Union. The paper can be found at DOI: [http://dx.doi.org/10.1029/2009JB006297].  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
dc.subject DRNTU::Science::Physics::Geophysics and geomagnetism.
dc.title Eruption versus intrusion? : arrest of propagation of constant volume, buoyant, liquid-filled cracks in an elastic, brittle host.
dc.type Journal Article
dc.identifier.doi http://dx.doi.org/10.1029/2009JB006297
dc.description.version Published version

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