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dc.contributor.authorRocco, Stefano
dc.contributor.authorWoods, Andrew W
dc.contributor.authorHarrington, Jon
dc.contributor.authorNorris, Simon
dc.date.accessioned2018-03-22T18:13:44Z
dc.date.available2018-03-22T18:13:44Z
dc.date.issued2017-01-28
dc.identifier.issn0094-8276
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/274258
dc.description.abstractWe present new experiments that identify a mechanism for episodic release of gas from a pressurized, deformable reservoir confined by a clay seal, as a result of the transition from bulk deformation to channel growth through the clay. Air is injected into the center of a thin cylindrical cell initially filled with a mixture of bentonite clay and water. For sufficiently dry mixtures, the pressure initially increases with little volume change. On reaching the yield stress of the clay‐water mixture, the lid of the cell then deforms elastically and an air‐filled void forms in the center of the cell as the clay is driven radially outward. With continued supply of air, the pressure continues to increase until reaching the fracture strength of the clay. A fracture‐like channel then forms and migrates to the outer edge of the cell, enabling the air to escape. The pressure then falls, and the clay flows back toward the center of the cell and seals the channel so the cycle can repeat. The phenomena may be relevant at mud volcanoes.
dc.publisherWiley
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectfracturing
dc.subjectclay seal
dc.subjectepisodic
dc.subjectpressurization
dc.titleAn experimental model of episodic gas release through fracture of fluid confined within a pressurized elastic reservoir
dc.typeArticle
prism.endingPage759
prism.issueIdentifier2
prism.publicationDate2017
prism.publicationNameGeophysical Research Letters
prism.startingPage751
prism.volume44
dc.identifier.doi10.17863/CAM.21381
dcterms.dateAccepted2016-12-23
rioxxterms.versionofrecord10.1002/2016GL071546
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
rioxxterms.licenseref.startdate2017-01-28
dc.identifier.eissn1944-8007
rioxxterms.typeJournal Article/Review
cam.issuedOnline2016-12-29


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Attribution-NonCommercial-NoDerivatives 4.0 International
Except where otherwise noted, this item's licence is described as Attribution-NonCommercial-NoDerivatives 4.0 International