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dc.contributor.authorBercovici, Daviden
dc.contributor.authorRudge, Johnen
dc.date.accessioned2015-11-02T10:54:21Z
dc.date.available2015-11-02T10:54:21Z
dc.date.issued2015-11-07en
dc.identifier.citationEarth and Planetary Science Letters 2015, 433: 139-145. doi:10.1016/j.epsl.2015.10.051en
dc.identifier.issn0012-821X
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/252485
dc.description.abstractThe deformation of partially molten mantle in tectonic environments can lead to exotic structures, which potentially affect both melt and plate-boundary focussing. Examples of such structures are found in laboratory deformation experiments on partially molten rocks. Simple-shear and torsion experiments demonstrate the formation of concentrated melt bands at angles of around 20° to the shear plane. The melt bands form in the experiments with widths between a few to tens of microns, and a band spacing roughly an order of magnitude larger. Existing compaction theories, however, cannot predict this band width structure, let alone any mode selection, since they infer the fastest growing instability to occur for wavelengths or bands of vanishing width. Here, we propose that surface tension in the mixture, especially on a diffuse interface in the limit of sharp melt-fraction gradients, can mitigate the instability at vanishing wavelength and thus permit mode selection for finite-width bands. Indeed, the expected weak capillary forces on the diffuse interface lead to predicted mode selection at the melt-band widths observed in the experiments.
dc.description.sponsorshipThe authors sincerely thank Sam Butler and Ben Holtzman for thoughtful reviews. Support was provided by the National Science Foundation (NSF, grant EAR-1344538), the Natural Environment Research Council (NERC, grant NE/I023929/1) and Trinity College.
dc.languageEnglishen
dc.language.isoenen
dc.publisherElsevier
dc.rightsCreative Commons Attribution 4.0 International License
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectMagma transporten
dc.subjectmantle dynamicsen
dc.subjectrock deformationen
dc.titleA mechanism for mode selection in melt band instabilitiesen
dc.typeArticle
dc.description.versionThis is the final version of the article. It first appeared from Elsevier via http://dx.doi.org/10.1016/j.epsl.2015.10.051en
prism.endingPage145
prism.publicationDate2015en
prism.publicationNameEarth and Planetary Science Lettersen
prism.startingPage139
prism.volume433en
dc.rioxxterms.funderNSF
dc.rioxxterms.funderNERC
dc.rioxxterms.projectidEAR-1344538
dc.rioxxterms.projectidNE/I023929/1
dcterms.dateAccepted2015-10-29en
rioxxterms.versionofrecord10.1016/j.epsl.2015.10.051en
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2015-11-07en
dc.contributor.orcidRudge, John [0000-0002-9399-7166]
dc.identifier.eissn1385-013X
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idNERC (NE/I023929/1)


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Creative Commons Attribution 4.0 International License
Except where otherwise noted, this item's licence is described as Creative Commons Attribution 4.0 International License