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dc.contributor.authorHolness, Marian
dc.contributor.authorStock, Michael
dc.contributor.authorGeist, Dennis
dc.date.accessioned2019-01-21T11:26:00Z
dc.date.available2019-01-21T11:26:00Z
dc.date.issued2019-02-25
dc.identifier.issn1364-503X
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/288252
dc.description.abstractThere are clear microstructural differences between mafic plutonic rocks that formed in a dynamic liquid-rich environment, in which crystals can be moved and re-arranged by magmatic currents, and those in which crystal nucleation and growth are essentially in situ and static. Crystalline enclaves, derived from deep crustal mushy zones and erupted in many volcanic settings, afford a unique opportunity to use the understanding of microstructural development, established from the study of intrusive plutons, to place constraints on the architecture of sub-volcanic systems. Here, we review the relevant microstructural literature, before applying these techniques to interrogate the crystallization environments of enclaves from the Kameni Islands of Santorini and Rábida Volcano in the Galápagos. Crystals in samples of deep-sourced material from both case studies preserve evidence of at least some time spent in a liquid-rich environment. The Kameni enclaves appear to record an early stage of crystallization during which crystals were free to move, with the bulk of crystallization occurring in a static, mushy environment. By contrast, the Rábida enclaves were sourced from an environment in which hydrodynamic sorting and re-arrangement by magmatic currents were common, consistent with a liquid-rich magma chamber. While presently active volcanoes are thought to be underlain by extensive regions rich in crystal mush, these examples preserve robust evidence for the presence of liquid-rich magma chambers in the geological record. This article is part of the Theo Murphy meeting issue 'Magma reservoir architecture and dynamics'.
dc.format.mediumPrint
dc.languageeng
dc.publisherThe Royal Society
dc.titleMagma chambers versus mush zones: constraining the architecture of sub-volcanic plumbing systems from microstructural analysis of crystalline enclaves.
dc.typeArticle
prism.issueIdentifier2139
prism.publicationDate2019
prism.publicationNamePhilos Trans A Math Phys Eng Sci
prism.startingPage20180006
prism.volume377
dc.identifier.doi10.17863/CAM.35570
dcterms.dateAccepted2018-10-16
rioxxterms.versionofrecord10.1098/rsta.2018.0006
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2019-02
dc.contributor.orcidStock, Michael [0000-0001-7208-4301]
dc.identifier.eissn1471-2962
rioxxterms.typeJournal Article/Review
pubs.funder-project-idNERC (via University of Manchester) (R118242)
pubs.funder-project-idNatural Environment Research Council (NE/N009894/1)
cam.issuedOnline2019-01-07


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