Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/16892
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dc.contributor.authorMerino, Enriquecat
dc.contributor.authorCanals i Sabaté, Àngelscat
dc.contributor.authorFletcher, R. C.cat
dc.date.accessioned2011-03-08T09:35:19Z-
dc.date.available2011-03-08T09:35:19Z-
dc.date.issued2006-
dc.identifier.issn1695-6133-
dc.identifier.urihttp://hdl.handle.net/2445/16892-
dc.description.abstractThe dolomite veins making up rhythmites common in burial dolomites are not cement infillings of supposed cavities, as in the prevailing view, but are instead displacive veins, veins that pushed aside the host dolostone as they grew. Evidence that the veins are displacive includes a) small transform-fault-like displacements that could not have taken place if the veins were passive cements, and b) stylolites in host rock that formed as the veins grew in order to compensate for the volume added by the veins. Each zebra vein consists of crystals that grow inward from both sides, and displaces its walls via the local induced stress generated by the crystal growth itself. The petrographic criterion used in recent literature to interpret zebra veins in dolomites as cements - namely, that euhedral crystals can grow only in a prior void - disregards evidence to the contrary. The idea that flat voids did form in dolostones is incompatible with the observed optical continuity between the saddle dolomite euhedra of a vein and the replacive dolomite crystals of the host. The induced stress is also the key to the self-organization of zebra veins: In a set of many incipient, randomly-spaced, parallel veins just starting to grow in a host dolostone, each vein¿s induced stress prevents too-close neighbor veins from nucleating, or redissolves them by pressure-solution. The veins that survive this triage are those just outside their neighbors¿s induced stress haloes, now forming a set of equidistant veins, as observed.eng
dc.format.extent11 p.-
dc.format.mimetypeapplication/pdf-
dc.language.isoengeng
dc.publisherUniversitat de Barcelona (UB). Institut de Ciències de la Terra Jaume Almera (ICTJA). Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDEA). Universitat Autonònoma de Barcelona (UAB). Consejo Superior de Investigaciones Científicas (CSIC)cat
dc.relation.isformatofReproducció del document publicat a http://www.geologica-acta.com/pdf/vol0403a05.pdfcat
dc.relation.ispartofGeologica Acta, 2006, vol. 4, núm. 3, p. 383-393-
dc.rightscc by-sa (c) Merino et al., 2006-
dc.rights.urihttp://creativecommons.org/licenses/by-sa/3.0/es/*
dc.sourceArticles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)-
dc.subject.classificationDiagènesicat
dc.subject.classificationGeoquímicacat
dc.subject.otherDiagenesiseng
dc.subject.otherGeochemistryeng
dc.titleGenesis of self-organized zebra textures in burial dolomites: Displacive veins, induced stress, and dolomitizationeng
dc.typeinfo:eu-repo/semantics/article-
dc.typeinfo:eu-repo/semantics/publishedVersion-
dc.identifier.idgrec531132-
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess-
Appears in Collections:Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)

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