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dc.contributor.authorPereira Gómez, Doloreses_ES
dc.contributor.authorRodríguez Alonso, María Doloreses_ES
dc.date.accessioned2009-02-16es_ES
dc.date.accessioned2009-10-07T11:41:52Z
dc.date.available2009-10-07T11:41:52Z
dc.date.issued2000es_ES
dc.identifier.citationPereira Gómez, M. D., Rodríguez Alonso, M. D. (2000). Duality of cordierite granites related to melt-restite segregation in the Peña Negra anatectic complex, central Spain. "The Canadian Mineralogist", 38, 1329-1346.es_ES
dc.identifier.urihttp://hdl.handle.net/10366/19422es_ES
dc.identifier.urihttp://hdl.handle.net/10366/19422
dc.descriptionEstudio petrológico del Complejo anatéctico de Peña Negra (Sierra de Gredos, España)es_ES
dc.description.abstractA large anatectic complex of Hercynian age, the Peña Negra complex, crops out in the central-north area of the Sierra de Gredos, Avila batholith, central Spain. Migmatites and anatectic granitic rocks were generated during the Upper Carboniferous from a Neoproterozoic Lower Cambrian schist greywacke complex with minor interlayered orthogneisses. Granitic rocksappear as subhorizontal sheets of megacrystic granodiorite and as lenticular bodies of leucogranite. These formed by in situ anatexis and correspond to melt restite segregations under two different conditions, namely high melt-fraction in the case of the granodiorite, and low melt-fraction in the case of the leucogranites. The leucogranites display large enclaves of sillimanite-rich material, representing the restitic fraction. Granodiorite was generated as consequence of crustal thickening under conditions ofT ? 750 to 800°C and P ? 4 kbar, coinciding with the second phase of the Hercynian orogeny. After this event, an extensional episode involved smaller degrees of decompression-induced melting, and generated small batches of cordierite leucogranites from an already depleted source. Anatexis was enhanced, in both cases, by shear structures and by the existence of a fertile protolith.es_ES
dc.format.extent18 p.es_ES
dc.format.mimetypeapplication/pdfes_ES
dc.languageIngléses_ES
dc.language.isoenges_ES
dc.publisherMineralogical Association of Canada (Toronto, Canadá)es_ES
dc.relation.requiresAdobe Acrobates_ES
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Unported
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/3.0/
dc.subjectOrogenia hercinianaes_ES
dc.subjectPeña Negraes_ES
dc.subjectSierra de Gredoses_ES
dc.subjectEspañaes_ES
dc.subjectMigmatitases_ES
dc.subjectAnatexiaes_ES
dc.subjectPetrologíaes_ES
dc.subjectCordieritaes_ES
dc.subjectHercynian orogenyes_ES
dc.subjectPeña Negra Complexes_ES
dc.subjectSchist Greywacke Complexes_ES
dc.subjectMigmatiteses_ES
dc.subjectAnatexises_ES
dc.subjectCordieritees_ES
dc.subjectSpaines_ES
dc.subjectPetrologyes_ES
dc.titleDuality of cordierite granites related to melt-restite segregation in the Peña Negra Anatectic Complex, Central Spaines_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses_ES


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