A unique blueschist facies metapelite with Mg-rich chloritoid from the Badajoz-Córdoba Unit (SW Iberian Massif): correlation of Late Devonian high-pressure belts along the Variscan Orogen

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dc.contributor.authorArenas Martín, Ricardo
dc.contributor.authorNovo Fernández, Irene
dc.contributor.authorGarcia Casco, Antonio
dc.contributor.authorDíez Fernández, Rubén
dc.contributor.authorFuenlabrada Pérez, José Manuel
dc.contributor.authorPereira, Manuel Francisco
dc.contributor.authorAbati Gómez, Jacobo
dc.contributor.authorSánchez Martínez, Sonia
dc.contributor.authorRubio Pascual, Francisco J.
dc.date.accessioned2023-06-17T08:58:55Z
dc.date.available2023-06-17T08:58:55Z
dc.date.issued2021
dc.description.abstractThe Badajoz-Córdoba Unit (BCU, SW Iberian Massif) is a Variscan high-P unit mainly constituted by metapelites, metagreywackes, orthogneisses, Grt-amphibolites, and retrogressed eclogites (high-P metamorphism at c. 377 Ma). Discovery of rare metapelites with well-preserved high-P mineral assemblages, including large garnets up to 1 cm in diameter with abundant inclusions, chloritoid (up to XMg = 0.32), kyanite, staurolite, chlorite, phengite (up to Si = 3.16 apfu), paragonite, margarite, and rutile, allows detailed determination of the tectonothermal evolution of the unit. Pseudosection modelling of representative samples indicates that this mineral assemblage formed in blueschist facies (near eclogite facies transition) at P conditions higher than 20 kbar at c. 525°C and that it underwent a subsequent severe exhumation and moderate heating. The lithological composition of the BCU, the age of high-P metamorphism and the characteristics of the high-P mineral assemblages are similar to those found in other high-P and low to intermediate-T units of the Variscan Orogen. All these units form part of a single blueschist-eclogite facies metamorphic belt formed during Late Devonian subduction of the external margin of Gondwana.
dc.description.departmentDepto. de Mineralogía y Petrología
dc.description.facultyFac. de Ciencias Geológicas
dc.description.refereedTRUE
dc.description.sponsorship(Ministerio de Economía, Industria y Competitividad
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/64018
dc.identifier.doi10.1080/00206814.2020.1789509
dc.identifier.issn0020-6814
dc.identifier.officialurlhttps://www.tandfonline.com/doi/abs/10.1080/00206814.2020.1789509
dc.identifier.urihttps://hdl.handle.net/20.500.14352/7806
dc.journal.titleInternational Geology Review
dc.language.isoeng
dc.publisherTaylor and Francis
dc.relation.projectIDCGL2016- 76438-P
dc.rights.accessRightsrestricted access
dc.subject.cdu552.43(460)
dc.subject.keywordHigh-P metapelites
dc.subject.keywordLate Devonian subduction
dc.subject.keywordblueschist-eclogite facies metamorphism
dc.subject.keywordSW Iberian Massif
dc.subject.keywordVariscan correlations
dc.subject.ucmPetrología
dc.titleA unique blueschist facies metapelite with Mg-rich chloritoid from the Badajoz-Córdoba Unit (SW Iberian Massif): correlation of Late Devonian high-pressure belts along the Variscan Orogen
dc.typejournal article
dspace.entity.typePublication
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relation.isAuthorOfPublication.latestForDiscovery590ee677-786b-4d34-b10b-30b65d1a8d35
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