Tracking the Late Devonian high-P metamorphic belt in the Variscan Orogen: New constraints on the PT evolution of eclogites from the Cubito-Moura Unit (SW Iberian Massif)

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dc.contributor.authorNovo Fernández, Irene
dc.contributor.authorArenas Martín, Ricardo
dc.contributor.authorCapitani, Christian de
dc.contributor.authorPereira, M. Francisco
dc.contributor.authorDíez Fernández, Rubén
dc.contributor.authorSánchez Martínez, Sonia
dc.contributor.authorGarcia Casco, Antonio
dc.date.accessioned2023-06-17T08:59:55Z
dc.date.available2023-06-17T08:59:55Z
dc.date.issued2021-04
dc.description.abstractThe Cubito-Moura Unit is a high-P metamorphic succession that occurs in the southern part of the Ossa-Morena Complex (SW Iberian Massif). It includes a series of metasedimentary, metafelsic and metamafic rocks affected by a high-P, low to intermediate-T metamorphic event during Late Devonian times. Geochemistry of the metabasic rocks reveals that the generation of the protoliths occurred in a supra-subduction zone setting during Late Ediacaran to Early Ordovician times, either in a back-arc or fore-arc context. The eclogites contain atoll-like garnets, omphacite, amphibole, phengite (up to Si = 3.38 apfu), paragonite, rutile and quartz. Thermodynamic modelling in the MnNCKFMASTH system indicates a high-P metamorphic event at ~24 kbar and ~ 585 °C followed by a thermal peak at ~19 kbar and ~ 630 °C, and a subsequent exhumation to ~15 kbar. This P-T path indicates deep subduction at c. 370 Ma of this arc-related section. The lithostratigraphy and tectonothermal evolution of the Cubito-Moura Unit are equivalent to that of a number of units along the Iberian, Armorican and Bohemian massifs that can be correlated as a part of the same Basal Allochthonous Terrane. These units define a single Late Devonian high-P, low- to intermediate-T metamorphic belt developed during the first stages of the Variscan Orogeny.
dc.description.departmentDepto. de Mineralogía y Petrología
dc.description.facultyFac. de Ciencias Geológicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Economía, Industria y Competitividad (MINECO)
dc.description.sponsorshipMinisterio de Ciencia e Innovación (MICINN)
dc.description.sponsorshipFCT (Portugal)
dc.description.sponsorshipIUGS-UNESCO
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/64283
dc.identifier.doidoi.org/10.1016/j.lithos.2021.106015
dc.identifier.issn0024-4937
dc.identifier.officialurlhttps://doi.org/10.1016/j.lithos.2021.106015
dc.identifier.urihttps://hdl.handle.net/20.500.14352/7871
dc.issue.number106015
dc.journal.titleLithos (Oslo. Print)
dc.language.isoeng
dc.publisherElsevier
dc.relation.projectIDCGL2016-76438-P
dc.relation.projectIDFPU16/05281
dc.relation.projectIDUIDB/04683/2020- ICT
dc.relation.projectIDIGCP 683
dc.rights.accessRightsrestricted access
dc.subject.cdu552.16(46)
dc.subject.keywordEclogites
dc.subject.keywordThermodynamic modelling
dc.subject.keywordSW Iberian Massif
dc.subject.keywordVariscan Orogen
dc.subject.keywordVariscan correlations
dc.subject.ucmGeodinámica
dc.subject.ucmPetrología
dc.subject.unesco2507 Geofísica
dc.titleTracking the Late Devonian high-P metamorphic belt in the Variscan Orogen: New constraints on the PT evolution of eclogites from the Cubito-Moura Unit (SW Iberian Massif)
dc.typejournal article
dc.volume.number386–87
dspace.entity.typePublication
relation.isAuthorOfPublication79797d12-67a8-43ca-9e04-618eb776999b
relation.isAuthorOfPublication590ee677-786b-4d34-b10b-30b65d1a8d35
relation.isAuthorOfPublication5a03ae3f-5399-488e-b3ba-546c9011caa8
relation.isAuthorOfPublication23c93f55-b253-4f57-9df0-b6f3c6bc61c3
relation.isAuthorOfPublication.latestForDiscovery79797d12-67a8-43ca-9e04-618eb776999b
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