The late Variscan HT/LP metamorphic event in NW and Central Iberia: relationships to crustal thickening, extension, orocline development and crustal evolution

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dc.contributor.authorMartínez Catalán, José R.
dc.contributor.authorRubio Pascual, Francisco J.
dc.contributor.authorDíez Montes, Alejandro
dc.contributor.authorDíez Fernández, Rubén
dc.contributor.authorGómez Barreiro, Juan
dc.contributor.authorDias Da Silva, Ícaro
dc.contributor.authorGonzález Clavijo, Emilio
dc.contributor.authorAyarza, Puy
dc.contributor.authorAlcock, James E.
dc.contributor.editorSchulmann, K.
dc.date.accessioned2024-01-09T13:12:02Z
dc.date.available2024-01-09T13:12:02Z
dc.date.issued2014-01
dc.description.abstractThe Variscan metamorphic evolution of the autochthonous domain of NW and Central Iberia is characterized by a Barrovian gradient followed by a high-temperature–low-pressure (HT/LP) event associated with voluminous granite magmatism. The structural, metamorphic and magmatic histories of the region are described briefly and the relations between them are explained. A coherent model for evolution of the continental crust is proposed using published radiometric ages, thermal models and seismic reflection profiles. The metamorphic evolution, including the high-temperature event, is explained by crustal thickening resulting from the Gondwana–Laurussia collision followed by a period of thermal relaxation and a long-lasting extensional stage. The fact that the highest temperatures were reached in the core of the Central Iberian arc, partly occupied by remnants of a huge allochthonous nappe stack, is discussed in relation to both the emplacement of the allochthon and subsequent oroclinal bending. The overburden provided by the allochthonous pile was decisive in triggering the high-temperature event. Orocline development mostly occurred later and had no significant effect on the metamorphic evolution, although it was important for the present localization of gneiss domes and granitoids. The possible role of the mantle in supplying additional heat to explain the HT/LP event is also discussed. It would seem that little mantle contribution was needed and there are no strong arguments for mantle delamination, although some kind of mantle–crust interaction is expected beneath the hot regions presently occupying the core of the Central Iberian arc.
dc.description.departmentDepto. de Mineralogía y Petrología
dc.description.facultyFac. de Ciencias Geológicas
dc.description.refereedTRUE
dc.description.statuspub
dc.identifier.doi10.1144/sp405.1
dc.identifier.essn0305-8719
dc.identifier.issn2041-4927
dc.identifier.officialurlhttps://www.lyellcollection.org/doi/abs/10.1144/SP405.1
dc.identifier.urihttps://hdl.handle.net/20.500.14352/92039
dc.journal.titleGeological Society, London, special publications
dc.language.isoeng
dc.page.final247
dc.page.initial225
dc.publisherThe Geological Society
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internationalen
dc.rights.accessRightsrestricted access
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject.cdu551.2
dc.subject.ucmCiencias
dc.subject.unesco25 Ciencias de la Tierra y del Espacio
dc.titleThe late Variscan HT/LP metamorphic event in NW and Central Iberia: relationships to crustal thickening, extension, orocline development and crustal evolution
dc.typejournal article
dc.type.hasVersionCVoR
dc.volume.number405
dspace.entity.typePublication
relation.isAuthorOfPublication5a03ae3f-5399-488e-b3ba-546c9011caa8
relation.isAuthorOfPublicationa1923245-aea2-4606-b726-d329291980fc
relation.isAuthorOfPublication.latestForDiscovery5a03ae3f-5399-488e-b3ba-546c9011caa8
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