A rootless suture and the loss of the roots of a mountain chain: The Variscan belt of NW Iberia

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dc.contributor.authorMartínez Catalán, José R.
dc.contributor.authorArenas Martín, Ricardo
dc.contributor.authorAbati Gómez, Jacobo
dc.contributor.authorSánchez Martínez, Sonia
dc.contributor.authorDíaz García, Florentino
dc.contributor.authorFernández Suárez, Javier
dc.contributor.authorGonzález Cuadra, Pablo
dc.contributor.authorCastiñeiras García, Pedro
dc.contributor.authorGómez Barreiro, Juan
dc.contributor.authorDíez Montes, Alejandro
dc.contributor.authorGonzález Clavijo, Emilio
dc.contributor.authorRubio Pascual, Francisco J.
dc.contributor.authorAndonaegui Moreno, María Del Pilar
dc.contributor.authorJeffries, Teresa E.
dc.contributor.authorAlcock, James E.
dc.contributor.authorDíez Fernández, Rubén
dc.contributor.authorLópez Carmona, Alicia
dc.date.accessioned2023-06-20T09:30:54Z
dc.date.available2023-06-20T09:30:54Z
dc.date.issued2009
dc.description.abstractOphiolites of different Paleozoic ages occur in North-West (NW) Iberia in a rootless suture representing the remnants of the Rheic Ocean. Associated allochthonous terranes in the hanging- and foot-walls of the suture derive from the former margins, whereas the relative autochthon corresponds to the Paleozoic passive margin of northern Gondwana. The Paleozoic tectonic evolution of this part of the circum-Atlantic region is deduced from the stratigraphical, petrological, structural and metamorphic evolution of the different units and their ages. The tectonic reconstruction covers from Cambro-Ordovician continental rifting and the opening of the Rheic Ocean to its Middle to Upper Devonian closure. Then, the Variscan Laurussia–Gondwana convergence and collision is briefly described, from its onset to the late stages of collapse associated with the demise of the orogenic roots. [RÉSUMÉ] Une suture sans racines et la perte des racines d’une chaîne montagneuse : la chaîne varisque du Nord-Ouest de l’Ibérie. Des ophiolites d’âges différents affleurent dans le Nord-Ouest de l’Ibérie dans une suture sans racines, témoin de l’océan Rhéïque. Les terrains allochtones sur et sous la suture dérivent de ses deux marges, tandis que l’autochtone relatif appartient à la marge passive du Nord de Gondwana. On peut déduire l’évolution des plaques dans cette partie de la région circum-Atlantique à partir des données stratigraphiques, pétrologiques, structurales, métamorphiques et géochronologiques. Cette évolution inclut le développement d’un rift continental et l’ouverture de l’océan Rhéïque pendant le Cambro-Ordovicien ainsi que sa fermeture au Dévonien moyen à supérieur. On décrit aussi l’évolution de la convergence et collision varisque entre Laurussia et Gondwana, du début jusqu’aux derniers stades d’un effondrement associé à la perte des racines orogéniques.
dc.description.departmentDepto. de Mineralogía y Petrología
dc.description.facultyFac. de Ciencias Geológicas
dc.description.refereedTRUE
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/14030
dc.identifier.doi10.1016/j.crte.2008.11.004
dc.identifier.issn1631-0713
dc.identifier.officialurlhttp://france.elsevier.com/direct/CRAS2A/
dc.identifier.urihttps://hdl.handle.net/20.500.14352/49779
dc.journal.titleComptes rendus. Géoscience
dc.language.isoeng
dc.page.final126
dc.page.initial114
dc.publisherElsevier Masson, France
dc.rights.accessRightsopen access
dc.subject.cdu552.3
dc.subject.keywordSuture océanique
dc.subject.keywordOcéan Rhéïque
dc.subject.keywordÉvolution varisque
dc.subject.keywordNord-Ouest de l’Ibérie
dc.subject.keywordOceanic suture
dc.subject.keywordRheic Ocean
dc.subject.keywordVariscan evolution
dc.subject.keywordNW Iberia
dc.subject.ucmPetrología
dc.subject.ucmGeodinámica
dc.subject.unesco2507 Geofísica
dc.titleA rootless suture and the loss of the roots of a mountain chain: The Variscan belt of NW Iberia
dc.typejournal article
dc.volume.number341
dspace.entity.typePublication
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