Extensional Flow during Gravitational Collapse: A Tool for Setting Plate Convergence (Padrón Migmatitic Dome, Variscan Belt, NW Iberia)

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dc.contributor.authorDíez Fernández, Rubén
dc.contributor.authorMartínez Catalán, José Ramón
dc.contributor.authorGómez Barreiro, Juan
dc.contributor.authorArenas Martín, Ricardo
dc.date.accessioned2023-06-20T00:20:53Z
dc.date.available2023-06-20T00:20:53Z
dc.date.issued2012
dc.description.abstractPlate convergence analysis in collisional orogens is usually based on the study of major contractional structures and strike-slip shear zones. Here we show how the structural analysis of extensional structures may report the regional or far stress field during relatively local, gravity-driven extensional collapse of a thickened continental crust and how this information may be used to constrain the broad vectors of plate convergence at that time. The Padro´n migmatitic dome is a synconvergent extensional system developed in the axial zone of the Variscan belt exposed in the NW part of the Iberian Massif of Spain. This system affected the allochthonous and autochthonous sequences involved in Pangaea’s assembly in Southern Europe. It includes three major extensional shear zones, which have been analyzed in detail to provide a wide ground data set for the discussion of the proposed model. The tectonic flow in the Padrón migmatitic dome and in other coeval structures is characterized by vectors ranging from parallel to oblique, in the latter case with a counterclockwise azimuth in relation to the trend of the orogenic belt. Our model suggests that the extensional collapse of the Variscan belt inNWIberia would have developed if the convergence between Gondwana and Laurussia had not stopped and that it would have included a dextral component.
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/17409
dc.identifier.doi10.1086/662735
dc.identifier.issn0022-1376
dc.identifier.officialurlhttp://www.press.uchicago.edu/ucp/journals/journal/jg.html
dc.identifier.urihttps://hdl.handle.net/20.500.14352/42435
dc.journal.titleThe Journal of geology
dc.language.isoeng
dc.page.final103
dc.page.initial83
dc.publisherChicago, University of Chicago Press.
dc.rights.accessRightsopen access
dc.subject.cdu552.3(460.11)
dc.subject.keywordGravitational Collapse
dc.subject.keywordVariscan Belt
dc.subject.keywordNW Iberia
dc.subject.ucmPetrología
dc.titleExtensional Flow during Gravitational Collapse: A Tool for Setting Plate Convergence (Padrón Migmatitic Dome, Variscan Belt, NW Iberia)
dc.typejournal article
dc.volume.number120
dspace.entity.typePublication
relation.isAuthorOfPublication5a03ae3f-5399-488e-b3ba-546c9011caa8
relation.isAuthorOfPublicationa1923245-aea2-4606-b726-d329291980fc
relation.isAuthorOfPublication590ee677-786b-4d34-b10b-30b65d1a8d35
relation.isAuthorOfPublication.latestForDiscovery5a03ae3f-5399-488e-b3ba-546c9011caa8
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