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dc.contributor.authorPedrera, A.es_ES
dc.contributor.authorGarcía-Senz, J.es_ES
dc.contributor.authorAyala, C.es_ES
dc.contributor.authorRuiz-Constán, A.es_ES
dc.contributor.authorRodriguez-Fernandez, Luis Robertoes_ES
dc.contributor.authorRobador, A.es_ES
dc.contributor.authorGonzález Menéndez, L.es_ES
dc.identifier.citationTectonics, 36(12): 3155–3177 (2017)es_ES
dc.description.abstractRecent models support the view that the Pyrenees were formed after the inversion of a previously highly extended continental crust that included exhumed upper mantle rocks. Mantle rocks remain near to the surface after compression and mountain building, covered by the latest Cretaceous to Paleogene sequences. 3-D lithospheric-scale gravity inversion demands the presence of a high-density mantle body placed within the crust in order to justify the observed anomalies. Exhumed mantle, having ~50 km of maximum width, continuously extends beneath the Basque-Cantabrian Basin and along the northern side of the Pyrenees. The association of this body with rift, postrift, and inversion structural geometries is tested in a balanced cross section across the Basque-Cantabrian Basin that incorporates a major south-dipping ramp-flat-ramp extensional detachment active between Valanginian and early Cenomanian times. Results indicate that horizontal extension progressed ~48 km at variable strain rates that increased from 1 to ~4 mm/yr in middle Albian times. Low-strength Triassic Keuper evaporites and mudstones above the basement favor the decoupling of the cover with formation of minibasins, expulsion rollovers, and diapirs. The inversion of the extensional system is accommodated by doubly verging basement thrusts due to the reactivation of the former basin bounding faults in Eocene-Oligocene times. Total shortening is estimated in ~34 km and produced the partial subduction of the continental lithosphere beneath the two sides of the exhumed mantle. Obtained results help to pinpoint the original architecture of the North Iberian Margin and the evolution of the hyperextended aborted intracontinental basins. ©2017. American Geophysical Uniones_ES
dc.description.sponsorshipAgencia Estatal de Investigación (AEI). Grant Numbers: CGL2015-71692-P, CGL2016-80687-Res_ES
dc.publisherBlackwell Publishinges_ES
dc.relation.isversionofPublisher's versiones_ES
dc.subjectBasque-Cantabrian Basines_ES
dc.subjectLithospheric-scale extensional detachmentes_ES
dc.subjectOblique riftinges_ES
dc.subjectPeridotites Shalees_ES
dc.subjectSalt tectonicses_ES
dc.titleReconstruction of the Exhumed Mantle Across the North Iberian Margin by Crustal-Scale 3-D Gravity Inversion and Geological Cross Sectiones_ES
dc.description.peerreviewedPeer reviewedes_ES
dc.contributor.funderConsejo Superior de Investigaciones Científicas (España)es_ES
oprm.item.hasRevisionno ko 0 false*
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