Magnetobiochronology of Lower Pliocene marine sediments from the lower Guadalquivir Basin: Insights into the tectonic evolution of the Strait of Gibraltar area

Show simple item record Pérez Asensio, José N. Larrasoaña Gorosquieta, Juan Cruz Samankassou, Elias Sierro, Francisco J. García-Castellanos, Daniel Jimenez Moreno, Gonzalo Salazar Rincón, Ángel Enrique Salvany, Josep-Maria Ledesma, Santiago Mata Campo, Maria Pilar Civis Llovera, Jorge Mediavilla Laso, Carlos 2019-08-06T11:20:19Z 2019-08-06T11:20:19Z 2018-11-01
dc.identifier.citation GSA Bulletin, vol.130, n.11-12, p.1791-1808. es_ES
dc.identifier.issn 0016-7606
dc.description.abstract The Gibraltar Arc is a complex tectonic region, and several competing models have been proposed to explain its evolution. We studied the sedimentary fill of the Guadalquivir Basin to identify tectonic processes that were occurring when the reopening of the Strait of Gibraltar led to the reestablishment of Mediterranean outflow. We present a chronostratigraphic framework for the Lower Pliocene sediments from the lower Guadalquivir Basin (SW Spain). The updated chronology is based on magnetobiostratigraphic data from several boreholes. Our results show that the studied interval in the La Matilla core is in the early Pliocene section, providing better constraints on the sedimentary evolution of the basin during that period. Migrating depositional facies led to a younger onset of sandy deposition basinward. At the northwestern passive margin, a 0.7 m.y. period of sedimentary bypass related to a sharp decrease in sedimentation rates and lower sea levels resulted from the tectonic uplift of the forebulge. In contrast, high sedimentation rates with continuous deep-marine sedimentation are recorded at the basin center due to continuous tectonic subsidence and west-southwestward progradation of axial depositional systems. The marginal forebulge uplift, continuous tectonic basinal subsidence, and southward progradation of clinoforms in the early Pliocene can be explained by the pull of a lithospheric slab beneath the Gibraltar Arc as the Strait of Gibraltar opened. These findings are, to our knowledge, the first reported sedimentary expression of slab pull beneath the Betics related to the opening of the Strait of Gibraltar after the Messinian salinity crisis. es_ES
dc.description.sponsorship Department of Earth Sciences, University of Geneva, Suiza es_ES
dc.description.sponsorship GRC Geociències Marines, Departament de Dinàmica de la Terra i de l’Oceà, Universitat de Barcelona, España es_ES
dc.description.sponsorship Instituto Geológico y Minero de España, España es_ES
dc.description.sponsorship Institut de Ciències de la Terra Jaume Almera, España es_ES
dc.description.sponsorship Departamento de Geología, Universidad de Salamanca, españa es_ES
dc.description.sponsorship Departamento de Estratigrafía y Paleontología, Universidad de Granada, España es_ES
dc.description.sponsorship Departament d’Enginyeria Civil i Ambiental, Universitat Politècnica de Catalunya, España es_ES
dc.description.sponsorship Gas Natural Fenosa, España es_ES
dc.language.iso en es_ES
dc.publisher Geological Society of America es_ES
dc.relation Research Project CGL2012-30875 (GUADALTYC) es_ES
dc.rights Acceso abierto es_ES
dc.subject biocronología es_ES
dc.subject Plioceno inferior es_ES
dc.subject sedimentación marina es_ES
dc.subject Cuenca Guadalquivir es_ES
dc.subject Tectónica es_ES
dc.subject Estrecho Gibraltar es_ES
dc.subject litoestratigrafía es_ES
dc.subject foraminifera es_ES
dc.title Magnetobiochronology of Lower Pliocene marine sediments from the lower Guadalquivir Basin: Insights into the tectonic evolution of the Strait of Gibraltar area es_ES
dc.type Postprint es_ES
dc.relation.publisherversion es_ES
dc.description.funder Ministerio de Economía y Competitividad, España es_ES
dc.description.funder Junta de Andalucía, España es_ES
dc.description.funder Generalitat de Catalunya, España es_ES
dc.identifier.doi es_ES
dc.coverage.spatialStudy Cuenca del Guadalquivir, Estrecho de Gibraltar, España es_ES

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