Constraints on the frontal crustal structure of a continental collision from an integrated geophysical research: the Central-Western Betic Cordillera (SW Spain)

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dc.contributor.author Ruiz Constán, Ana
dc.contributor.author Pedrera Parias, Antonio
dc.contributor.author Galindo Zaldívar, Jesús
dc.contributor.author Pous, Jaume
dc.contributor.author Arzate Flores, Jorge
dc.contributor.author Roldán García, Francisco Javier
dc.contributor.author Marín Lechado, Carlos
dc.contributor.author Anahnah, Farida
dc.date.accessioned 2020-09-16T05:37:53Z
dc.date.available 2020-09-16T05:37:53Z
dc.date.issued 2012-08-21
dc.identifier.citation Geochemistry, Geophysics, Geosystems, vol.13, n.8, 1-19 es_ES
dc.identifier.issn 1525-2027
dc.identifier.uri http://hdl.handle.net/20.500.12468/301
dc.description.abstract Mélange rocks outcrop widely in the central and western frontal sectors of the Betic Cordillera, as in many other collisional orogens where they form part of the accretionary wedges. Extrusion of Triassic plastic clays and evaporites was favored by the progressive accretion of the Betic External Zones, mixing rocks of different provenance and forming a synorogenic frontal mélange unit. MT data coupled with gravity data are a valid combined methodology to characterize the geometry of these mélange units, since the characterization of plastic rocks geometry is usually uncertain using seismic techniques. The results correlate well with known geological features (sedimentary basins, calcareous ranges, evaporitic rocks) and reveal the deep geometry. A resistive body, slightly dipping toward the SE, points to the continuity of the Iberian Massif below the Guadalquivir basin (2 ) and the External Zones (6–8 ). To the south, gravity models show the Iberian continental crust subducting below the Internal Zones with a roughly 20–35 slope. The main conductive bodies are related to the location of evaporitic rocks involved in the frontal mélange. They overlie the Iberian Massif and, southwards, the frontal Jurassic and Cretaceous limestone sequences of the External and Median Subbetics. In this setting, thick plastic rock units placed above the foreland could act as a lubricant facilitating continental subduction, and being progressively accreted toward a frontal mélange. es_ES
dc.description.sponsorship Géosciences Montpellier, Université Montpellier, Francia es_ES
dc.description.sponsorship Géosciences Montpellier, Centre National de la Recherche Scientifique, Francia es_ES
dc.description.sponsorship Instituto Geológico y Minero de España, España es_ES
dc.description.sponsorship Instituto Andaluz de Ciencias de la Tierra, Consejo Superior de Investigaciones Científicas, España es_ES
dc.description.sponsorship Instituto Andaluz de Ciencias de la Tierra, Universidad de Granada, España es_ES
dc.description.sponsorship Departamento de Geodinámica, Universidad de Granada, España es_ES
dc.description.sponsorship Departament de Geodinàmica i Geofísica, Universitat de Barcelona, España es_ES
dc.description.sponsorship Centro de Geociencias, Universidad Nacional Autónoma de México, México es_ES
dc.language.iso en es_ES
dc.publisher American Geophysical Union, Geochemical Society es_ES
dc.relation CSD2006–00041 es_ES
dc.relation CGL-2008- 03474-E es_ES
dc.relation CGL2010–21048 es_ES
dc.relation CGL 2008 0367 E/BTE es_ES
dc.relation TOPO-IBERIA CONSOLIDER INGENIO es_ES
dc.rights Acceso abierto es_ES
dc.subject Gibraltar Arc es_ES
dc.subject broadband magnetotelluric data es_ES
dc.subject frontal mélange es_ES
dc.subject gravity data es_ES
dc.subject España es_ES
dc.title Constraints on the frontal crustal structure of a continental collision from an integrated geophysical research: the Central-Western Betic Cordillera (SW Spain) es_ES
dc.type Postprint es_ES
dc.relation.publisherversion https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2012GC004153 es_ES
dc.description.funder Ministerio de Ciencia y Educación, España es_ES
dc.description.funder Junta de Andalucía, España es_ES
dc.identifier.doi https://doi.org/10.1029/2012GC004153 es_ES
dc.coverage.spatialStudy Cordilleras Béticas, España es_ES


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