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<title lang=en>Is there an active subduction beneath the Gibraltar orogenic arc? Constraints from Pliocene to present-day stress field</title>
<creator>Pedrera, A.</creator>
<creator>RUIZ-CONSTAN, Ana</creator>
<creator>Galindo-Zaldivar, J.</creator>
<creator>Chalouan, A.</creator>
<creator>De Galdeano, C. Sanz</creator>
<creator>Marin-Lechado, C.</creator>
<creator>Ruano, P.</creator>
<creator>Benmakhlouf, M.</creator>
<creator>Akil, M.</creator>
<creator>Lopez-Garrido, A. C.</creator>
<creator>Chabli, A.</creator>
<creator>Ahmamou, M.</creator>
<creator>Gonzalez-Castillo, Lourdes</creator>
<contributor>Instituto Geológico y Minero de España [Granada] ; Instituto Geológico y Minero de España (IGME)</contributor>
<contributor>Manteau et Interfaces ; Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS) - Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>IACT, CSIC-Universidad de Granada ; Université du Québec</contributor>
<contributor>Faculté des Sciences, Université Mohammed V - Agdal ; Université du Québec</contributor>
<contributor>Departamento de Geodinámica, Universidad de Granada ; Université du Québec</contributor>
<contributor>Département de Géologie, Faculté des Sciences, Université Abdelmalek Esaadi, Tetouan ; Université du Québec</contributor>
<description>International audience</description>
<source>ISSN: 0264-3707</source>
<source>Journal of Geodynamics</source>
<publisher>Elsevier</publisher>
<identifier>hal-00671033</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00671033</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00671033</source>
<source>Journal of Geodynamics, Elsevier, 2011, 52, pp.83-96. 〈10.1016/j.jog.2010.12.003〉</source>
<identifier>DOI : 10.1016/j.jog.2010.12.003</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jog.2010.12.003</relation>
<language>en</language>
<subject lang=en>Subduction zones</subject>
<subject lang=en>Active tectonics</subject>
<subject lang=en>Western Mediterranean</subject>
<subject lang=en>etic and Rif Cordilleras</subject>
<subject lang=en>Gibraltar orogenic arc</subject>
<subject>[SDU.STU.TE] Sciences of the Universe [physics]/Earth Sciences/Tectonics</subject>
<subject>[SDE.MCG] Environmental Sciences/Global Changes</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>We present a new set of brittle microtectonic measurements carried out in the Pliocene and Quaternary rocks outcropping in several key sectors of the western Betic and Rif orogen, the so-called Gibraltar orogenic arc. This data set, along with available earthquake focal mechanisms and borehole breakouts, allowed us to compile the Pliocene and Quaternary stress map of this area. This map provides new constraints for tectonic models and the present-day tectonic activity of the proposed active eastward subduction of oceanic lithosphere beneath the Gibraltar Arc and roll-back. The horizontal maximum compressive stress (S-Hmax) is NW-SE in the Betic Orogen and N-S/NNW-SSE in the southern Rif Cordillera. There is a significant consistency between S-Hmax and the displacement field deduced from GPS measurements with respect to the African plate: both appear to reflect the NW-SE convergence between the African and the European plates that is perturbed in the Rif. We propose that part of the eastern Rif behaves as a quasi-rigid block welded to the stable African plate. This block is bounded by important faults that localized most of the deformation disturbing the stress and surface displacement field. Pliocene to Quaternary N-S to NW-SE Africa-Europe plate convergence seem to be associated to the reorganization of the remnant Early Miocene subduction system in a continental-continental collision framework. Three-dimensional reconstruction of available seismic tomography plotted against the intermediate seismicity shows that only part of the old subduction system, whose orientation ranges from N20 degrees E to N100 degrees E, remains active: the portion ranging from N30 degrees E to N40 degrees E, orthogonal to the regional convergence. (C) 2011 Elsevier Ltd. All rights reserved.</description>
<date>2011</date>
</dc>
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