untitled
<OAI-PMH schemaLocation=http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd>
<responseDate>2018-01-15T18:37:29Z</responseDate>
<request identifier=oai:HAL:insu-00769762v1 verb=GetRecord metadataPrefix=oai_dc>http://api.archives-ouvertes.fr/oai/hal/</request>
<GetRecord>
<record>
<header>
<identifier>oai:HAL:insu-00769762v1</identifier>
<datestamp>2018-01-11</datestamp>
<setSpec>type:ART</setSpec>
<setSpec>subject:sdu</setSpec>
<setSpec>subject:phys</setSpec>
<setSpec>subject:sde</setSpec>
<setSpec>collection:CEA</setSpec>
<setSpec>collection:SDE</setSpec>
<setSpec>collection:CNRS</setSpec>
<setSpec>collection:INSU</setSpec>
<setSpec>collection:UNIV-BREST</setSpec>
<setSpec>collection:GM</setSpec>
<setSpec>collection:GIP-BE</setSpec>
<setSpec>openaire</setSpec>
<setSpec>collection:AGROPOLIS</setSpec>
<setSpec>collection:UNIV-AG</setSpec>
<setSpec>collection:B3ESTE</setSpec>
<setSpec>collection:UNIV-MONTPELLIER</setSpec>
<setSpec>collection:LGO</setSpec>
<setSpec>collection:CMM</setSpec>
</header>
<metadata><dc>
<publisher>HAL CCSD</publisher>
<title lang=en>The Gibraltar subduction: A decade of new geophysical data</title>
<creator>Gutscher, Marc-André, </creator>
<creator>Dominguez, Stephane</creator>
<creator>Westbrook, Graham K.</creator>
<creator>Le Roy, Pascal, </creator>
<creator>Rosas, F.</creator>
<creator>Duarte, J.C.</creator>
<creator>Terrinha, P.</creator>
<creator>Miranda, J.M.</creator>
<creator>Graindorge, David</creator>
<creator>Gailler, A.</creator>
<creator>Sallarès, V.</creator>
<creator>Bartolome, R.</creator>
<contributor>Domaines Océaniques (LDO) ; Institut national des sciences de l'Univers (INSU - CNRS) - Université de Brest (UBO) - Observatoire des Sciences de l'Univers - Institut d'écologie et environnement - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>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)</contributor>
<contributor>University Birmingham ; University of Birmingham [Birmingham]</contributor>
<contributor>Geology Department ; University of Lisbon</contributor>
<contributor>School of Geosciences ; Monash University [Clayton]</contributor>
<contributor>IDL, Universidade de Lisboa, Lisbon ; Université du Québec</contributor>
<contributor>FFCUL/CGUL Centro de Geofisica ; Universidade de Libsoa</contributor>
<contributor>Commissariat à l'Energie Atomique ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)</contributor>
<contributor>Unitat de Tecnologia Marina ; Centre Mediterrani d'Investigacions Marines I ambientals</contributor>
<description>International audience</description>
<source>ISSN: 0040-1951</source>
<source>EISSN: 1879-3266</source>
<source>Tectonophysics</source>
<publisher>Elsevier</publisher>
<identifier>insu-00769762</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-00769762</identifier>
<source>https://hal-insu.archives-ouvertes.fr/insu-00769762</source>
<source>Tectonophysics, Elsevier, 2012, 574-575, pp.72-91. 〈10.1016/j.tecto.2012.08.038〉</source>
<identifier>DOI : 10.1016/j.tecto.2012.08.038</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.tecto.2012.08.038</relation>
<language>en</language>
<subject lang=en>Iberia</subject>
<subject lang=en>Roll-back subduction</subject>
<subject lang=en>Tethys oceanic lithosphere</subject>
<subject lang=en>Accretionary wedge</subject>
<subject lang=en>Active deformation</subject>
<subject lang=en>Earthquakes</subject>
<subject>[SDU.STU.GP] Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]</subject>
<subject>[PHYS.PHYS.PHYS-GEO-PH] Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph]</subject>
<subject>[SDE.MCG] Environmental Sciences/Global Changes</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>The Gibraltar arc, spans a complex portion of the Africa-Eurasia plate boundary marked by slow oblique convergence and intermediate and deep focus seismicity. The seemingly contradictory observations of a young extensional marine basin surrounded by an arcuate fold-and-thrust belt, have led to competing geodynamic models (delamination and subduction). Geophysical data acquired in the past decade provide a test for these models and support a narrow east-dipping, subduction zone. Seismic refraction studies indicate oceanic crust below the western Gulf of Cadiz. Tomography of the upper mantle reveals a steep, east-dipping high P-wave velocity body, beneath Gibraltar. The anisotropic mantle fabric from SKS splitting shows arc-parallel "fast directions", consistent with toroidal flow around a narrow, westward retreating subducting slab. The accompanying WSW advance of the Rif-Betic mountain belt has constructed a thick pile of deformed sediments, an accretionary wedge, characterized by west-vergent thrust anticlines. Bathymetric swath‐mapping images an asymmetric embayment at the deformation front where a 2 km high basement ridge has collided. Subduction has slowed significantly since 5 Ma, but deformation of recent sediments and abundant mud volcanoes suggest ongoing activity in the accretionary wedge. Three possible origins for this deformation are discussed; gravitational spreading, overall NW-SE convergence between Africa and Iberia and finally a WSW tectonic push from slow, but ongoing roll-back subduction. In the absence of arc volcanism and shallow dipping thrust type earthquakes, evidence in favor of present-day subduction can only be indirect and remains the object of debate. Continued activity of the subduction offers a possible explanation for great (M > 8.5) earthquakes known to affect the area, like the famous 1755 Great Lisbon earthquake. Recent GPS studies show SW motion of stations in N Morocco at velocities of 3-6 mm/yr indicating the presence of an independent block, a "Rif-Betic-Alboran" microplate, situated between Iberia and Africa.</description>
<date>2012-10-29</date>
<contributor>European Project : 34220, NEAREST</contributor>
<relation>info:eu-repo/grantAgreement//34220/EU/INTEGRATED OBSERVATIONS FROM NEAR SHORE SOURCES OF TSUNAMIS: TOWARDS AN EARLY WARNING SYSTEM/NEAREST</relation>
</dc>
</metadata>
</record>
</GetRecord>
</OAI-PMH>
