Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/56369
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Campo DC | Valor | Lengua/Idioma |
---|---|---|
dc.contributor.author | Sallarès, Valentí | - |
dc.contributor.author | Gailler, Audrey | - |
dc.contributor.author | Gutscher, Marc-André | - |
dc.contributor.author | Graindorge, David | - |
dc.contributor.author | Bartolomé, Rafael | - |
dc.contributor.author | Gràcia, Eulàlia | - |
dc.contributor.author | Diaz, J. | - |
dc.contributor.author | Dañobeitia, Juan José | - |
dc.contributor.author | Zitellini, Nevio | - |
dc.date.issued | 2011-11 | - |
dc.identifier.citation | Earth and Planetary Science Letters 311(1-2): 112–123 (2011) | es_ES |
dc.identifier.issn | 0012-821X | - |
dc.identifier.uri | http://hdl.handle.net/10261/56369 | - |
dc.description | 12 pages, 9 figures | es_ES |
dc.description.abstract | We investigate the crustal structure of the SW Iberian margin along a 340 km-long refraction and wide-angle reflection seismic profile crossing from the central Gulf of Cadiz to the Variscan continental margin in the Algarve, Southern Portugal. The seismic velocity and crustal geometry model obtained by joint refraction and reflection travel-time inversion reveal three distinct crustal domains: the 28–30 km-thick Variscan crust in the north, a 60 km-wide transition zone offshore, where the crust abruptly thins ~ 20 km, and finally a ~ 7 km-thick and ~ 150 km-wide crustal section that appears to be oceanic in nature. The oceanic crust is overlain by a 1–3 km-thick section of Mesozoic to Eocene sediments, with an additional 3–4 km of low-velocity, unconsolidated sediments on top belonging to the Miocene age, Gulf of Cadiz imbricated wedge. The sharp transition between continental and oceanic crust is best explained by an initial rifting setting as a transform margin during the Early Jurassic that followed the continental break-up in the Central Atlantic. The narrow oceanic basin would have formed during an oblique rifting and seafloor spreading episode between Iberia and Africa that started shortly thereafter (Bajocian) and lasted up to the initiation of oceanic spreading in the North Atlantic at the Tithonian (late Jurassic-earliest Cretaceous). The velocity model displays four wide, prominent, south-dipping low-velocity anomalies, which seem to be related with the presence of crustal-scale faults previously identified in the area, some of which could well be extensional faults generated during this rifting episode. We propose that this oceanic plate segment is the last remnant of an oceanic corridor that once connected the Alpine-Tethys with the Atlantic ocean, so it is, in turn, one of the oldest oceanic crustal fragments currently preserved on Earth. The presence of oceanic crust in the central Gulf of Cadiz is consistent with geodynamic models suggesting the existence of a narrow, westward retreating oceanic slab beneath the Gibraltar arc-Alboran basin system | es_ES |
dc.description.sponsorship | The NEAREST project has been funded by the EU Programme “Integrating and Strengthening the European Research Area” of FP6, Sub-Priority 1.1.6.3, “Global Change and Ecosystems”, contract no. 037110, and the NEARESTSEIS survey was funded by the Complementary Action # CGL2006-27098-E/BTE of the Spanish MICINN. Additional funds were obtained from the MICINN projects MEDOC (CTM2007-66179-C02-02/MAR) and SHAKE (CGL2011-30005-C02-02). We also acknowledge funding from MICINN through the Ramon y Cajal program (R. Bartolomé). We finally acknowledge the collaboration of our research partners at Grup de Recerca de la Generalitat de Catalunya Barcelona Centre of Subsurface Imaging (B-CSI) ref. 2009 SGR 146 and funding support from Repsol-YPF | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.rights | openAccess | es_ES |
dc.subject | SW Iberian margin | es_ES |
dc.subject | Wide-angle seismics | es_ES |
dc.subject | Refraction and reflection travel-time tomography | es_ES |
dc.subject | Uncertainty analysis | es_ES |
dc.subject | Jurassic oceanic crust | es_ES |
dc.subject | Geodynamic evolution | es_ES |
dc.title | Seismic evidence for the presence of Jurassic oceanic crust in the central Gulf of Cadiz (SW Iberian margin) | es_ES |
dc.type | artículo | es_ES |
dc.identifier.doi | 10.1016/j.epsl.2011.09.003 | - |
dc.description.peerreviewed | Peer reviewed | es_ES |
dc.relation.publisherversion | https://doi.org/10.1016/j.epsl.2011.09.003 | es_ES |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.languageiso639-1 | en | - |
item.fulltext | With Fulltext | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.openairetype | artículo | - |
Aparece en las colecciones: | (Geo3Bcn) Artículos (UTM) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
Sallares_et_al_2011.pdf | 2,43 MB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
103
checked on 16-abr-2024
WEB OF SCIENCETM
Citations
93
checked on 25-feb-2024
Page view(s)
446
checked on 24-abr-2024
Download(s)
352
checked on 24-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.