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dc.contributor.authorSimancas, José Fernando-
dc.contributor.authorExpósito, I.-
dc.contributor.authorFlecha, I.-
dc.contributor.authorGaladí, E.-
dc.contributor.authorGalindo-Zaldívar, Jesús-
dc.contributor.authorGonzález-Lodeiro, Francisco-
dc.contributor.authorGonzález Cuadra, P.-
dc.contributor.authorMacías, I.-
dc.contributor.authorMartí, David-
dc.contributor.authorMartín, A.-
dc.contributor.authorMartín Parra, L. M.-
dc.contributor.authorNieto, José Miguel-
dc.contributor.authorPalm, H.-
dc.contributor.authorRuano, P.-
dc.contributor.authorRuiz Fernández, Mario-
dc.contributor.authorDonaire, T.-
dc.contributor.authorCastillo, S.-
dc.contributor.authorCarbonell, Ramón-
dc.contributor.authorGonzález-Lodeiro, Francisco-
dc.contributor.authorPérez-Estaún, Andrés-
dc.contributor.authorJuhlin, C.-
dc.contributor.authorAyarza, P.-
dc.contributor.authorAzor, Antonio-
dc.contributor.authorMartínez-Poyatos, David-
dc.contributor.authorAlmodóvar, G. R.-
dc.contributor.authorPascual, E.-
dc.contributor.authorSáez, R.-
dc.contributor.authorKashubin, A.-
dc.contributor.authorAlonso, F.-
dc.contributor.authorAlvarez-Marrón, Joaquina-
dc.contributor.authorBohoyo, Fernando-
dc.contributor.authorToscano, M.-
dc.identifier.citationJournal of Iberian Geology 30 (2004) 133-142en_US
dc.description.abstract[EN] The IBERSEIS deep reflection seismic experiment has provided a crustal image of the Variscan orogen of southwest Iberia. A brief presentation of the entire seismic profile is given, and then the Ossa-Morena Zone (OMZ) and its boundaries are considered. The crust of the OMZ is shown to be divided into an upper crust, characterized by dominantly NE-dipping reflectivity, and a poorly reflective lower crust. The reflectivity of the upper crust has good correlation with the geological cross-section constructed from surface mapping. In the seismic image, the upper crustal geological structures are seen to merge in the middle crust. Nevertheless, the OMZ middle crust is not a mere detachment level, as it shows very unusual features: it appears as a band of strong reflectivity and irregular thickness (the Iberian Reflective Body, IRB) that we interpret as a great sill-like intrusion of basic rocks. The boundaries of the OMZ are considered sutures of the orogen, and their geometrical features, as deduced from geological mapping and the seismic image, are in accordance with the transpressional character of the Variscan collision recorded in SW Iberia. The present Moho is flat, obliterating the root of the orogen.en_US
dc.description.abstract[ES] El experimento de sísmica de reflexión profunda IBERSEIS ha proporcionado una imagen de la corteza del Orógeno Varisco en el sudoeste de Iberia. Este artículo se centra en la descripción de la corteza de la Zona de Ossa Morena (OMZ), que está claramente dividida en una corteza superior, con reflectividad de buzamiento al NE, y una corteza inferior de pobre reflectividad. Las estructuras geológicas cartografiadas en superficie se correlacionan bien con la reflectividad de la corteza superior, y en la imagen sísmica se ven enraizar en la corteza media. Ésta está constituida por un cuerpo muy reflectivo, interpretado como una gran intrusión de rocas básicas. La imagen de las suturas que limitan la OMZ muestra el carácter fuertemente transpresivo de la colisión orogénica varisca registrada en el sudoeste de Iberia. La Moho actual es plana y, en consecuencia, no se observa la raíz del orógeno.en_US
dc.description.sponsorshipFunding for the field acquisition of the IBERSEIS deep seismic reflection profile has been provided by: CICYT-FEDER (1FD1997-2179/RYEN1), Junta de Andalucía, ENRESA, Swedish Research Council and the Instituto Geológico y Minero de España. This research was supported also by the Spanish Ministery of Science and Technology (grants: BTE2000-0583-C02-01, BTE2000-3035-E and BTE2000-1490-C02-01). We gratefully acknowledge the support given by J. Almarza and M. Donaire, from the Junta de Andalucía, and R. Rodríguez and J. L. Plata, from the Instituto Geológico y Minero de España. Finally, we thank the field crew of our contractor CGG for their assistance during the acquisition.en_US
dc.format.extent852548 bytes-
dc.publisherUniversidad Complutense de Madriden_US
dc.subjectDeep seismic reflectionen_US
dc.subjectStructure of the crusten_US
dc.subjectVariscan orogenen_US
dc.subjectOssa-Morena Zoneen_US
dc.subjectSísmica profunda de reflexiónen_US
dc.subjectEstructura de la cortezaen_US
dc.subjectOrógeno varíscicoen_US
dc.subjectZona Ossa Morenaen_US
dc.titleThe Seismic Crustal Structure of the Ossa-Morena Zone and its geological interpretationen_US
dc.title.alternativeLa estructura sísmica de la corteza de la Zona de Ossa Morena y su interpretación geológicaen_US
dc.description.peerreviewedPeer revieweden_US
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