| dc.creator |
Simancas, José Fernando |
|
| dc.creator |
Expósito, I. |
|
| dc.creator |
Flecha, I. |
|
| dc.creator |
Galadí, E. |
|
| dc.creator |
Galindo-Zaldívar, Jesús |
|
| dc.creator |
González-Lodeiro, Francisco |
|
| dc.creator |
González Cuadra, P. |
|
| dc.creator |
Macías, I. |
|
| dc.creator |
Martí, David |
|
| dc.creator |
Martín, A. |
|
| dc.creator |
Martín Parra, L. M. |
|
| dc.creator |
Nieto, José Miguel |
|
| dc.creator |
Palm, H. |
|
| dc.creator |
Ruano, P. |
|
| dc.creator |
Ruiz Fernández, Mario |
|
| dc.creator |
Donaire, T. |
|
| dc.creator |
Castillo, S. |
|
| dc.creator |
Carbonell, Ramón |
|
| dc.creator |
González-Lodeiro, Francisco |
|
| dc.creator |
Pérez-Estaún, Andrés |
|
| dc.creator |
Juhlin, C. |
|
| dc.creator |
Ayarza, P. |
|
| dc.creator |
Azor, Antonio |
|
| dc.creator |
Martínez-Poyatos, David |
|
| dc.creator |
Almodóvar, G. R. |
|
| dc.creator |
Pascual, E. |
|
| dc.creator |
Sáez, R. |
|
| dc.creator |
Kashubin, A. |
|
| dc.creator |
Alonso, F. |
|
| dc.creator |
Alvarez-Marrón, Joaquina |
|
| dc.creator |
Bohoyo, F. |
|
| dc.creator |
Toscano, M. |
|
| dc.date |
2008-07-02T10:30:11Z |
|
| dc.date |
2008-07-02T10:30:11Z |
|
| dc.date |
2004 |
|
| dc.date.accessioned |
2017-01-31T02:18:08Z |
|
| dc.date.available |
2017-01-31T02:18:08Z |
|
| dc.identifier |
Journal of Iberian Geology 30 (2004) 133-142 |
|
| dc.identifier |
0378-102X |
|
| dc.identifier |
http://hdl.handle.net/10261/5510 |
|
| dc.identifier.uri |
http://dspace.mediu.edu.my:8181/xmlui/handle/10261/5510 |
|
| dc.description |
[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. |
|
| dc.description |
[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. |
|
| dc.description |
Funding 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. |
|
| dc.description |
Peer reviewed |
|
| dc.format |
852548 bytes |
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| dc.format |
application/pdf |
|
| dc.language |
eng |
|
| dc.publisher |
Universidad Complutense de Madrid |
|
| dc.rights |
openAccess |
|
| dc.subject |
Deep seismic reflection |
|
| dc.subject |
Structure of the crust |
|
| dc.subject |
Variscan orogen |
|
| dc.subject |
Ossa-Morena Zone |
|
| dc.subject |
Sísmica profunda de reflexión |
|
| dc.subject |
Estructura de la corteza |
|
| dc.subject |
Orógeno varíscico |
|
| dc.subject |
Zona Ossa Morena |
|
| dc.title |
The Seismic Crustal Structure of the Ossa-Morena Zone and its geological interpretation |
|
| dc.title |
La estructura sísmica de la corteza de la Zona de Ossa Morena y su interpretación geológica |
|
| dc.type |
Artículo |
|