The seismic crustal structure of the Ossa-Morena zone and its geological interpretation
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 int...
| Autores: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2004 |
| País: | España |
| Institución: | Universidad de Huelva (UHU) |
| Repositorio: | Arias Montano. Repositorio Institucional de la Universidad de Huelva |
| Idioma: | inglés |
| OAI Identifier: | oai:ariasmontano.uhu.es:10272/6678 |
| Acceso en línea: | http://hdl.handle.net/10272/6678 |
| Access Level: | acceso abierto |
| Palabra clave: | Deep seismic reflection Structure of the crust Variscan orogen Ossa-Morena Zone Sísmica profunda de reflexión Estructura de la corteza Orógeno varíscico Zona Ossa Morena |
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The seismic crustal structure of the Ossa-Morena zone and its geological interpretationLa estructura sísmica de la corteza de la Zona de Ossa Morena y su interpretación geológicaSimancas Cabrera, J. F.Carbonell, RamónGonzález Lodeiro, FranciscoPérez Estaún, A.Juhlin, C.Ayarza, P.Azor, A.Martínez Poyatos, DavidRuiz de Almodóvar Sel, GabrielPascual Martínez, EmilioSáez Ramos, ReinaldoKashubin, A.Alonso Chaves, Francisco ManuelÁlvarez Marrón, J.Bohoyo, FernandoCastillo, S.Donaire Romero, TeodosioExpósito Ramos, InmaculadaFlecha, I.Galadí, E.Galindo Zaldívar, JesúsGonzález Barrionuevo, FelipeGonzález Cuadra, P.Macías, I.Martí, D.Martín, A.Martín Parra, L. M.Nieto Liñán, José MiguelPalm, H.Ruano, PatriciaRuiz, MarioToscano Grande, AntonioDeep seismic reflectionStructure of the crustVariscan orogenOssa-Morena ZoneSísmica profunda de reflexiónEstructura de la cortezaOrógeno varíscicoZona Ossa MorenaThe 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.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.Universidad Complutense de Madrid20042004-01-0120042004-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10272/6678reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelvainstname:Universidad de Huelva (UHU)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Atribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:ariasmontano.uhu.es:10272/66782026-06-02T14:58:11Z |
| dc.title.none.fl_str_mv |
The seismic crustal structure of the Ossa-Morena zone and its geological interpretation La estructura sísmica de la corteza de la Zona de Ossa Morena y su interpretación geológica |
| title |
The seismic crustal structure of the Ossa-Morena zone and its geological interpretation |
| spellingShingle |
The seismic crustal structure of the Ossa-Morena zone and its geological interpretation Simancas Cabrera, J. F. Deep seismic reflection Structure of the crust Variscan orogen Ossa-Morena Zone Sísmica profunda de reflexión Estructura de la corteza Orógeno varíscico Zona Ossa Morena |
| title_short |
The seismic crustal structure of the Ossa-Morena zone and its geological interpretation |
| title_full |
The seismic crustal structure of the Ossa-Morena zone and its geological interpretation |
| title_fullStr |
The seismic crustal structure of the Ossa-Morena zone and its geological interpretation |
| title_full_unstemmed |
The seismic crustal structure of the Ossa-Morena zone and its geological interpretation |
| title_sort |
The seismic crustal structure of the Ossa-Morena zone and its geological interpretation |
| dc.creator.none.fl_str_mv |
Simancas Cabrera, J. F. Carbonell, Ramón González Lodeiro, Francisco Pérez Estaún, A. Juhlin, C. Ayarza, P. Azor, A. Martínez Poyatos, David Ruiz de Almodóvar Sel, Gabriel Pascual Martínez, Emilio Sáez Ramos, Reinaldo Kashubin, A. Alonso Chaves, Francisco Manuel Álvarez Marrón, J. Bohoyo, Fernando Castillo, S. Donaire Romero, Teodosio Expósito Ramos, Inmaculada Flecha, I. Galadí, E. Galindo Zaldívar, Jesús González Barrionuevo, Felipe González Cuadra, P. Macías, I. Martí, D. Martín, A. Martín Parra, L. M. Nieto Liñán, José Miguel Palm, H. Ruano, Patricia Ruiz, Mario Toscano Grande, Antonio |
| author |
Simancas Cabrera, J. F. |
| author_facet |
Simancas Cabrera, J. F. Carbonell, Ramón González Lodeiro, Francisco Pérez Estaún, A. Juhlin, C. Ayarza, P. Azor, A. Martínez Poyatos, David Ruiz de Almodóvar Sel, Gabriel Pascual Martínez, Emilio Sáez Ramos, Reinaldo Kashubin, A. Alonso Chaves, Francisco Manuel Álvarez Marrón, J. Bohoyo, Fernando Castillo, S. Donaire Romero, Teodosio Expósito Ramos, Inmaculada Flecha, I. Galadí, E. Galindo Zaldívar, Jesús González Barrionuevo, Felipe González Cuadra, P. Macías, I. Martí, D. Martín, A. Martín Parra, L. M. Nieto Liñán, José Miguel Palm, H. Ruano, Patricia Ruiz, Mario Toscano Grande, Antonio |
| author_role |
author |
| author2 |
Carbonell, Ramón González Lodeiro, Francisco Pérez Estaún, A. Juhlin, C. Ayarza, P. Azor, A. Martínez Poyatos, David Ruiz de Almodóvar Sel, Gabriel Pascual Martínez, Emilio Sáez Ramos, Reinaldo Kashubin, A. Alonso Chaves, Francisco Manuel Álvarez Marrón, J. Bohoyo, Fernando Castillo, S. Donaire Romero, Teodosio Expósito Ramos, Inmaculada Flecha, I. Galadí, E. Galindo Zaldívar, Jesús González Barrionuevo, Felipe González Cuadra, P. Macías, I. Martí, D. Martín, A. Martín Parra, L. M. Nieto Liñán, José Miguel Palm, H. Ruano, Patricia Ruiz, Mario Toscano Grande, Antonio |
| author2_role |
author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
|
| dc.subject.none.fl_str_mv |
Deep seismic reflection Structure of the crust Variscan orogen Ossa-Morena Zone Sísmica profunda de reflexión Estructura de la corteza Orógeno varíscico Zona Ossa Morena |
| topic |
Deep seismic reflection Structure of the crust Variscan orogen Ossa-Morena Zone Sísmica profunda de reflexión Estructura de la corteza Orógeno varíscico Zona Ossa Morena |
| description |
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. |
| publishDate |
2004 |
| dc.date.none.fl_str_mv |
2004 2004-01-01 2004 2004-01-01 |
| dc.type.none.fl_str_mv |
journal article http://purl.org/coar/resource_type/c_6501 |
| dc.type.openaire.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/10272/6678 |
| url |
http://hdl.handle.net/10272/6678 |
| dc.language.none.fl_str_mv |
Inglés eng |
| language_invalid_str_mv |
Inglés |
| language |
eng |
| dc.rights.none.fl_str_mv |
open access http://purl.org/coar/access_right/c_abf2 Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
| dc.rights.openaire.fl_str_mv |
info:eu-repo/semantics/openAccess |
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open access http://purl.org/coar/access_right/c_abf2 Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
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openAccess |
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application/pdf |
| dc.publisher.none.fl_str_mv |
Universidad Complutense de Madrid |
| publisher.none.fl_str_mv |
Universidad Complutense de Madrid |
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reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelva instname:Universidad de Huelva (UHU) |
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Universidad de Huelva (UHU) |
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Arias Montano. Repositorio Institucional de la Universidad de Huelva |
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Arias Montano. Repositorio Institucional de la Universidad de Huelva |
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1869420708053909504 |
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15.81155 |