The basal tectonic mélange of the Cabo Ortegal Complex (NW Iberian Massif): a key unit in the suture of Pangea
[EN] Recent field work and mapping in the lower units of the Cabo Ortegal Complex provided new data about the tectonic mélange that appears in the lowest structural position: the Somozas Mélange. This mélange unit with average thickness of 1800 m is restricted to the eastern part of the complex, and...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2009 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/26764 |
| Acceso en línea: | http://hdl.handle.net/10261/26764 |
| Access Level: | acceso abierto |
| Palabra clave: | Ophiolitic mélanges Rheic Ocean Island arc U-Pb zircon geochronology |
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oai:digital.csic.es:10261/26764 |
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España |
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The basal tectonic mélange of the Cabo Ortegal Complex (NW Iberian Massif): a key unit in the suture of PangeaLa mélange tectónica basal del Complejo de Cabo Ortegal (NW del Macizo Ibérico): una unidad clave en la sutura de PangeaArenas, RicardoSánchez Martínez, SoniaCastiñeiras García, P.Jeffries, T. E.Díez Fernández, RubénAndonaegui, P.Ophiolitic mélangesRheic OceanIsland arcU-Pb zircon geochronology[EN] Recent field work and mapping in the lower units of the Cabo Ortegal Complex provided new data about the tectonic mélange that appears in the lowest structural position: the Somozas Mélange. This mélange unit with average thickness of 1800 m is restricted to the eastern part of the complex, and is located at the advancing front of the allochthonous complexes of NW Iberia. Three rock units are involved in the mélange: 1) an ophiolitic mélange consisting of igneous rocks mixed with serpentinites; 2) a metasedimentary unit with phyllites and phyllonites, with scarce conglomerates, marbles and quartzites; 3) high-T metamorphic rocks with varied types of amphibolites and orthogneisses.[ES] Nuevos datos de campo y cartográficos en las unidades inferiores del Complejo de Cabo Ortegal, han proporcionado información relevante sobre la mélange tectónica situada en la posición estructural inferior: la Mélange de Somozas. Esta unidad de mélange tiene una potencia media de unos 1800 m y su aparición está restringida a la parte oriental del complejo; representa por tanto una gran unidad de mezcla localizada en el frente de avance de los complejos alóctonos del NW de Iberia. Tres conjuntos litológicos diferentes se distinguen en la mélange: 1) un conjunto formado por rocas ígneas mezcladas con serpentinitas, formando una mélange ofiolítica típica; 2) un conjunto metasedimentario con filitas y filonitas, con escasos conglomerados, mármoles y cuarcitas; 3) rocas metamórficas de alta-T con tipos variados de anfibolitas y ortogneises.Financial support for this research has been provided by Spanish project CGL2007-65338-CO2-01/BTE (Ministerio de Ciencia e Innovación).Peer reviewedUniversidad Complutense de Madrid201020102009info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_65014235875 bytesapplication/pdfhttp://hdl.handle.net/10261/26764reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://www.ucm.es/info/estratig/JIG/vol_content/abstjour35_2.htminfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/267642026-05-22T06:33:51Z |
| dc.title.none.fl_str_mv |
The basal tectonic mélange of the Cabo Ortegal Complex (NW Iberian Massif): a key unit in the suture of Pangea La mélange tectónica basal del Complejo de Cabo Ortegal (NW del Macizo Ibérico): una unidad clave en la sutura de Pangea |
| title |
The basal tectonic mélange of the Cabo Ortegal Complex (NW Iberian Massif): a key unit in the suture of Pangea |
| spellingShingle |
The basal tectonic mélange of the Cabo Ortegal Complex (NW Iberian Massif): a key unit in the suture of Pangea Arenas, Ricardo Ophiolitic mélanges Rheic Ocean Island arc U-Pb zircon geochronology |
| title_short |
The basal tectonic mélange of the Cabo Ortegal Complex (NW Iberian Massif): a key unit in the suture of Pangea |
| title_full |
The basal tectonic mélange of the Cabo Ortegal Complex (NW Iberian Massif): a key unit in the suture of Pangea |
| title_fullStr |
The basal tectonic mélange of the Cabo Ortegal Complex (NW Iberian Massif): a key unit in the suture of Pangea |
| title_full_unstemmed |
The basal tectonic mélange of the Cabo Ortegal Complex (NW Iberian Massif): a key unit in the suture of Pangea |
| title_sort |
The basal tectonic mélange of the Cabo Ortegal Complex (NW Iberian Massif): a key unit in the suture of Pangea |
| dc.creator.none.fl_str_mv |
Arenas, Ricardo Sánchez Martínez, Sonia Castiñeiras García, P. Jeffries, T. E. Díez Fernández, Rubén Andonaegui, P. |
| author |
Arenas, Ricardo |
| author_facet |
Arenas, Ricardo Sánchez Martínez, Sonia Castiñeiras García, P. Jeffries, T. E. Díez Fernández, Rubén Andonaegui, P. |
| author_role |
author |
| author2 |
Sánchez Martínez, Sonia Castiñeiras García, P. Jeffries, T. E. Díez Fernández, Rubén Andonaegui, P. |
| author2_role |
author author author author author |
| dc.subject.none.fl_str_mv |
Ophiolitic mélanges Rheic Ocean Island arc U-Pb zircon geochronology |
| topic |
Ophiolitic mélanges Rheic Ocean Island arc U-Pb zircon geochronology |
| description |
[EN] Recent field work and mapping in the lower units of the Cabo Ortegal Complex provided new data about the tectonic mélange that appears in the lowest structural position: the Somozas Mélange. This mélange unit with average thickness of 1800 m is restricted to the eastern part of the complex, and is located at the advancing front of the allochthonous complexes of NW Iberia. Three rock units are involved in the mélange: 1) an ophiolitic mélange consisting of igneous rocks mixed with serpentinites; 2) a metasedimentary unit with phyllites and phyllonites, with scarce conglomerates, marbles and quartzites; 3) high-T metamorphic rocks with varied types of amphibolites and orthogneisses. |
| publishDate |
2009 |
| dc.date.none.fl_str_mv |
2009 2010 2010 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 |
| format |
article |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/10261/26764 |
| url |
http://hdl.handle.net/10261/26764 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
http://www.ucm.es/info/estratig/JIG/vol_content/abstjour35_2.htm |
| dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
4235875 bytes application/pdf |
| dc.publisher.none.fl_str_mv |
Universidad Complutense de Madrid |
| publisher.none.fl_str_mv |
Universidad Complutense de Madrid |
| dc.source.none.fl_str_mv |
reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC) |
| instname_str |
Consejo Superior de Investigaciones Científicas (CSIC) |
| reponame_str |
DIGITAL.CSIC. Repositorio Institucional del CSIC |
| collection |
DIGITAL.CSIC. Repositorio Institucional del CSIC |
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|
| repository.mail.fl_str_mv |
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| _version_ |
1869419033964576768 |
| score |
15.81155 |