Morphological and structural analysis in the Anaga offshore massif, Canary Islands: fractures and debris avalanches relationships.

As part of the ‘National Hydrographic and Oceanographic Research Plan for the Spanish Exclusive Economic Zone’, multibeam bathymetry and seismic reflection profiles were obtained in the Canary Islands aboard the R/V Hespérides. The submarine flanks of the Anaga offshore extension of Tenerife Island...

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Autores: Llanes-Estrada, Pilar, Pereiro-Muñoz, José Antonio, Muñoz-Martín, A., Acosta-Yepes, Juan, Herranz-Cano, Pedro, Carbó, P., Palomo-Pedraza, Carlos, ZEE Working Group
Tipo de recurso: artículo
Fecha de publicación:2005
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/320036
Acceso en línea:http://hdl.handle.net/10261/320036
Access Level:acceso abierto
Palabra clave:Medio Marino
Sede Central IEO
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spelling Morphological and structural analysis in the Anaga offshore massif, Canary Islands: fractures and debris avalanches relationships.Llanes-Estrada, PilarPereiro-Muñoz, José AntonioMuñoz-Martín, A.Acosta-Yepes, JuanHerranz-Cano, PedroCarbó, P.Palomo-Pedraza, CarlosZEE Working GroupMedio MarinoSede Central IEOAs part of the ‘National Hydrographic and Oceanographic Research Plan for the Spanish Exclusive Economic Zone’, multibeam bathymetry and seismic reflection profiles were obtained in the Canary Islands aboard the R/V Hespérides. The submarine flanks of the Anaga offshore extension of Tenerife Island are here studied to analyze its geomorphology. In the north sector of the Anaga submarine massif, the extension of the Anaga Debris Avalanche has been mapped for the first time, and a volume of 36 km3 was calculated. The relationship between the Anaga and Orotava Debris Avalanches is also described. Faulting has been recognized as a key process for the occurrence of debris avalanches and the growth of volcanic lineaments. Moreover, faulting affects previous structures and the channelling of debris flows. Structural analysis shows the typical radial pattern of an oceanic island. In addition, a NE-SW dominant direction of faulting was obtained, consistent with the Tenerife Island structural trend seen in the Anaga Massif and Cordillera Dorsal. NW-SE and E-W are two other main trends seen in the area. Special interest is manifest in two long faults: ‘Santa Cruz Fault’ bounds the southern edge of Anaga offshore Massif with a length of 50 km and a direction that changes from NE-SW to almost E-W. The Güimar Debris Avalanche was probably channeled by this fault. The ‘Guayotá Fault’ was recognized in several seismic profiles with a N-S direction that changes towards NW-SE at its southern end. This fault affects the more recent sediments with a vertical offset of 25–30 m, along 60 km. It has been interpreted as a transpressive strike-slip fault.Sí202320232005info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/320036reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésSede Central IEOinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3200362026-05-22T06:33:51Z
dc.title.none.fl_str_mv Morphological and structural analysis in the Anaga offshore massif, Canary Islands: fractures and debris avalanches relationships.
title Morphological and structural analysis in the Anaga offshore massif, Canary Islands: fractures and debris avalanches relationships.
spellingShingle Morphological and structural analysis in the Anaga offshore massif, Canary Islands: fractures and debris avalanches relationships.
Llanes-Estrada, Pilar
Medio Marino
Sede Central IEO
title_short Morphological and structural analysis in the Anaga offshore massif, Canary Islands: fractures and debris avalanches relationships.
title_full Morphological and structural analysis in the Anaga offshore massif, Canary Islands: fractures and debris avalanches relationships.
title_fullStr Morphological and structural analysis in the Anaga offshore massif, Canary Islands: fractures and debris avalanches relationships.
title_full_unstemmed Morphological and structural analysis in the Anaga offshore massif, Canary Islands: fractures and debris avalanches relationships.
title_sort Morphological and structural analysis in the Anaga offshore massif, Canary Islands: fractures and debris avalanches relationships.
dc.creator.none.fl_str_mv Llanes-Estrada, Pilar
Pereiro-Muñoz, José Antonio
Muñoz-Martín, A.
Acosta-Yepes, Juan
Herranz-Cano, Pedro
Carbó, P.
Palomo-Pedraza, Carlos
ZEE Working Group
author Llanes-Estrada, Pilar
author_facet Llanes-Estrada, Pilar
Pereiro-Muñoz, José Antonio
Muñoz-Martín, A.
Acosta-Yepes, Juan
Herranz-Cano, Pedro
Carbó, P.
Palomo-Pedraza, Carlos
ZEE Working Group
author_role author
author2 Pereiro-Muñoz, José Antonio
Muñoz-Martín, A.
Acosta-Yepes, Juan
Herranz-Cano, Pedro
Carbó, P.
Palomo-Pedraza, Carlos
ZEE Working Group
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Medio Marino
Sede Central IEO
topic Medio Marino
Sede Central IEO
description As part of the ‘National Hydrographic and Oceanographic Research Plan for the Spanish Exclusive Economic Zone’, multibeam bathymetry and seismic reflection profiles were obtained in the Canary Islands aboard the R/V Hespérides. The submarine flanks of the Anaga offshore extension of Tenerife Island are here studied to analyze its geomorphology. In the north sector of the Anaga submarine massif, the extension of the Anaga Debris Avalanche has been mapped for the first time, and a volume of 36 km3 was calculated. The relationship between the Anaga and Orotava Debris Avalanches is also described. Faulting has been recognized as a key process for the occurrence of debris avalanches and the growth of volcanic lineaments. Moreover, faulting affects previous structures and the channelling of debris flows. Structural analysis shows the typical radial pattern of an oceanic island. In addition, a NE-SW dominant direction of faulting was obtained, consistent with the Tenerife Island structural trend seen in the Anaga Massif and Cordillera Dorsal. NW-SE and E-W are two other main trends seen in the area. Special interest is manifest in two long faults: ‘Santa Cruz Fault’ bounds the southern edge of Anaga offshore Massif with a length of 50 km and a direction that changes from NE-SW to almost E-W. The Güimar Debris Avalanche was probably channeled by this fault. The ‘Guayotá Fault’ was recognized in several seismic profiles with a N-S direction that changes towards NW-SE at its southern end. This fault affects the more recent sediments with a vertical offset of 25–30 m, along 60 km. It has been interpreted as a transpressive strike-slip fault.
publishDate 2005
dc.date.none.fl_str_mv 2005
2023
2023
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/10261/320036
url http://hdl.handle.net/10261/320036
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Sede Central IEO
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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
repository.name.fl_str_mv
repository.mail.fl_str_mv
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