Origin of a restraining bend in an evolving strike-slip system: The Cenozoic As Pontes basin (NW Spain)

The As Pontes basin (12 km2), NW Iberian Peninsula, is bounded by a double restraining bend of a dextral strike-slip fault, which is related to the western onshore end of the Pyrenean belt. Surface and subsurface data obtained from intensive coal exploration and mining in the basin since the 1960s t...

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Autores: Santanach i Prat, Pere F., 1946-, Ferrus i Pinyol, Bernat, Cabrera, Lluís, Sáez, Alberto
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2005
País:España
Recursos:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/16894
Acesso em linha:https://hdl.handle.net/2445/16894
Access Level:acceso abierto
Palavra-chave:Tectònica
Geologia estructural
Oligocè
Miocè
Serralada Cantàbrica
Tectonics (Geology)
Structural geology
Oligocene
Miocene
Cantabrian Mountains
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repository_id_str
spelling Origin of a restraining bend in an evolving strike-slip system: The Cenozoic As Pontes basin (NW Spain)Santanach i Prat, Pere F., 1946-Ferrus i Pinyol, BernatCabrera, LluísSáez, AlbertoTectònicaGeologia estructuralOligocèMiocèSerralada CantàbricaTectonics (Geology)Structural geologyOligoceneMioceneCantabrian MountainsThe As Pontes basin (12 km2), NW Iberian Peninsula, is bounded by a double restraining bend of a dextral strike-slip fault, which is related to the western onshore end of the Pyrenean belt. Surface and subsurface data obtained from intensive coal exploration and mining in the basin since the 1960s together with additional structural and stratigraphic sequence analysis allowed us to determine the geometric relationships between tectonic structures and stratigraphic markers. The small size of the basin and the large amount of quality data make the As Pontes basin a unique natural laboratory for improving our understanding of the origin and evolution of restraining bends. The double restraining bend is the end stage of the structural evolution of a compressive underlapping stepover, where the basin was formed. During the first stage (stepover stage), which began ca. 30 Ma ago (latest Rupelian) and lasted 3.4 My, two small isolated basins bounded by thrusts and normal faults were formed. For 1.3 My, the strike-slip faults, which defined the stepover, grew towards each other until joining and forming the double restraining bend, which bounds one large As Pontes basin (transition stage). The history of the basin was controlled by the activity of the double restraining bend for a further 3.4 My (restraining bend stage) and ended in mid-Aquitanian times (ca. 22 Ma).Universitat de Barcelona (UB). Institut de Ciències de la Terra Jaume Almera (ICTJA). Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDEA). Universitat Autonònoma de Barcelona (UAB). Consejo Superior de Investigaciones Científicas (CSIC)2005info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/16894Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a http://dx.doi.org/10.1344/105.000001393Geologica Acta, 2005, vol. 3, núm. 3, p. 225-239http://dx.doi.org/10.1344/105.000001393cc by-sa (c) Santanach et al., 2005http://creativecommons.org/licenses/by-sa/3.0/es/info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/168942026-05-27T06:46:51Z
dc.title.none.fl_str_mv Origin of a restraining bend in an evolving strike-slip system: The Cenozoic As Pontes basin (NW Spain)
title Origin of a restraining bend in an evolving strike-slip system: The Cenozoic As Pontes basin (NW Spain)
spellingShingle Origin of a restraining bend in an evolving strike-slip system: The Cenozoic As Pontes basin (NW Spain)
Santanach i Prat, Pere F., 1946-
Tectònica
Geologia estructural
Oligocè
Miocè
Serralada Cantàbrica
Tectonics (Geology)
Structural geology
Oligocene
Miocene
Cantabrian Mountains
title_short Origin of a restraining bend in an evolving strike-slip system: The Cenozoic As Pontes basin (NW Spain)
title_full Origin of a restraining bend in an evolving strike-slip system: The Cenozoic As Pontes basin (NW Spain)
title_fullStr Origin of a restraining bend in an evolving strike-slip system: The Cenozoic As Pontes basin (NW Spain)
title_full_unstemmed Origin of a restraining bend in an evolving strike-slip system: The Cenozoic As Pontes basin (NW Spain)
title_sort Origin of a restraining bend in an evolving strike-slip system: The Cenozoic As Pontes basin (NW Spain)
dc.creator.none.fl_str_mv Santanach i Prat, Pere F., 1946-
Ferrus i Pinyol, Bernat
Cabrera, Lluís
Sáez, Alberto
author Santanach i Prat, Pere F., 1946-
author_facet Santanach i Prat, Pere F., 1946-
Ferrus i Pinyol, Bernat
Cabrera, Lluís
Sáez, Alberto
author_role author
author2 Ferrus i Pinyol, Bernat
Cabrera, Lluís
Sáez, Alberto
author2_role author
author
author
dc.subject.none.fl_str_mv Tectònica
Geologia estructural
Oligocè
Miocè
Serralada Cantàbrica
Tectonics (Geology)
Structural geology
Oligocene
Miocene
Cantabrian Mountains
topic Tectònica
Geologia estructural
Oligocè
Miocè
Serralada Cantàbrica
Tectonics (Geology)
Structural geology
Oligocene
Miocene
Cantabrian Mountains
description The As Pontes basin (12 km2), NW Iberian Peninsula, is bounded by a double restraining bend of a dextral strike-slip fault, which is related to the western onshore end of the Pyrenean belt. Surface and subsurface data obtained from intensive coal exploration and mining in the basin since the 1960s together with additional structural and stratigraphic sequence analysis allowed us to determine the geometric relationships between tectonic structures and stratigraphic markers. The small size of the basin and the large amount of quality data make the As Pontes basin a unique natural laboratory for improving our understanding of the origin and evolution of restraining bends. The double restraining bend is the end stage of the structural evolution of a compressive underlapping stepover, where the basin was formed. During the first stage (stepover stage), which began ca. 30 Ma ago (latest Rupelian) and lasted 3.4 My, two small isolated basins bounded by thrusts and normal faults were formed. For 1.3 My, the strike-slip faults, which defined the stepover, grew towards each other until joining and forming the double restraining bend, which bounds one large As Pontes basin (transition stage). The history of the basin was controlled by the activity of the double restraining bend for a further 3.4 My (restraining bend stage) and ended in mid-Aquitanian times (ca. 22 Ma).
publishDate 2005
dc.date.none.fl_str_mv 2005
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/16894
url https://hdl.handle.net/2445/16894
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a http://dx.doi.org/10.1344/105.000001393
Geologica Acta, 2005, vol. 3, núm. 3, p. 225-239
http://dx.doi.org/10.1344/105.000001393
dc.rights.none.fl_str_mv cc by-sa (c) Santanach et al., 2005
http://creativecommons.org/licenses/by-sa/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc by-sa (c) Santanach et al., 2005
http://creativecommons.org/licenses/by-sa/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universitat de Barcelona (UB). Institut de Ciències de la Terra Jaume Almera (ICTJA). Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDEA). Universitat Autonònoma de Barcelona (UAB). Consejo Superior de Investigaciones Científicas (CSIC)
publisher.none.fl_str_mv Universitat de Barcelona (UB). Institut de Ciències de la Terra Jaume Almera (ICTJA). Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDEA). Universitat Autonònoma de Barcelona (UAB). Consejo Superior de Investigaciones Científicas (CSIC)
dc.source.none.fl_str_mv Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869420416820314113
score 15.228081

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