Three-dimensional crustal structure of the Vøring Margin (NE Atlantic): A combined seismic and gravity image

The three-dimensional (3-D) crustal structure of the Vøring Margin is investigated by integrating results from reflection and wide-angle seismic data, well log data, and 3-D gravity modeling. The reduced "crustal" Bouguer anomaly, obtained after computing the gravity effects of the water l...

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Autores: Torné, Montserrat, Fernández Ortiga, Manel, Wheeler, W., Karpuz, R.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2003
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/237804
Acceso en línea:http://hdl.handle.net/10261/237804
Access Level:acceso abierto
Palabra clave:Volcanic margin
underplating
Bouguer anomaly
Crustal structure
Norway
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spelling Three-dimensional crustal structure of the Vøring Margin (NE Atlantic): A combined seismic and gravity imageTorné, MontserratFernández Ortiga, ManelWheeler, W.Karpuz, R.Volcanic marginunderplatingBouguer anomalyCrustal structureNorwayThe three-dimensional (3-D) crustal structure of the Vøring Margin is investigated by integrating results from reflection and wide-angle seismic data, well log data, and 3-D gravity modeling. The reduced "crustal" Bouguer anomaly, obtained after computing the gravity effects of the water layer and Cenozoic and Cretaceous sedimentary cover, displays an arcuate-shaped gravity high that coincides with the Cretaceous subbasins. The Pre-Cretaceous layer varies in thickness from 7 to 8 km below the Vøring Marginal High to <2 km in the Mesozoic depocenters and is overlying a relative "high-density" upper-middle crust (2850 kg m-3). Underlying the upper-middle crust, there is a "high-velocity/density" body, which is imaged along the Marginal High and western region of the Vøring Basin. The High Velocity Body shallows to <14 km depth in the western end of the Marginal High and thins out toward the eastern and southeastern regions of the basin. Regions of thick crust (∼24 km) are located in the eastern and southern parts of the basin and northern and central parts of the Marginal High, whereas thinner crust is observed at the southwest region of the study area (∼16 km) and in the Fenris Graben region and Utgard High (∼18 km). Residual gravity anomalies are related to the distribution of interbedded volcanics and to the presence of sedimentary subbasins under the Marginal High. Crustal thinning is not directly related to thickening of the HVB and/or the location of Cretaceous depocentres, indicating a major rejuvenation of the Cretaceous Moho related to the Maastritchian-Paleocene rifting episode and massive emplacement of igneous material during breakup.This research has benefitted from a collaborative project between Norsk Hydro Oil Division and the Institute of Earth Sciences (ICTJACSIC).American Geophysical UnionNorsk HydroConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2021202120032021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/237804reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1029/2002JB001838Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2378042026-05-22T06:33:51Z
dc.title.none.fl_str_mv Three-dimensional crustal structure of the Vøring Margin (NE Atlantic): A combined seismic and gravity image
title Three-dimensional crustal structure of the Vøring Margin (NE Atlantic): A combined seismic and gravity image
spellingShingle Three-dimensional crustal structure of the Vøring Margin (NE Atlantic): A combined seismic and gravity image
Torné, Montserrat
Volcanic margin
underplating
Bouguer anomaly
Crustal structure
Norway
title_short Three-dimensional crustal structure of the Vøring Margin (NE Atlantic): A combined seismic and gravity image
title_full Three-dimensional crustal structure of the Vøring Margin (NE Atlantic): A combined seismic and gravity image
title_fullStr Three-dimensional crustal structure of the Vøring Margin (NE Atlantic): A combined seismic and gravity image
title_full_unstemmed Three-dimensional crustal structure of the Vøring Margin (NE Atlantic): A combined seismic and gravity image
title_sort Three-dimensional crustal structure of the Vøring Margin (NE Atlantic): A combined seismic and gravity image
dc.creator.none.fl_str_mv Torné, Montserrat
Fernández Ortiga, Manel
Wheeler, W.
Karpuz, R.
author Torné, Montserrat
author_facet Torné, Montserrat
Fernández Ortiga, Manel
Wheeler, W.
Karpuz, R.
author_role author
author2 Fernández Ortiga, Manel
Wheeler, W.
Karpuz, R.
author2_role author
author
author
dc.contributor.none.fl_str_mv Norsk Hydro
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Volcanic margin
underplating
Bouguer anomaly
Crustal structure
Norway
topic Volcanic margin
underplating
Bouguer anomaly
Crustal structure
Norway
description The three-dimensional (3-D) crustal structure of the Vøring Margin is investigated by integrating results from reflection and wide-angle seismic data, well log data, and 3-D gravity modeling. The reduced "crustal" Bouguer anomaly, obtained after computing the gravity effects of the water layer and Cenozoic and Cretaceous sedimentary cover, displays an arcuate-shaped gravity high that coincides with the Cretaceous subbasins. The Pre-Cretaceous layer varies in thickness from 7 to 8 km below the Vøring Marginal High to <2 km in the Mesozoic depocenters and is overlying a relative "high-density" upper-middle crust (2850 kg m-3). Underlying the upper-middle crust, there is a "high-velocity/density" body, which is imaged along the Marginal High and western region of the Vøring Basin. The High Velocity Body shallows to <14 km depth in the western end of the Marginal High and thins out toward the eastern and southeastern regions of the basin. Regions of thick crust (∼24 km) are located in the eastern and southern parts of the basin and northern and central parts of the Marginal High, whereas thinner crust is observed at the southwest region of the study area (∼16 km) and in the Fenris Graben region and Utgard High (∼18 km). Residual gravity anomalies are related to the distribution of interbedded volcanics and to the presence of sedimentary subbasins under the Marginal High. Crustal thinning is not directly related to thickening of the HVB and/or the location of Cretaceous depocentres, indicating a major rejuvenation of the Cretaceous Moho related to the Maastritchian-Paleocene rifting episode and massive emplacement of igneous material during breakup.
publishDate 2003
dc.date.none.fl_str_mv 2003
2021
2021
2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/237804
url http://hdl.handle.net/10261/237804
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1029/2002JB001838
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Geophysical Union
publisher.none.fl_str_mv American Geophysical Union
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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score 15.811543

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