Crustal structure from gravity signatures in the Iberian Peninsula

Through two-dimensional fi ltering and spectral analysis of gravity data, we infer the density structure of the Iberia Peninsula’s lithosphere (western Europe). The gravity anomaly map of the Iberian Peninsula displays long-wavelength anomaly minima related to Alpine ranges. These anomalies are prim...

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Detalles Bibliográficos
Autores: Gómez Ortiz, David, Agarwal, B. N. P., Tejero López, Rosa María, Ruiz Pérez, Javier
Tipo de recurso: artículo
Fecha de publicación:2011
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/44739
Acceso en línea:https://hdl.handle.net/20.500.14352/44739
Access Level:acceso abierto
Palabra clave:551.24(460)
Gravity data
Crustal structure
Iberian Peninsula
Geodinámica
2507 Geofísica
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spelling Crustal structure from gravity signatures in the Iberian PeninsulaGómez Ortiz, DavidAgarwal, B. N. P.Tejero López, Rosa MaríaRuiz Pérez, Javier551.24(460)Gravity dataCrustal structureIberian PeninsulaGeodinámica2507 GeofísicaThrough two-dimensional fi ltering and spectral analysis of gravity data, we infer the density structure of the Iberia Peninsula’s lithosphere (western Europe). The gravity anomaly map of the Iberian Peninsula displays long-wavelength anomaly minima related to Alpine ranges. These anomalies are primarily linked to a greater crustal thickness. Low-pass filtering of the anomaly map using a cutoff wavelength of 150 km was adequate for effective separation of shallow and deep sources used for computing the three-dimensional (3-D) Moho interface. Tsuboi’s technique (identical to the equivalent stratum theorem) is used here to map the 3-D Moho interface by selecting mean source depths from the results of the spectral analysis, and assuming a homogeneous density contrast of 350 kg/m3. The most characteristic feature of the 3-D Moho geometry was the presence of several lows associated with mountain ranges created by Alpine tectonics. In those areas, the gravity-derived Moho reaches a depth of up to 45 km in the Pyrenees and Cantabrian Mountains and close to 40 km under the betics, Central System, and Iberian Chain. Under the Iberian Massif, the western part of the Iberian Peninsula composed of a Variscan basement, the Moho was located at a depth of 30–36 km. These results are consistent with existing seismic data and indicate that gravity-based techniques can provide very good estimates of lithosphere structure.Geological Society of AmericaUniversidad Complutense de Madrid20112011-01-0120112011-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/44739reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/447392026-06-02T12:44:21Z
dc.title.none.fl_str_mv Crustal structure from gravity signatures in the Iberian Peninsula
title Crustal structure from gravity signatures in the Iberian Peninsula
spellingShingle Crustal structure from gravity signatures in the Iberian Peninsula
Gómez Ortiz, David
551.24(460)
Gravity data
Crustal structure
Iberian Peninsula
Geodinámica
2507 Geofísica
title_short Crustal structure from gravity signatures in the Iberian Peninsula
title_full Crustal structure from gravity signatures in the Iberian Peninsula
title_fullStr Crustal structure from gravity signatures in the Iberian Peninsula
title_full_unstemmed Crustal structure from gravity signatures in the Iberian Peninsula
title_sort Crustal structure from gravity signatures in the Iberian Peninsula
dc.creator.none.fl_str_mv Gómez Ortiz, David
Agarwal, B. N. P.
Tejero López, Rosa María
Ruiz Pérez, Javier
author Gómez Ortiz, David
author_facet Gómez Ortiz, David
Agarwal, B. N. P.
Tejero López, Rosa María
Ruiz Pérez, Javier
author_role author
author2 Agarwal, B. N. P.
Tejero López, Rosa María
Ruiz Pérez, Javier
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 551.24(460)
Gravity data
Crustal structure
Iberian Peninsula
Geodinámica
2507 Geofísica
topic 551.24(460)
Gravity data
Crustal structure
Iberian Peninsula
Geodinámica
2507 Geofísica
description Through two-dimensional fi ltering and spectral analysis of gravity data, we infer the density structure of the Iberia Peninsula’s lithosphere (western Europe). The gravity anomaly map of the Iberian Peninsula displays long-wavelength anomaly minima related to Alpine ranges. These anomalies are primarily linked to a greater crustal thickness. Low-pass filtering of the anomaly map using a cutoff wavelength of 150 km was adequate for effective separation of shallow and deep sources used for computing the three-dimensional (3-D) Moho interface. Tsuboi’s technique (identical to the equivalent stratum theorem) is used here to map the 3-D Moho interface by selecting mean source depths from the results of the spectral analysis, and assuming a homogeneous density contrast of 350 kg/m3. The most characteristic feature of the 3-D Moho geometry was the presence of several lows associated with mountain ranges created by Alpine tectonics. In those areas, the gravity-derived Moho reaches a depth of up to 45 km in the Pyrenees and Cantabrian Mountains and close to 40 km under the betics, Central System, and Iberian Chain. Under the Iberian Massif, the western part of the Iberian Peninsula composed of a Variscan basement, the Moho was located at a depth of 30–36 km. These results are consistent with existing seismic data and indicate that gravity-based techniques can provide very good estimates of lithosphere structure.
publishDate 2011
dc.date.none.fl_str_mv 2011
2011-01-01
2011
2011-01-01
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 https://hdl.handle.net/20.500.14352/44739
url https://hdl.handle.net/20.500.14352/44739
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
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Geological Society of America
publisher.none.fl_str_mv Geological Society of America
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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