Datos geofísicos y evolución sedimentaria de la Depresión de la Janda (Cádiz)

La Janda lake is located into a tectonic graben filled by Pleistocene and Holocene f1uvio-marine sediments. Geophysical survey consisting on Electric-Iogs and seismic refraction profiles aimed to determining the thickness of Quaternary sediments infilling the graben. Nevertheless, the results are si...

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Detalhes bibliográficos
Autores: Luque, Luis de, Silva Barroso, Pablo Gabriel, Zazo Cardeña, Caridad, Recio, J.M., Carrasco, P., Goy Goy, José Luis, Dueñas, M.I., Lario, Javier, Dabrio González, Cristino José, González Hernández, F.M., Poza, L.
Formato: artículo
Fecha de publicación:2001
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:español
OAI Identifier:oai:docta.ucm.es:20.500.14352/56872
Acesso em linha:https://hdl.handle.net/20.500.14352/56872
Access Level:acceso abierto
Palavra-chave:550.3(460.35)
551.3.051(460.35)
La Janda Graben
Geophysical data
Quaternary sedimentation
Geología estratigráfica
2506.19 Estratigrafía
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oai_identifier_str oai:docta.ucm.es:20.500.14352/56872
network_acronym_str ES
network_name_str España
repository_id_str
spelling Datos geofísicos y evolución sedimentaria de la Depresión de la Janda (Cádiz)Luque, Luis deSilva Barroso, Pablo GabrielZazo Cardeña, CaridadRecio, J.M.Carrasco, P.Goy Goy, José LuisDueñas, M.I.Lario, JavierDabrio González, Cristino JoséGonzález Hernández, F.M.Poza, L.550.3(460.35)551.3.051(460.35)La Janda GrabenGeophysical dataQuaternary sedimentationGeología estratigráfica2506.19 EstratigrafíaLa Janda lake is located into a tectonic graben filled by Pleistocene and Holocene f1uvio-marine sediments. Geophysical survey consisting on Electric-Iogs and seismic refraction profiles aimed to determining the thickness of Quaternary sediments infilling the graben. Nevertheless, the results are significantly distorted by a saline aquifer that occupies most of the sedimentary filling. In any case it is possible to identify an assymetric subsident area reaching up to 300 m depth, characterised by very low apparent resistivities (1.5-2.4 W/m). This thick geoelectrical unit can be preliminary subdivided into 3 different subunits here called A, B 1, B2, characterised by resistivity differences. The shallow 4-6 m thick Unit A consists of a thin lacustrine and alluvial e/ay and silts of Holocene age easily recognized in seismic refraction profiles and drill cores. Unit B can be separated in two subunits; Both are saturated in brackish or saline waters; B1 is a 20-40 m thick unit that thins northward and correspond to the Plio-Pleistocene, B2 is a slightly more resistive unit that extends from this depth to 352 m and corresponds to deeply weathered mio-pliocene sandstones. The upper part of Sub-unit B1 correspond to estuarine sands recorded in a previous core which deposition finishes at ca. 3810 cal BP. A sharp normal fault limits the southern part of La Janda assymetric graben.Sociedad Geológica de EspañaUniversidad Complutense de Madrid20012001-01-0120012001-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/56872reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Españolspaopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/568722026-06-02T12:44:21Z
dc.title.none.fl_str_mv Datos geofísicos y evolución sedimentaria de la Depresión de la Janda (Cádiz)
title Datos geofísicos y evolución sedimentaria de la Depresión de la Janda (Cádiz)
spellingShingle Datos geofísicos y evolución sedimentaria de la Depresión de la Janda (Cádiz)
Luque, Luis de
550.3(460.35)
551.3.051(460.35)
La Janda Graben
Geophysical data
Quaternary sedimentation
Geología estratigráfica
2506.19 Estratigrafía
title_short Datos geofísicos y evolución sedimentaria de la Depresión de la Janda (Cádiz)
title_full Datos geofísicos y evolución sedimentaria de la Depresión de la Janda (Cádiz)
title_fullStr Datos geofísicos y evolución sedimentaria de la Depresión de la Janda (Cádiz)
title_full_unstemmed Datos geofísicos y evolución sedimentaria de la Depresión de la Janda (Cádiz)
title_sort Datos geofísicos y evolución sedimentaria de la Depresión de la Janda (Cádiz)
dc.creator.none.fl_str_mv Luque, Luis de
Silva Barroso, Pablo Gabriel
Zazo Cardeña, Caridad
Recio, J.M.
Carrasco, P.
Goy Goy, José Luis
Dueñas, M.I.
Lario, Javier
Dabrio González, Cristino José
González Hernández, F.M.
Poza, L.
author Luque, Luis de
author_facet Luque, Luis de
Silva Barroso, Pablo Gabriel
Zazo Cardeña, Caridad
Recio, J.M.
Carrasco, P.
Goy Goy, José Luis
Dueñas, M.I.
Lario, Javier
Dabrio González, Cristino José
González Hernández, F.M.
Poza, L.
author_role author
author2 Silva Barroso, Pablo Gabriel
Zazo Cardeña, Caridad
Recio, J.M.
Carrasco, P.
Goy Goy, José Luis
Dueñas, M.I.
Lario, Javier
Dabrio González, Cristino José
González Hernández, F.M.
Poza, L.
author2_role author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 550.3(460.35)
551.3.051(460.35)
La Janda Graben
Geophysical data
Quaternary sedimentation
Geología estratigráfica
2506.19 Estratigrafía
topic 550.3(460.35)
551.3.051(460.35)
La Janda Graben
Geophysical data
Quaternary sedimentation
Geología estratigráfica
2506.19 Estratigrafía
description La Janda lake is located into a tectonic graben filled by Pleistocene and Holocene f1uvio-marine sediments. Geophysical survey consisting on Electric-Iogs and seismic refraction profiles aimed to determining the thickness of Quaternary sediments infilling the graben. Nevertheless, the results are significantly distorted by a saline aquifer that occupies most of the sedimentary filling. In any case it is possible to identify an assymetric subsident area reaching up to 300 m depth, characterised by very low apparent resistivities (1.5-2.4 W/m). This thick geoelectrical unit can be preliminary subdivided into 3 different subunits here called A, B 1, B2, characterised by resistivity differences. The shallow 4-6 m thick Unit A consists of a thin lacustrine and alluvial e/ay and silts of Holocene age easily recognized in seismic refraction profiles and drill cores. Unit B can be separated in two subunits; Both are saturated in brackish or saline waters; B1 is a 20-40 m thick unit that thins northward and correspond to the Plio-Pleistocene, B2 is a slightly more resistive unit that extends from this depth to 352 m and corresponds to deeply weathered mio-pliocene sandstones. The upper part of Sub-unit B1 correspond to estuarine sands recorded in a previous core which deposition finishes at ca. 3810 cal BP. A sharp normal fault limits the southern part of La Janda assymetric graben.
publishDate 2001
dc.date.none.fl_str_mv 2001
2001-01-01
2001
2001-01-01
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/20.500.14352/56872
url https://hdl.handle.net/20.500.14352/56872
dc.language.none.fl_str_mv Español
spa
language_invalid_str_mv Español
language spa
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 Sociedad Geológica de España
publisher.none.fl_str_mv Sociedad Geológica de España
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
_version_ 1869409549848412160
score 15,301603

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