Evidence for Late Messinian seismites, Nijar Basin, south-east Spain

The Feos Formation of the Nijar Basin comprises sediments deposited during the final stage of the Messinian salinity crisis when the Mediterranean was almost totally isolated. Levels of soft-sediment deformation structures occur in both conglomeratic alluvial sediments deposited close to faults and...

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Detalles Bibliográficos
Autores: Fortuin, A.R., Dabrio González, Cristino José
Tipo de recurso: artículo
Fecha de publicación:2008
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/49362
Acceso en línea:https://hdl.handle.net/20.500.14352/49362
Access Level:acceso abierto
Palabra clave:551.7
Lago Mare
Liquefaction structures
Messinian
Nijar Basin
Palaeoseismology
Seismites
Soft-sediment deformation.
Geología estratigráfica
2506.19 Estratigrafía
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oai_identifier_str oai:docta.ucm.es:20.500.14352/49362
network_acronym_str ES
network_name_str España
repository_id_str
spelling Evidence for Late Messinian seismites, Nijar Basin, south-east SpainFortuin, A.R.Dabrio González, Cristino José551.7Lago MareLiquefaction structuresMessinianNijar BasinPalaeoseismologySeismitesSoft-sediment deformation.Geología estratigráfica2506.19 EstratigrafíaThe Feos Formation of the Nijar Basin comprises sediments deposited during the final stage of the Messinian salinity crisis when the Mediterranean was almost totally isolated. Levels of soft-sediment deformation structures occur in both conglomeratic alluvial sediments deposited close to faults and the hyposaline Lago Mare facies, a laminated and thin-bedded succession of whitish chalky marls and intercalated sands alternating with non-marine coastal plain deposits. Deformation structures in the coarse clastics include funnel-shaped depressions filled with conglomerate, liquefaction dykes terminating downwards in gravel pockets, soft-sediment mixing bodies, chaotic intervals and flame structures. Evidence for soft-sediment deformation in the fine-grained Lago Mare facies comprises syndepositional faulting and fault-grading, sandstone dykes, mixed layers, slumping and sliding of sandstone beds, convolute bedding, and pillar and flame structures. The soft-sediment deformed intervals resemble those ascribed elsewhere to seismic shaking. Moreover, the study area provides the appropriate conditions for the preservation of deformation structures induced by seismicity; such as location in a tectonically active area, variable sediment input to produce heterolithic deposits and an absence of bioturbation. The vertical distribution of soft-sediment deformation implies frequent seismic shocks, underlining the importance of seismicity in the Betic region during the Late Messinian when the Nijar Basin became separated from the Sorbas Basin to the north. The presence of liquefied gravel injections in the marginal facies indicates strong earthquakes (M≥7). The identification of at least four separate fissured levels within a single Lago Mare interval suggests a recurrence interval for large magnitude earthquakes of the order of millennia, assuming that the cyclicity of the alternating Lago Mare and continental intervals was precession-controlled. This suggestion is consistent with the present-day seismic activity in SE Spain.Blackwell Publishing LtdUniversidad Complutense de Madrid20082008-01-0120082008-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/49362reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/493622026-06-02T12:44:21Z
dc.title.none.fl_str_mv Evidence for Late Messinian seismites, Nijar Basin, south-east Spain
title Evidence for Late Messinian seismites, Nijar Basin, south-east Spain
spellingShingle Evidence for Late Messinian seismites, Nijar Basin, south-east Spain
Fortuin, A.R.
551.7
Lago Mare
Liquefaction structures
Messinian
Nijar Basin
Palaeoseismology
Seismites
Soft-sediment deformation.
Geología estratigráfica
2506.19 Estratigrafía
title_short Evidence for Late Messinian seismites, Nijar Basin, south-east Spain
title_full Evidence for Late Messinian seismites, Nijar Basin, south-east Spain
title_fullStr Evidence for Late Messinian seismites, Nijar Basin, south-east Spain
title_full_unstemmed Evidence for Late Messinian seismites, Nijar Basin, south-east Spain
title_sort Evidence for Late Messinian seismites, Nijar Basin, south-east Spain
dc.creator.none.fl_str_mv Fortuin, A.R.
Dabrio González, Cristino José
author Fortuin, A.R.
author_facet Fortuin, A.R.
Dabrio González, Cristino José
author_role author
author2 Dabrio González, Cristino José
author2_role author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 551.7
Lago Mare
Liquefaction structures
Messinian
Nijar Basin
Palaeoseismology
Seismites
Soft-sediment deformation.
Geología estratigráfica
2506.19 Estratigrafía
topic 551.7
Lago Mare
Liquefaction structures
Messinian
Nijar Basin
Palaeoseismology
Seismites
Soft-sediment deformation.
Geología estratigráfica
2506.19 Estratigrafía
description The Feos Formation of the Nijar Basin comprises sediments deposited during the final stage of the Messinian salinity crisis when the Mediterranean was almost totally isolated. Levels of soft-sediment deformation structures occur in both conglomeratic alluvial sediments deposited close to faults and the hyposaline Lago Mare facies, a laminated and thin-bedded succession of whitish chalky marls and intercalated sands alternating with non-marine coastal plain deposits. Deformation structures in the coarse clastics include funnel-shaped depressions filled with conglomerate, liquefaction dykes terminating downwards in gravel pockets, soft-sediment mixing bodies, chaotic intervals and flame structures. Evidence for soft-sediment deformation in the fine-grained Lago Mare facies comprises syndepositional faulting and fault-grading, sandstone dykes, mixed layers, slumping and sliding of sandstone beds, convolute bedding, and pillar and flame structures. The soft-sediment deformed intervals resemble those ascribed elsewhere to seismic shaking. Moreover, the study area provides the appropriate conditions for the preservation of deformation structures induced by seismicity; such as location in a tectonically active area, variable sediment input to produce heterolithic deposits and an absence of bioturbation. The vertical distribution of soft-sediment deformation implies frequent seismic shocks, underlining the importance of seismicity in the Betic region during the Late Messinian when the Nijar Basin became separated from the Sorbas Basin to the north. The presence of liquefied gravel injections in the marginal facies indicates strong earthquakes (M≥7). The identification of at least four separate fissured levels within a single Lago Mare interval suggests a recurrence interval for large magnitude earthquakes of the order of millennia, assuming that the cyclicity of the alternating Lago Mare and continental intervals was precession-controlled. This suggestion is consistent with the present-day seismic activity in SE Spain.
publishDate 2008
dc.date.none.fl_str_mv 2008
2008-01-01
2008
2008-01-01
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/20.500.14352/49362
url https://hdl.handle.net/20.500.14352/49362
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 Blackwell Publishing Ltd
publisher.none.fl_str_mv Blackwell Publishing Ltd
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_ 1869415415718871040
score 15,300724

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