Ciclos climáticos en un sistema lacustre marginal perenne carbonato-evaporítico ( Formación Deza, Eoceno superior, Cuenca de Almazán)

The Deza Formation shows a singular succession in a southern outcrop between Cihuela and Embid. The lower two thirds of the unit are characterised by the abundance of carbonate lacustrine facies alternating with carbonate palustrine ones rich in calcite pseudomorphs after microcrystalline lenticular...

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Detalles Bibliográficos
Autores: Armenteros, I., Bustillo, Mª Ángeles, Huerta Hurtado, Pedro
Tipo de recurso: otro
Fecha de publicación:2006
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/162022
Acceso en línea:http://hdl.handle.net/10261/162022
Access Level:acceso abierto
Palabra clave:Lacustrine-palustrine
Limestones
Gypsum calcitization
Chert
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spelling Ciclos climáticos en un sistema lacustre marginal perenne carbonato-evaporítico ( Formación Deza, Eoceno superior, Cuenca de Almazán)Armenteros, I.Bustillo, Mª ÁngelesHuerta Hurtado, PedroLacustrine-palustrineLimestonesGypsum calcitizationChertThe Deza Formation shows a singular succession in a southern outcrop between Cihuela and Embid. The lower two thirds of the unit are characterised by the abundance of carbonate lacustrine facies alternating with carbonate palustrine ones rich in calcite pseudomorphs after microcrystalline lenticular gypsum, and the presence of lignite in the lower levels of the unit. These facies are arranged in cycles with variable thickness (from 2 to 8 m) consisting of lacustrine fossiliferous marls/soft limestones alternating with palustrine limestone leveIs and shapes of ancient gypsum. These cycles are probably caused by climatic oscillations between humid and dry conditions represented by exposure facies and interstitial gypsum precipitation. The presence of perennial lacustrine facies in this location next to the carbonate Cretaceous paleorelief might be influenced by the abundance of water from springs on this paleorelief. The upper third of the unit consists of a repetition of carbonate palustrine cye/es with some intercalated calcrete levels at the top of the succession. The replacement of gypsum by calcite might occur both during burial and significantly later during uplift and exposure. The petrographic characteristics of the chert nodules indicate an origin that postdates to the calcitization of gypsum.Proyectos BTE2002-04017-C02-02 y CGL2005-05953-C02-01.Peer reviewedSociedad Geológica de EspañaConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201820182006info:eu-repo/semantics/otherhttp://purl.org/coar/resource_type/c_3248info:eu-repo/semantics/bookParthttp://hdl.handle.net/10261/162022reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)EspañolGeotemasSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1620222026-05-22T06:33:51Z
dc.title.none.fl_str_mv Ciclos climáticos en un sistema lacustre marginal perenne carbonato-evaporítico ( Formación Deza, Eoceno superior, Cuenca de Almazán)
title Ciclos climáticos en un sistema lacustre marginal perenne carbonato-evaporítico ( Formación Deza, Eoceno superior, Cuenca de Almazán)
spellingShingle Ciclos climáticos en un sistema lacustre marginal perenne carbonato-evaporítico ( Formación Deza, Eoceno superior, Cuenca de Almazán)
Armenteros, I.
Lacustrine-palustrine
Limestones
Gypsum calcitization
Chert
title_short Ciclos climáticos en un sistema lacustre marginal perenne carbonato-evaporítico ( Formación Deza, Eoceno superior, Cuenca de Almazán)
title_full Ciclos climáticos en un sistema lacustre marginal perenne carbonato-evaporítico ( Formación Deza, Eoceno superior, Cuenca de Almazán)
title_fullStr Ciclos climáticos en un sistema lacustre marginal perenne carbonato-evaporítico ( Formación Deza, Eoceno superior, Cuenca de Almazán)
title_full_unstemmed Ciclos climáticos en un sistema lacustre marginal perenne carbonato-evaporítico ( Formación Deza, Eoceno superior, Cuenca de Almazán)
title_sort Ciclos climáticos en un sistema lacustre marginal perenne carbonato-evaporítico ( Formación Deza, Eoceno superior, Cuenca de Almazán)
dc.creator.none.fl_str_mv Armenteros, I.
Bustillo, Mª Ángeles
Huerta Hurtado, Pedro
author Armenteros, I.
author_facet Armenteros, I.
Bustillo, Mª Ángeles
Huerta Hurtado, Pedro
author_role author
author2 Bustillo, Mª Ángeles
Huerta Hurtado, Pedro
author2_role author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Lacustrine-palustrine
Limestones
Gypsum calcitization
Chert
topic Lacustrine-palustrine
Limestones
Gypsum calcitization
Chert
description The Deza Formation shows a singular succession in a southern outcrop between Cihuela and Embid. The lower two thirds of the unit are characterised by the abundance of carbonate lacustrine facies alternating with carbonate palustrine ones rich in calcite pseudomorphs after microcrystalline lenticular gypsum, and the presence of lignite in the lower levels of the unit. These facies are arranged in cycles with variable thickness (from 2 to 8 m) consisting of lacustrine fossiliferous marls/soft limestones alternating with palustrine limestone leveIs and shapes of ancient gypsum. These cycles are probably caused by climatic oscillations between humid and dry conditions represented by exposure facies and interstitial gypsum precipitation. The presence of perennial lacustrine facies in this location next to the carbonate Cretaceous paleorelief might be influenced by the abundance of water from springs on this paleorelief. The upper third of the unit consists of a repetition of carbonate palustrine cye/es with some intercalated calcrete levels at the top of the succession. The replacement of gypsum by calcite might occur both during burial and significantly later during uplift and exposure. The petrographic characteristics of the chert nodules indicate an origin that postdates to the calcitization of gypsum.
publishDate 2006
dc.date.none.fl_str_mv 2006
2018
2018
dc.type.none.fl_str_mv info:eu-repo/semantics/other
http://purl.org/coar/resource_type/c_3248
dc.type.openaire.fl_str_mv info:eu-repo/semantics/bookPart
format other
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/162022
url http://hdl.handle.net/10261/162022
dc.language.none.fl_str_mv Español
language_invalid_str_mv Español
dc.relation.none.fl_str_mv Geotemas
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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: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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