Significado paleoambiental de las calcretas terciarias de la Fosa de Teruel. Microestructura e isótopos estables.

Laminar and nodular calcretes in the Teruel Graben are from Palaeogene to Pleistocene in age. These calcretes developed under the influence of the same source rocks and groundwaters, so differences in their microstructure and isotope composition must be related to differences in host rock, climate,...

Descripción completa

Detalles Bibliográficos
Autores: Alonso Zarza, Ana María, Arenas Sevillano, Cristian Bernabé
Tipo de recurso: artículo
Fecha de publicación:2003
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:español
OAI Identifier:oai:docta.ucm.es:20.500.14352/52560
Acceso en línea:https://hdl.handle.net/20.500.14352/52560
Access Level:acceso abierto
Palabra clave:550.34
Calcretes
Microcodium
Cenozoic
Teruel Graben
Stable Isotopes
Geoquímica
2503 Geoquímica
id ES_877fcf0dcb7f8b80b41da92fff0a23ac
oai_identifier_str oai:docta.ucm.es:20.500.14352/52560
network_acronym_str ES
network_name_str España
repository_id_str
spelling Significado paleoambiental de las calcretas terciarias de la Fosa de Teruel. Microestructura e isótopos estables.Alonso Zarza, Ana MaríaArenas Sevillano, Cristian Bernabé550.34CalcretesMicrocodiumCenozoicTeruel GrabenStable IsotopesGeoquímica2503 GeoquímicaLaminar and nodular calcretes in the Teruel Graben are from Palaeogene to Pleistocene in age. These calcretes developed under the influence of the same source rocks and groundwaters, so differences in their microstructure and isotope composition must be related to differences in host rock, climate, vegetation and time of development. The laminar calcretes formed on hard substrates or on coarse detrital deposits. Alveolar septal structures, root tubes, calcified organic filaments and root cells are common. Underside coatings and fibrous vadose cements occur around gravel clasts. Spherulites formed in association with bacterial mats in ponded waters that dried out, and are preserved only at the top of the youngest calcretes. Nodular calcretes developed on fine detrital substrates. The nodules consist of micrite and show desiccation cracks and mottling, micritic coatings, alveolar septal structures and root traces. Microcodium occurs only in calcretes of Palaeogene age. The stable isotope composition covers a wide range: -8.23 <δ180<-4.29 ‰ PDB and -7.29<δ13C<-3.42 ‰ PDB. These calcretes formed under semi-arid conditions with prevailing C3 vegetation. No clear shift in δ13C values, which might indicate an increase of C4 vegetation, was found during the Miocene or the transit to the Pliocene.Sociedad Geológica de España.Universidad Complutense de Madrid20032003-01-0120032003-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/52560reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Españolspaopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/525602026-06-02T12:44:21Z
dc.title.none.fl_str_mv Significado paleoambiental de las calcretas terciarias de la Fosa de Teruel. Microestructura e isótopos estables.
title Significado paleoambiental de las calcretas terciarias de la Fosa de Teruel. Microestructura e isótopos estables.
spellingShingle Significado paleoambiental de las calcretas terciarias de la Fosa de Teruel. Microestructura e isótopos estables.
Alonso Zarza, Ana María
550.34
Calcretes
Microcodium
Cenozoic
Teruel Graben
Stable Isotopes
Geoquímica
2503 Geoquímica
title_short Significado paleoambiental de las calcretas terciarias de la Fosa de Teruel. Microestructura e isótopos estables.
title_full Significado paleoambiental de las calcretas terciarias de la Fosa de Teruel. Microestructura e isótopos estables.
title_fullStr Significado paleoambiental de las calcretas terciarias de la Fosa de Teruel. Microestructura e isótopos estables.
title_full_unstemmed Significado paleoambiental de las calcretas terciarias de la Fosa de Teruel. Microestructura e isótopos estables.
title_sort Significado paleoambiental de las calcretas terciarias de la Fosa de Teruel. Microestructura e isótopos estables.
dc.creator.none.fl_str_mv Alonso Zarza, Ana María
Arenas Sevillano, Cristian Bernabé
author Alonso Zarza, Ana María
author_facet Alonso Zarza, Ana María
Arenas Sevillano, Cristian Bernabé
author_role author
author2 Arenas Sevillano, Cristian Bernabé
author2_role author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 550.34
Calcretes
Microcodium
Cenozoic
Teruel Graben
Stable Isotopes
Geoquímica
2503 Geoquímica
topic 550.34
Calcretes
Microcodium
Cenozoic
Teruel Graben
Stable Isotopes
Geoquímica
2503 Geoquímica
description Laminar and nodular calcretes in the Teruel Graben are from Palaeogene to Pleistocene in age. These calcretes developed under the influence of the same source rocks and groundwaters, so differences in their microstructure and isotope composition must be related to differences in host rock, climate, vegetation and time of development. The laminar calcretes formed on hard substrates or on coarse detrital deposits. Alveolar septal structures, root tubes, calcified organic filaments and root cells are common. Underside coatings and fibrous vadose cements occur around gravel clasts. Spherulites formed in association with bacterial mats in ponded waters that dried out, and are preserved only at the top of the youngest calcretes. Nodular calcretes developed on fine detrital substrates. The nodules consist of micrite and show desiccation cracks and mottling, micritic coatings, alveolar septal structures and root traces. Microcodium occurs only in calcretes of Palaeogene age. The stable isotope composition covers a wide range: -8.23 <δ180<-4.29 ‰ PDB and -7.29<δ13C<-3.42 ‰ PDB. These calcretes formed under semi-arid conditions with prevailing C3 vegetation. No clear shift in δ13C values, which might indicate an increase of C4 vegetation, was found during the Miocene or the transit to the Pliocene.
publishDate 2003
dc.date.none.fl_str_mv 2003
2003-01-01
2003
2003-01-01
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/20.500.14352/52560
url https://hdl.handle.net/20.500.14352/52560
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_ 1869412466392301568
score 15,301603

Similares en LA Referencia