Challenges to carbonate-evaporite peritidal facies models and cycles: Insights from Lower Cretaceous stromatolite-bearing deposits (Oncala Group, N Spain)

Quijada, I. Emma; Benito Moreno, María Isabel; Suárez González, Pablo; Rodríguez Martínez, Marta; Campos Soto, Sonia

Challenges to carbonate-evaporite peritidal facies models and cycles: Insights from Lower Cretaceous stromatolite-bearing deposits (Oncala Group, N Spain)

Peritidal carbonate-evaporite successions, since they are developed in the transition between continental and marine realms, provide essential keys for palaeobathymetric and palaeoclimatic interpretations. As a result, several facies models have been proposed to assist on the interpretation of ancie...

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Detalles Bibliográficos
Autores:	Quijada, I. Emma, Benito Moreno, María Isabel, Suárez González, Pablo, Rodríguez Martínez, Marta, Campos Soto, Sonia
Tipo de recurso:	artículo
Fecha de publicación:	2020
País:	España
Institución:	Universidad Complutense de Madrid (UCM)
Repositorio:	Docta Complutense
Idioma:	inglés
OAI Identifier:	oai:docta.ucm.es:20.500.14352/6713
Acceso en línea:	https://hdl.handle.net/20.500.14352/6713
Access Level:	acceso abierto
Palabra clave:	551.351 Tidal flat Coastal sabkha Microbialites Anhydrite nodules Facies mosaic Cameros Basin Geología estratigráfica Petrología 2506.19 Estratigrafía

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network_name_str	España
repository_id_str
dc.title.none.fl_str_mv	Challenges to carbonate-evaporite peritidal facies models and cycles: Insights from Lower Cretaceous stromatolite-bearing deposits (Oncala Group, N Spain)
title	Challenges to carbonate-evaporite peritidal facies models and cycles: Insights from Lower Cretaceous stromatolite-bearing deposits (Oncala Group, N Spain)
spellingShingle	Challenges to carbonate-evaporite peritidal facies models and cycles: Insights from Lower Cretaceous stromatolite-bearing deposits (Oncala Group, N Spain) Quijada, I. Emma 551.351 Tidal flat Coastal sabkha Microbialites Anhydrite nodules Facies mosaic Cameros Basin Geología estratigráfica Petrología 2506.19 Estratigrafía
title_short	Challenges to carbonate-evaporite peritidal facies models and cycles: Insights from Lower Cretaceous stromatolite-bearing deposits (Oncala Group, N Spain)
title_full	Challenges to carbonate-evaporite peritidal facies models and cycles: Insights from Lower Cretaceous stromatolite-bearing deposits (Oncala Group, N Spain)
title_fullStr	Challenges to carbonate-evaporite peritidal facies models and cycles: Insights from Lower Cretaceous stromatolite-bearing deposits (Oncala Group, N Spain)
title_full_unstemmed	Challenges to carbonate-evaporite peritidal facies models and cycles: Insights from Lower Cretaceous stromatolite-bearing deposits (Oncala Group, N Spain)
title_sort	Challenges to carbonate-evaporite peritidal facies models and cycles: Insights from Lower Cretaceous stromatolite-bearing deposits (Oncala Group, N Spain)
dc.creator.none.fl_str_mv	Quijada, I. Emma Benito Moreno, María Isabel Suárez González, Pablo Rodríguez Martínez, Marta Campos Soto, Sonia
author	Quijada, I. Emma
author_facet	Quijada, I. Emma Benito Moreno, María Isabel Suárez González, Pablo Rodríguez Martínez, Marta Campos Soto, Sonia
author_role	author
author2	Benito Moreno, María Isabel Suárez González, Pablo Rodríguez Martínez, Marta Campos Soto, Sonia
author2_role	author author author author
dc.contributor.none.fl_str_mv	Universidad Complutense de Madrid
dc.subject.none.fl_str_mv	551.351 Tidal flat Coastal sabkha Microbialites Anhydrite nodules Facies mosaic Cameros Basin Geología estratigráfica Petrología 2506.19 Estratigrafía
topic	551.351 Tidal flat Coastal sabkha Microbialites Anhydrite nodules Facies mosaic Cameros Basin Geología estratigráfica Petrología 2506.19 Estratigrafía
description	Peritidal carbonate-evaporite successions, since they are developed in the transition between continental and marine realms, provide essential keys for palaeobathymetric and palaeoclimatic interpretations. As a result, several facies models have been proposed to assist on the interpretation of ancient tidal flat deposits, and peritidal successions have been extensively used for cyclicity analyses. In this study, well-exposed, Lower Cretaceous peritidal deposits (Oncala Group, Cameros Basin, N Spain) are analysed and compared with the most commonly-used present-day analogues (from Shark Bay, the Arabian Gulf and the Bahamas) and with ancient peritidal successions, providing their palaeoenvironmental and palaeoclimatic interpretation, assessing the usefulness and limitations of the facies models, and evaluating the suitability of these deposits for analysis of decimetre to metre-scale cycles. The studied peritidal deposits consist of thinly-bedded to laminated dolostones, dolomitic stromatolites, stromatolite breccias, flat-pebble and edgewise breccias, and calcite and quartz pseudomorphs after anhydrite nodules. Abundant resemblances of the peritidal deposits of the Oncala Group with those of Shark Bay, including that they are largely composed of microbialites and intraclasts, makes the peritidal deposits of the Oncala Group one of the best fossil analogues of this present-day setting. However, the presence of anhydrite nodules indicates pervasive evaporite precipitation in the supratidal zone, which is a feature that does not occur in supratidal flats of Shark Bay, but is characteristic of arid sabkhas of the Arabian Gulf. Nevertheless, the fact that carbonate-evaporite tidal flats of the Oncala Group were laterally related with siliciclastic tidal flats with large freshwater input and broadly inhabited by dinosaurs, suggests that anhydrites precipitated under less arid climates than those of the Arabian Gulf nowadays, pointing to semiarid climatic conditions during deposition. Moreover, the fact that peritidal deposits with anhydrite nodules were exclusively formed in a low-subsidence area of the Cameros Basin suggests that the rate of accommodation space creation also played an important role in their development. Regarding the comparison with other fossil peritidal sediments, the studied deposits show more abundant similarities with Proterozoic and Cambrian successions, composed mainly of stromatolites, microbial laminites, and intraclasts, than with other Mesozoic peritidal deposits, in which bioclasts and burrowing are usually more abundant. This highlights the difficulties for assigning specific features to certain geological ages. Finally, peritidal facies of the Oncala Group may change laterally and vertically to any other facies, showing a patchy lateral distribution of facies and an unsystematic vertical stacking pattern. The sedimentary features of the stromatolite, breccia and thinly-bedded to laminated dolostone facies do not allow their assignment to a unique tidal zone. Moreover, sedimentary features indicative of subaerial exposure, such as anhydrite nodules formed in the capillary zone, occur within any of the carbonate facies and show limited lateral extent. This results in a succession that cannot be clearly subdivided into subsequent shallowing-upward cycles not even by using erosive surfaces or the anhydrite nodule layers as marker horizons of the upper part of the cycles, because their limited lateral extent prevents reliable correlations. Similar composite lateral and vertical facies relationships have been documented both in the present-day analogues and in ancient successions, which suggests that this kind of facies relationships may be common in peritidal successions and highlights the caution that must be taken when trying to perform cyclicity analysis on them.
publishDate	2020
dc.date.none.fl_str_mv	2020 2020-01-01 2020 2020-01-01
dc.type.none.fl_str_mv	journal article http://purl.org/coar/resource_type/c_6501 AM http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv	info:eu-repo/semantics/article
format	article
dc.identifier.none.fl_str_mv	https://hdl.handle.net/20.500.14352/6713
url	https://hdl.handle.net/20.500.14352/6713
dc.language.none.fl_str_mv	Inglés eng
language_invalid_str_mv	Inglés
language	eng
dc.relation.none.fl_str_mv	Agencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020 PGC2018-094034-B-C21 SEDIMENTOLOGIA Y PALEONTOLOGIA UNIDAS EN EL ESTUDIO DE LA FORMACION Y CONSERVACION DE FOSILES DE DINOSAURIO (JURA. SUP.-CRETAC. INF.): EXPLORANDO POSIBLES PUENTES TERRESTRES Ministerio de Economía y Competitividad http://dx.doi.org/10.13039/501100003329 Not available CGL2014-52670-P PALEOGEOGRAFIA Y EVOLUCION DE LOS SISTEMAS COSTEROS DEL SE Y NO DE LA CUENCA IBERICA EN EL JURASICO SUP.-CRETACICO INF. Y SU RELACION CON EL REGISTRO DE FOSILES DE DINOSAURIOS
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 application/pdf
dc.publisher.none.fl_str_mv	Elsevier
publisher.none.fl_str_mv	Elsevier
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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spelling	Challenges to carbonate-evaporite peritidal facies models and cycles: Insights from Lower Cretaceous stromatolite-bearing deposits (Oncala Group, N Spain)Quijada, I. EmmaBenito Moreno, María IsabelSuárez González, PabloRodríguez Martínez, MartaCampos Soto, Sonia551.351Tidal flatCoastal sabkhaMicrobialitesAnhydrite nodulesFacies mosaicCameros BasinGeología estratigráficaPetrología2506.19 EstratigrafíaPeritidal carbonate-evaporite successions, since they are developed in the transition between continental and marine realms, provide essential keys for palaeobathymetric and palaeoclimatic interpretations. As a result, several facies models have been proposed to assist on the interpretation of ancient tidal flat deposits, and peritidal successions have been extensively used for cyclicity analyses. In this study, well-exposed, Lower Cretaceous peritidal deposits (Oncala Group, Cameros Basin, N Spain) are analysed and compared with the most commonly-used present-day analogues (from Shark Bay, the Arabian Gulf and the Bahamas) and with ancient peritidal successions, providing their palaeoenvironmental and palaeoclimatic interpretation, assessing the usefulness and limitations of the facies models, and evaluating the suitability of these deposits for analysis of decimetre to metre-scale cycles. The studied peritidal deposits consist of thinly-bedded to laminated dolostones, dolomitic stromatolites, stromatolite breccias, flat-pebble and edgewise breccias, and calcite and quartz pseudomorphs after anhydrite nodules. Abundant resemblances of the peritidal deposits of the Oncala Group with those of Shark Bay, including that they are largely composed of microbialites and intraclasts, makes the peritidal deposits of the Oncala Group one of the best fossil analogues of this present-day setting. However, the presence of anhydrite nodules indicates pervasive evaporite precipitation in the supratidal zone, which is a feature that does not occur in supratidal flats of Shark Bay, but is characteristic of arid sabkhas of the Arabian Gulf. Nevertheless, the fact that carbonate-evaporite tidal flats of the Oncala Group were laterally related with siliciclastic tidal flats with large freshwater input and broadly inhabited by dinosaurs, suggests that anhydrites precipitated under less arid climates than those of the Arabian Gulf nowadays, pointing to semiarid climatic conditions during deposition. Moreover, the fact that peritidal deposits with anhydrite nodules were exclusively formed in a low-subsidence area of the Cameros Basin suggests that the rate of accommodation space creation also played an important role in their development. Regarding the comparison with other fossil peritidal sediments, the studied deposits show more abundant similarities with Proterozoic and Cambrian successions, composed mainly of stromatolites, microbial laminites, and intraclasts, than with other Mesozoic peritidal deposits, in which bioclasts and burrowing are usually more abundant. This highlights the difficulties for assigning specific features to certain geological ages. Finally, peritidal facies of the Oncala Group may change laterally and vertically to any other facies, showing a patchy lateral distribution of facies and an unsystematic vertical stacking pattern. The sedimentary features of the stromatolite, breccia and thinly-bedded to laminated dolostone facies do not allow their assignment to a unique tidal zone. Moreover, sedimentary features indicative of subaerial exposure, such as anhydrite nodules formed in the capillary zone, occur within any of the carbonate facies and show limited lateral extent. This results in a succession that cannot be clearly subdivided into subsequent shallowing-upward cycles not even by using erosive surfaces or the anhydrite nodule layers as marker horizons of the upper part of the cycles, because their limited lateral extent prevents reliable correlations. Similar composite lateral and vertical facies relationships have been documented both in the present-day analogues and in ancient successions, which suggests that this kind of facies relationships may be common in peritidal successions and highlights the caution that must be taken when trying to perform cyclicity analysis on them.ElsevierUniversidad Complutense de Madrid20202020-01-0120202020-01-01journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfapplication/pdfhttps://hdl.handle.net/20.500.14352/6713reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)InglésengAgencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020 PGC2018-094034-B-C21 SEDIMENTOLOGIA Y PALEONTOLOGIA UNIDAS EN EL ESTUDIO DE LA FORMACION Y CONSERVACION DE FOSILES DE DINOSAURIO (JURA. SUP.-CRETAC. INF.): EXPLORANDO POSIBLES PUENTES TERRESTRESMinisterio de Economía y Competitividad http://dx.doi.org/10.13039/501100003329 Not available CGL2014-52670-P PALEOGEOGRAFIA Y EVOLUCION DE LOS SISTEMAS COSTEROS DEL SE Y NO DE LA CUENCA IBERICA EN EL JURASICO SUP.-CRETACICO INF. Y SU RELACION CON EL REGISTRO DE FOSILES DE DINOSAURIOSopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/67132026-06-02T12:44:21Z
score	15,81155

Challenges to carbonate-evaporite peritidal facies models and cycles: Insights from Lower Cretaceous stromatolite-bearing deposits (Oncala Group, N Spain)

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