Intrasediment gypsum in subtidal offshore carbonates as a witness of basin-wide evaporitic precipitation. The case of the southern Variscan foreland basin (mid-Carboniferous)

Díaz-García, Iván; Merino-Tomé, Óscar; Quijada, I. Emma; Bahamonde, Juan R.; Fernández, Luis P.; Della Porta, Giovanna; Samankassou, Elias; Kulagina, Elena I.; Gómez Borrego, Ángeles; Martín-Llaneza, Jaime; Del Pozo, José Federico

Intrasediment gypsum in subtidal offshore carbonates as a witness of basin-wide evaporitic precipitation. The case of the southern Variscan foreland basin (mid-Carboniferous)

Widespread calcite and quartz pseudomorphs, interpreted as originally gypsum crystals, occur within hemipelagic calci-mudstone accumulated in subtidal offshore environments in the broad marine foreland basin developed on the southern flank of the Ouachita–Alleghanian–Variscan Orogen during mid-Carbo...

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Autores:	Díaz-García, Iván, Merino-Tomé, Óscar, Quijada, I. Emma, Bahamonde, Juan R., Fernández, Luis P., Della Porta, Giovanna, Samankassou, Elias, Kulagina, Elena I., Gómez Borrego, Ángeles, Martín-Llaneza, Jaime, Del Pozo, José Federico
Tipo de recurso:	artículo
Estado:	Versión publicada
Fecha de publicación:	2024
País:	España
Institución:	Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:	DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:	oai:digital.csic.es:10261/376918
Acceso en línea:	http://hdl.handle.net/10261/376918 https://api.elsevier.com/content/abstract/scopus_id/85188526161
Access Level:	acceso abierto
Palabra clave:	Variscan foreland basin Barcaliente Fm Carboniferous Intrasediment gypsum Marine evaporites

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repository_id_str
dc.title.none.fl_str_mv	Intrasediment gypsum in subtidal offshore carbonates as a witness of basin-wide evaporitic precipitation. The case of the southern Variscan foreland basin (mid-Carboniferous)
title	Intrasediment gypsum in subtidal offshore carbonates as a witness of basin-wide evaporitic precipitation. The case of the southern Variscan foreland basin (mid-Carboniferous)
spellingShingle	Intrasediment gypsum in subtidal offshore carbonates as a witness of basin-wide evaporitic precipitation. The case of the southern Variscan foreland basin (mid-Carboniferous) Díaz-García, Iván Variscan foreland basin Barcaliente Fm Carboniferous Intrasediment gypsum Marine evaporites
title_short	Intrasediment gypsum in subtidal offshore carbonates as a witness of basin-wide evaporitic precipitation. The case of the southern Variscan foreland basin (mid-Carboniferous)
title_full	Intrasediment gypsum in subtidal offshore carbonates as a witness of basin-wide evaporitic precipitation. The case of the southern Variscan foreland basin (mid-Carboniferous)
title_fullStr	Intrasediment gypsum in subtidal offshore carbonates as a witness of basin-wide evaporitic precipitation. The case of the southern Variscan foreland basin (mid-Carboniferous)
title_full_unstemmed	Intrasediment gypsum in subtidal offshore carbonates as a witness of basin-wide evaporitic precipitation. The case of the southern Variscan foreland basin (mid-Carboniferous)
title_sort	Intrasediment gypsum in subtidal offshore carbonates as a witness of basin-wide evaporitic precipitation. The case of the southern Variscan foreland basin (mid-Carboniferous)
dc.creator.none.fl_str_mv	Díaz-García, Iván Merino-Tomé, Óscar Quijada, I. Emma Bahamonde, Juan R. Fernández, Luis P. Della Porta, Giovanna Samankassou, Elias Kulagina, Elena I. Gómez Borrego, Ángeles Martín-Llaneza, Jaime Del Pozo, José Federico
author	Díaz-García, Iván
author_facet	Díaz-García, Iván Merino-Tomé, Óscar Quijada, I. Emma Bahamonde, Juan R. Fernández, Luis P. Della Porta, Giovanna Samankassou, Elias Kulagina, Elena I. Gómez Borrego, Ángeles Martín-Llaneza, Jaime Del Pozo, José Federico
author_role	author
author2	Merino-Tomé, Óscar Quijada, I. Emma Bahamonde, Juan R. Fernández, Luis P. Della Porta, Giovanna Samankassou, Elias Kulagina, Elena I. Gómez Borrego, Ángeles Martín-Llaneza, Jaime Del Pozo, José Federico
author2_role	author author author author author author author author author author
dc.contributor.none.fl_str_mv	Ministerio de Ciencia e Innovación (España) Principado de Asturias Gómez Borrego, Ángeles [0000-0001-9021-7358] Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv	Variscan foreland basin Barcaliente Fm Carboniferous Intrasediment gypsum Marine evaporites
topic	Variscan foreland basin Barcaliente Fm Carboniferous Intrasediment gypsum Marine evaporites
description	Widespread calcite and quartz pseudomorphs, interpreted as originally gypsum crystals, occur within hemipelagic calci-mudstone accumulated in subtidal offshore environments in the broad marine foreland basin developed on the southern flank of the Ouachita–Alleghanian–Variscan Orogen during mid-Carboniferous times, which acted as a marine corridor connecting the Panthalassa and Palaeo-Tethys Oceans during the Mississippian, and progressively narrowed during the assembly of Pangea. In this study, 67 outcrops of radiolaria-bearing calci-mudstone deposits that contain calcite and quartz pseudomorphs located in northern Spain and southern France were studied to constrain the gypsum spatial distribution and sedimentological features. The recognised microfacies indicate intrasediment gypsum precipitation, accompanied by less abundant bottom-grown precipitates and gypsum cumulates, in extensive offshore, probably several ten to a few hundred metres deep, basinal environments. Gypsum precipitation took place during a short-lived temporal episode during the early Bashkirian time (Voznesenkian), which can be correlated, on the basis of benthic foraminifera, with the coastal (inter- to supratidal) gypsum evaporites identified in NW Africa (Tindouf and Reggan successions in Morocco and Algeria) that would represent the shallow-water counterparts. The occurrence of gypsum precipitates both in offshore hemipelagic calci-mudstones of the Variscan foreland basin and in inter- to supratidal environments of the epeiric Sahara Platform indicates that hypersaline conditions affected vast marine areas, roughly coinciding with the estimated age of closure of the Panthalassa and Palaeo-Tethys marine connection. Therefore, the studied succession represents the trace of a basin-wide evaporitic episode extending for hundreds of kilometres driven by foreland basin restriction, mid-Carboniferous sea-level fall and arid climate. This study provides new insights for the interpretation of gypsum precipitates in offshore marine environments encountered in the Phanerozoic and whose genesis is poorly understood.
publishDate	2024
dc.date.none.fl_str_mv	2024 2025 2025
dc.type.none.fl_str_mv	info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 Publisher's version info:eu-repo/semantics/publishedVersion
format	article
status_str	publishedVersion
dc.identifier.none.fl_str_mv	http://hdl.handle.net/10261/376918 https://api.elsevier.com/content/abstract/scopus_id/85188526161
url	http://hdl.handle.net/10261/376918 https://api.elsevier.com/content/abstract/scopus_id/85188526161
dc.language.none.fl_str_mv	Inglés
language_invalid_str_mv	Inglés
dc.relation.none.fl_str_mv	#PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MINECO//CGL2013-46458-C2-1-R info:eu-repo/grantAgreement/MINECO//CGL2013-44458-P info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-099698-B-I00 Sedimentary Geology https://doi.org/10.1016/j.sedgeo.2024.106605 Sí
dc.rights.none.fl_str_mv	info:eu-repo/semantics/openAccess
eu_rights_str_mv	openAccess
dc.publisher.none.fl_str_mv	Elsevier
publisher.none.fl_str_mv	Elsevier
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
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spelling	Intrasediment gypsum in subtidal offshore carbonates as a witness of basin-wide evaporitic precipitation. The case of the southern Variscan foreland basin (mid-Carboniferous)Díaz-García, IvánMerino-Tomé, ÓscarQuijada, I. EmmaBahamonde, Juan R.Fernández, Luis P.Della Porta, GiovannaSamankassou, EliasKulagina, Elena I.Gómez Borrego, ÁngelesMartín-Llaneza, JaimeDel Pozo, José FedericoVariscan foreland basinBarcaliente FmCarboniferousIntrasediment gypsumMarine evaporitesWidespread calcite and quartz pseudomorphs, interpreted as originally gypsum crystals, occur within hemipelagic calci-mudstone accumulated in subtidal offshore environments in the broad marine foreland basin developed on the southern flank of the Ouachita–Alleghanian–Variscan Orogen during mid-Carboniferous times, which acted as a marine corridor connecting the Panthalassa and Palaeo-Tethys Oceans during the Mississippian, and progressively narrowed during the assembly of Pangea. In this study, 67 outcrops of radiolaria-bearing calci-mudstone deposits that contain calcite and quartz pseudomorphs located in northern Spain and southern France were studied to constrain the gypsum spatial distribution and sedimentological features. The recognised microfacies indicate intrasediment gypsum precipitation, accompanied by less abundant bottom-grown precipitates and gypsum cumulates, in extensive offshore, probably several ten to a few hundred metres deep, basinal environments. Gypsum precipitation took place during a short-lived temporal episode during the early Bashkirian time (Voznesenkian), which can be correlated, on the basis of benthic foraminifera, with the coastal (inter- to supratidal) gypsum evaporites identified in NW Africa (Tindouf and Reggan successions in Morocco and Algeria) that would represent the shallow-water counterparts. The occurrence of gypsum precipitates both in offshore hemipelagic calci-mudstones of the Variscan foreland basin and in inter- to supratidal environments of the epeiric Sahara Platform indicates that hypersaline conditions affected vast marine areas, roughly coinciding with the estimated age of closure of the Panthalassa and Palaeo-Tethys marine connection. Therefore, the studied succession represents the trace of a basin-wide evaporitic episode extending for hundreds of kilometres driven by foreland basin restriction, mid-Carboniferous sea-level fall and arid climate. This study provides new insights for the interpretation of gypsum precipitates in offshore marine environments encountered in the Phanerozoic and whose genesis is poorly understood.This research has been supported by research projects CGL2013-46458-C2-1-R, CGL2013-44458-P and PGC2018-099698-B-I00 from the Spanish Government, SV-PA-13-ECOEMP-45, FC-GRUPIN-IDI/2018/000216 and AYUD/2021/51293 from the Principality of Asturias (FICYT), grants PAPI-19-PF-14 (University of Oviedo), PA-20-PF-BP19-139 (Principality of Asturias) and University of Oviedo — Santander Bank 2021–2022, and grant 160019 of the Swiss National Science Foundation. The work of E. Kulagina was carried out within the framework of the topic of the state task no. FMRS-2022-0010 (IG UFRC RAS). The authors are very grateful to F. Ortí for helpful discussion about the interpretation of the pseudomorphs after gypsum and the precipitation mechanisms. We would like to thank the two anonymous reviewers for their insightful comments, which improved the quality and clarity of the manuscript.Peer reviewedElsevierMinisterio de Ciencia e Innovación (España)Principado de AsturiasGómez Borrego, Ángeles [0000-0001-9021-7358]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252024info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/376918https://api.elsevier.com/content/abstract/scopus_id/85188526161reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO//CGL2013-46458-C2-1-Rinfo:eu-repo/grantAgreement/MINECO//CGL2013-44458-Pinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-099698-B-I00Sedimentary Geologyhttps://doi.org/10.1016/j.sedgeo.2024.106605Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3769182026-05-22T06:33:51Z
score	15,81155

Intrasediment gypsum in subtidal offshore carbonates as a witness of basin-wide evaporitic precipitation. The case of the southern Variscan foreland basin (mid-Carboniferous)

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