New 40Ar/39Ar radiometric ages of lamproites indicate latest Tortonian marine restriction of the Fortuna Basin, Eastern Betics, southern Spain

Exposures of lamproitic volcanic rocks have been used to constrain the age of the evaporitic basin-fill in the Fortuna Basin of southern Spain. K/Ar dates initially suggested a Messinian age assignment for these deposits; however, subsequent 40Ar/39Ar dates indicated a Tortonian age, implying the ea...

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Autores: Gibert Beotas, Lluís, Deino, Alan, Carrazana, Ariana, Cruset Segura, David, Playà i Pous, Elisabet, Ibaññez-Insa, Jordi, Gimeno Torrente, Domingo, Garcia-Veigas, Javier, Lería Morillo, María, Pineda, Victoriano
Tipo de recurso: artículo
Fecha de publicación:2023
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/201987
Acceso en línea:https://hdl.handle.net/2445/201987
Access Level:acceso abierto
Palabra clave:Lamproïtes
Roques volcàniques
Magnetoestratigrafia
Lamproites
Volcanic rocks
Magnetostratigraphy
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spelling New 40Ar/39Ar radiometric ages of lamproites indicate latest Tortonian marine restriction of the Fortuna Basin, Eastern Betics, southern SpainGibert Beotas, LluísDeino, AlanCarrazana, ArianaCruset Segura, DavidPlayà i Pous, ElisabetIbaññez-Insa, JordiGimeno Torrente, DomingoGarcia-Veigas, JavierLería Morillo, MaríaPineda, VictorianoLamproïtesRoques volcàniquesMagnetoestratigrafiaLamproitesVolcanic rocksMagnetostratigraphyExposures of lamproitic volcanic rocks have been used to constrain the age of the evaporitic basin-fill in the Fortuna Basin of southern Spain. K/Ar dates initially suggested a Messinian age assignment for these deposits; however, subsequent 40Ar/39Ar dates indicated a Tortonian age, implying the early onset of evaporite formation in the eastern Betic Cordillera, in an event termed the "Tortonian Salinity Crisis". In this paper, we critically review the published chronology of the key igneous outcrops and provide new 40Ar/39Ar ages, which show that the Cabezos Negros lamproites lie close to the Tortonian-Messinian boundary (c. 7.25 ​Ma). We also provide new paleomagnetic measurements from each of the three lamproitic outcrops (Cabezos Negros, Derramadores, and El Tale), which demonstrate normal magnetic polarity coincident with episodes of volcanic and subvolcanic activity. The presence of peperites and pillow structures indicate that volcanism at Cabezos Negros was coeval with deposition of the lower part of Rambla Salada Gypsum Member. Therefore, the normal polarity identified in this unit should be equivalent to the normal polarity on the Cabezos Negros lamproites. These results indicate that the initial marine restriction and evaporitic deposition of Fortuna Basin occurred more than a million years before the Messinian Salinity Crisis.Elsevier2023info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2445/201987Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaIngléshttps://doi.org/10.1016/j.eve.2023.100001Reproducció del document publicat a: https://doi.org/10.1016/j.eve.2023.100001Evolving Earth, 2023, vol. 1, num. 1, p. 100001https://doi.org/10.1016/j.eve.2023.100001(c) The Author(s), 2023http://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/2019872026-05-27T06:46:51Z
dc.title.none.fl_str_mv New 40Ar/39Ar radiometric ages of lamproites indicate latest Tortonian marine restriction of the Fortuna Basin, Eastern Betics, southern Spain
title New 40Ar/39Ar radiometric ages of lamproites indicate latest Tortonian marine restriction of the Fortuna Basin, Eastern Betics, southern Spain
spellingShingle New 40Ar/39Ar radiometric ages of lamproites indicate latest Tortonian marine restriction of the Fortuna Basin, Eastern Betics, southern Spain
Gibert Beotas, Lluís
Lamproïtes
Roques volcàniques
Magnetoestratigrafia
Lamproites
Volcanic rocks
Magnetostratigraphy
title_short New 40Ar/39Ar radiometric ages of lamproites indicate latest Tortonian marine restriction of the Fortuna Basin, Eastern Betics, southern Spain
title_full New 40Ar/39Ar radiometric ages of lamproites indicate latest Tortonian marine restriction of the Fortuna Basin, Eastern Betics, southern Spain
title_fullStr New 40Ar/39Ar radiometric ages of lamproites indicate latest Tortonian marine restriction of the Fortuna Basin, Eastern Betics, southern Spain
title_full_unstemmed New 40Ar/39Ar radiometric ages of lamproites indicate latest Tortonian marine restriction of the Fortuna Basin, Eastern Betics, southern Spain
title_sort New 40Ar/39Ar radiometric ages of lamproites indicate latest Tortonian marine restriction of the Fortuna Basin, Eastern Betics, southern Spain
dc.creator.none.fl_str_mv Gibert Beotas, Lluís
Deino, Alan
Carrazana, Ariana
Cruset Segura, David
Playà i Pous, Elisabet
Ibaññez-Insa, Jordi
Gimeno Torrente, Domingo
Garcia-Veigas, Javier
Lería Morillo, María
Pineda, Victoriano
author Gibert Beotas, Lluís
author_facet Gibert Beotas, Lluís
Deino, Alan
Carrazana, Ariana
Cruset Segura, David
Playà i Pous, Elisabet
Ibaññez-Insa, Jordi
Gimeno Torrente, Domingo
Garcia-Veigas, Javier
Lería Morillo, María
Pineda, Victoriano
author_role author
author2 Deino, Alan
Carrazana, Ariana
Cruset Segura, David
Playà i Pous, Elisabet
Ibaññez-Insa, Jordi
Gimeno Torrente, Domingo
Garcia-Veigas, Javier
Lería Morillo, María
Pineda, Victoriano
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Lamproïtes
Roques volcàniques
Magnetoestratigrafia
Lamproites
Volcanic rocks
Magnetostratigraphy
topic Lamproïtes
Roques volcàniques
Magnetoestratigrafia
Lamproites
Volcanic rocks
Magnetostratigraphy
description Exposures of lamproitic volcanic rocks have been used to constrain the age of the evaporitic basin-fill in the Fortuna Basin of southern Spain. K/Ar dates initially suggested a Messinian age assignment for these deposits; however, subsequent 40Ar/39Ar dates indicated a Tortonian age, implying the early onset of evaporite formation in the eastern Betic Cordillera, in an event termed the "Tortonian Salinity Crisis". In this paper, we critically review the published chronology of the key igneous outcrops and provide new 40Ar/39Ar ages, which show that the Cabezos Negros lamproites lie close to the Tortonian-Messinian boundary (c. 7.25 ​Ma). We also provide new paleomagnetic measurements from each of the three lamproitic outcrops (Cabezos Negros, Derramadores, and El Tale), which demonstrate normal magnetic polarity coincident with episodes of volcanic and subvolcanic activity. The presence of peperites and pillow structures indicate that volcanism at Cabezos Negros was coeval with deposition of the lower part of Rambla Salada Gypsum Member. Therefore, the normal polarity identified in this unit should be equivalent to the normal polarity on the Cabezos Negros lamproites. These results indicate that the initial marine restriction and evaporitic deposition of Fortuna Basin occurred more than a million years before the Messinian Salinity Crisis.
publishDate 2023
dc.date.none.fl_str_mv 2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/201987
url https://hdl.handle.net/2445/201987
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1016/j.eve.2023.100001
Reproducció del document publicat a: https://doi.org/10.1016/j.eve.2023.100001
Evolving Earth, 2023, vol. 1, num. 1, p. 100001
https://doi.org/10.1016/j.eve.2023.100001
dc.rights.none.fl_str_mv (c) The Author(s), 2023
http://creativecommons.org/licenses/by/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) The Author(s), 2023
http://creativecommons.org/licenses/by/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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