20 Myr of eccentricity paced lacustrine cycles in the Cenozoic Ebro Basin

Long-period orbital forcing is a crucial component of the major global climate shifts during the Cenozoic as revealed in marine pelagic records. A complementary regional perspective of climate change can be assessed from internally drained lake basins, which are directly affected by insolation and p...

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Autores: Valero Montesa, Luis, Garcés Crespo, Miguel, Cabrera, Lluís, Costa Gisbert, Elisenda, Sáez, Alberto
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2014
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/59735
Acceso en línea:https://hdl.handle.net/2445/59735
Access Level:acceso abierto
Palabra clave:Sediments lacustres
Cenozoic
Ebre, Depressió de l'
Lake sediments
Ebro River Watershed (Spain)
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spelling 20 Myr of eccentricity paced lacustrine cycles in the Cenozoic Ebro BasinValero Montesa, LuisGarcés Crespo, MiguelCabrera, LluísCosta Gisbert, ElisendaSáez, AlbertoSediments lacustresCenozoicEbre, Depressió de l'Lake sedimentsCenozoicEbro River Watershed (Spain)Long-period orbital forcing is a crucial component of the major global climate shifts during the Cenozoic as revealed in marine pelagic records. A complementary regional perspective of climate change can be assessed from internally drained lake basins, which are directly affected by insolation and precipitation balance. The Ebro Basin in northeastern Iberia embraces a 20 Myr long continuous sedimentary record where recurrent expansions and retractions of the central lacustrine system suggest periodic shifts of water balance due to orbital oscillations. In order to test climatic (orbital) forcing a key-piece of the basin, the Los Monegros lacustrine system, has been analyzed in detail. The cyclostratigraphic analysis points to orbital eccentricity as pacemaker of short to long-term lacustrine sequences, and reveals a correlation of maxima of the 100-kyr, 400-kyr and 2.4-Myr eccentricity cycles with periods of lake expansion. A magnetostratigraphy-based chronostratigraphy of the complete continental record allows further assessing long-period orbital forcing at basin scale, a view that challenges alternate scenarios where the stratigraphic architecture in foreland systems is preferably associated to tectonic processes. We conclude that while the location of lacustrine depocenters reacted to the long-term tectonic-driven accommodation changes, shorter wavelenght oscillations of lake environments, still million-year scale, claims for a dominance of orbital forcing. We suggest a decoupling between (tectonic) supply-driven clastic sequences fed from basin margins and (climatic) base level-driven lacustrine sequences in active settings with medium to large sediment transfer systems.University College London, Faculty of Mathematical and Physical Sciences, Department of Mathematics2014info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://hdl.handle.net/2445/59735Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésVersió postprint del document publicat a: 10.1016/j.epsl.2014.10.007Earth and Planetary Science Letters, 2014, vol. 408, p. 183-193http://dx.doi.org/10.1016/j.epsl.2014.10.007(c) University College London, Faculty of Mathematical and Physical Sciences, Department of Mathematics, 2014info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/597352026-05-27T06:46:51Z
dc.title.none.fl_str_mv 20 Myr of eccentricity paced lacustrine cycles in the Cenozoic Ebro Basin
title 20 Myr of eccentricity paced lacustrine cycles in the Cenozoic Ebro Basin
spellingShingle 20 Myr of eccentricity paced lacustrine cycles in the Cenozoic Ebro Basin
Valero Montesa, Luis
Sediments lacustres
Cenozoic
Ebre, Depressió de l'
Lake sediments
Cenozoic
Ebro River Watershed (Spain)
title_short 20 Myr of eccentricity paced lacustrine cycles in the Cenozoic Ebro Basin
title_full 20 Myr of eccentricity paced lacustrine cycles in the Cenozoic Ebro Basin
title_fullStr 20 Myr of eccentricity paced lacustrine cycles in the Cenozoic Ebro Basin
title_full_unstemmed 20 Myr of eccentricity paced lacustrine cycles in the Cenozoic Ebro Basin
title_sort 20 Myr of eccentricity paced lacustrine cycles in the Cenozoic Ebro Basin
dc.creator.none.fl_str_mv Valero Montesa, Luis
Garcés Crespo, Miguel
Cabrera, Lluís
Costa Gisbert, Elisenda
Sáez, Alberto
author Valero Montesa, Luis
author_facet Valero Montesa, Luis
Garcés Crespo, Miguel
Cabrera, Lluís
Costa Gisbert, Elisenda
Sáez, Alberto
author_role author
author2 Garcés Crespo, Miguel
Cabrera, Lluís
Costa Gisbert, Elisenda
Sáez, Alberto
author2_role author
author
author
author
dc.subject.none.fl_str_mv Sediments lacustres
Cenozoic
Ebre, Depressió de l'
Lake sediments
Cenozoic
Ebro River Watershed (Spain)
topic Sediments lacustres
Cenozoic
Ebre, Depressió de l'
Lake sediments
Cenozoic
Ebro River Watershed (Spain)
description Long-period orbital forcing is a crucial component of the major global climate shifts during the Cenozoic as revealed in marine pelagic records. A complementary regional perspective of climate change can be assessed from internally drained lake basins, which are directly affected by insolation and precipitation balance. The Ebro Basin in northeastern Iberia embraces a 20 Myr long continuous sedimentary record where recurrent expansions and retractions of the central lacustrine system suggest periodic shifts of water balance due to orbital oscillations. In order to test climatic (orbital) forcing a key-piece of the basin, the Los Monegros lacustrine system, has been analyzed in detail. The cyclostratigraphic analysis points to orbital eccentricity as pacemaker of short to long-term lacustrine sequences, and reveals a correlation of maxima of the 100-kyr, 400-kyr and 2.4-Myr eccentricity cycles with periods of lake expansion. A magnetostratigraphy-based chronostratigraphy of the complete continental record allows further assessing long-period orbital forcing at basin scale, a view that challenges alternate scenarios where the stratigraphic architecture in foreland systems is preferably associated to tectonic processes. We conclude that while the location of lacustrine depocenters reacted to the long-term tectonic-driven accommodation changes, shorter wavelenght oscillations of lake environments, still million-year scale, claims for a dominance of orbital forcing. We suggest a decoupling between (tectonic) supply-driven clastic sequences fed from basin margins and (climatic) base level-driven lacustrine sequences in active settings with medium to large sediment transfer systems.
publishDate 2014
dc.date.none.fl_str_mv 2014
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/59735
url https://hdl.handle.net/2445/59735
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: 10.1016/j.epsl.2014.10.007
Earth and Planetary Science Letters, 2014, vol. 408, p. 183-193
http://dx.doi.org/10.1016/j.epsl.2014.10.007
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv University College London, Faculty of Mathematical and Physical Sciences, Department of Mathematics
publisher.none.fl_str_mv University College London, Faculty of Mathematical and Physical Sciences, Department of Mathematics
dc.source.none.fl_str_mv Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)
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 15,301629

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