The Oligocene–Miocene transition climate recorded in a lacustrine sequence, Ebro Basin: preliminary insights
Arenas, Concha (Universidad de Zaragoza) ; Cabrera, Lluís ; Osácar, Mª Cinta (Universidad de Zaragoza) ; Valero, Luis ; Pérez-Rivarés, Javier ; Bastida, Joaquín ; Garcés, Miguel ; Auqué, Luis (Universidad de Zaragoza) ; Gil, Andres ; Gimeno, María J.
Resumen: The climate evolution across the Oligocene–Miocene transition has been studied through a 23.5 to 22 Ma succession in the eastern Ebro Basin, dated by magnetostratigraphy. The study is based on the δ13C and δ18O composition coupled with sedimentological analysis of a dominantly lacustrine and palustrine carbonate succession, focusing on the limestone facies. The deposits formed in alluvial plain, saline mud flat, and carbonate lacustrine and palustrine depositional environments. Changes in lake water level and hydrodynamics, and biological processes triggered the formation of distinct carbonate facies, causing isotopic differences among them. The isotopic variations likely reflect changes in the precipitation/evaporation ratio and temperature in the Ebro Basin that might be the regional record of the Mi-1 Glaciation. A change in variability in δ13C and δ18O and an inflection in δ13C mark the Oligocene–Miocene boundary (23.03 Ma). The decrease in δ13C and δ18O variability may correspond to steadier depositional, climatic and hydrological conditions through time.
Idioma: Español
DOI: 10.55407/geogaceta100684
Año: 2024
Publicado en: Geogaceta 75 (2024), 11-14
ISSN: 0213-683X
Financiación: info:eu-repo/grantAgreement/ES/MICINN-AEI/PID2019-106440GB-C21
Financiación: nfo:eu-repo/grantAgreement/ES/MICINN-AEI/PID2019-106440GB-C22
Tipo y forma: Article (Published version)
Área (Departamento): Área Petrología y Geoquímica (Dpto. Ciencias de la Tierra)
Área (Departamento): Área Estratigrafía (Dpto. Ciencias de la Tierra)
Área (Departamento): Área Cristalografía Mineralog. (Dpto. Ciencias de la Tierra)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
Exportado de SIDERAL (2024-09-12-13:05:50)
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Idioma: Español
DOI: 10.55407/geogaceta100684
Año: 2024
Publicado en: Geogaceta 75 (2024), 11-14
ISSN: 0213-683X
Financiación: info:eu-repo/grantAgreement/ES/MICINN-AEI/PID2019-106440GB-C21
Financiación: nfo:eu-repo/grantAgreement/ES/MICINN-AEI/PID2019-106440GB-C22
Tipo y forma: Article (Published version)
Área (Departamento): Área Petrología y Geoquímica (Dpto. Ciencias de la Tierra)
Área (Departamento): Área Estratigrafía (Dpto. Ciencias de la Tierra)
Área (Departamento): Área Cristalografía Mineralog. (Dpto. Ciencias de la Tierra)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original. Exportado de SIDERAL (2024-09-12-13:05:50)
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Este artículo se encuentra en las siguientes colecciones:
Articles > Artículos por área > Cristalografía y Mineralogía
Articles > Artículos por área > Petrología y Geoquímica
Articles > Artículos por área > Estratigrafía
Record created 2024-09-12, last modified 2024-09-12