U-Pb detrital zircon ages of upper jurassic continental successions: Implications for the provenance and absolute age of the jurassic-cretaceous boundary in the Neuquén Basin

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New U-Pb detrital zircon ages are presented for the Tordillo Formation. The ages indicate that the most important source region of sediment supply was the Jurassic Andean arc (peaks at c. 144, 153 and 178 Ma), although two secondary sources were defined at c. 218 and 275 Ma. Temporal variation in th...

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Autores principales: Naipauer, Maximiliano, Tunik, Maísa Andrea, Vujovich, Graciela Irene, Ramos, Victor Alberto
Publicado: 2015
Materias:
age determination
chronostratigraphy
geochronology
Jurassic-Cretaceous boundary
provenance
sedimentation
uranium-lead dating
Argentina
Neuquen Basin
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03058719_v399_n_p131_Naipauer
http://hdl.handle.net/20.500.12110/paper_03058719_v399_n_p131_Naipauer
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_03058719_v399_n_p131_Naipauer2023-06-08T15:30:58Z U-Pb detrital zircon ages of upper jurassic continental successions: Implications for the provenance and absolute age of the jurassic-cretaceous boundary in the Neuquén Basin Naipauer, Maximiliano Tunik, Maísa Andrea Vujovich, Graciela Irene Ramos, Victor Alberto age determination chronostratigraphy geochronology Jurassic-Cretaceous boundary provenance sedimentation uranium-lead dating Argentina Neuquen Basin New U-Pb detrital zircon ages are presented for the Tordillo Formation. The ages indicate that the most important source region of sediment supply was the Jurassic Andean arc (peaks at c. 144, 153 and 178 Ma), although two secondary sources were defined at c. 218 and 275 Ma. Temporal variation in the provenance indicates that at the beginning of the sedimentation, Carboniferous to Lower Jurassic magmatic rocks and Lower Palaeozoic metamorphic rocks were the most important sources. Towards the top, the data suggest that the Andean arc becomes the main source region. The comparison between provenance patterns of the Tordillo Formation and of the Avilé Member (Agrio Formation) showed some differences. In the former, the arc region played a considerable role as a source region, but this is not identified in the latter. The results permit a statistically robust estimation of the maximum deposition age for the Tordillo Formation at c. 144 Ma. This younger age represents a discrepancy of at least 7 Ma from the absolute age of the Kimmeridgian and Tithonian boundary (from the chronostratigraphic timescale accepted by the International Commission of Stratigraphy, IUGS), and has strong implications for the absolute age of the Jurassic-Cretaceous boundary. © 2015 The Geological Society of London. Fil:Naipauer, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Tunik, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vujovich, G.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ramos, V.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03058719_v399_n_p131_Naipauer http://hdl.handle.net/20.500.12110/paper_03058719_v399_n_p131_Naipauer
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic age determination
chronostratigraphy
geochronology
Jurassic-Cretaceous boundary
provenance
sedimentation
uranium-lead dating
Argentina
Neuquen Basin
spellingShingle age determination
chronostratigraphy
geochronology
Jurassic-Cretaceous boundary
provenance
sedimentation
uranium-lead dating
Argentina
Neuquen Basin
Naipauer, Maximiliano
Tunik, Maísa Andrea
Vujovich, Graciela Irene
Ramos, Victor Alberto
U-Pb detrital zircon ages of upper jurassic continental successions: Implications for the provenance and absolute age of the jurassic-cretaceous boundary in the Neuquén Basin
topic_facet age determination
chronostratigraphy
geochronology
Jurassic-Cretaceous boundary
provenance
sedimentation
uranium-lead dating
Argentina
Neuquen Basin
description New U-Pb detrital zircon ages are presented for the Tordillo Formation. The ages indicate that the most important source region of sediment supply was the Jurassic Andean arc (peaks at c. 144, 153 and 178 Ma), although two secondary sources were defined at c. 218 and 275 Ma. Temporal variation in the provenance indicates that at the beginning of the sedimentation, Carboniferous to Lower Jurassic magmatic rocks and Lower Palaeozoic metamorphic rocks were the most important sources. Towards the top, the data suggest that the Andean arc becomes the main source region. The comparison between provenance patterns of the Tordillo Formation and of the Avilé Member (Agrio Formation) showed some differences. In the former, the arc region played a considerable role as a source region, but this is not identified in the latter. The results permit a statistically robust estimation of the maximum deposition age for the Tordillo Formation at c. 144 Ma. This younger age represents a discrepancy of at least 7 Ma from the absolute age of the Kimmeridgian and Tithonian boundary (from the chronostratigraphic timescale accepted by the International Commission of Stratigraphy, IUGS), and has strong implications for the absolute age of the Jurassic-Cretaceous boundary. © 2015 The Geological Society of London.
author Naipauer, Maximiliano
Tunik, Maísa Andrea
Vujovich, Graciela Irene
Ramos, Victor Alberto
author_facet Naipauer, Maximiliano
Tunik, Maísa Andrea
Vujovich, Graciela Irene
Ramos, Victor Alberto
author_sort Naipauer, Maximiliano
title U-Pb detrital zircon ages of upper jurassic continental successions: Implications for the provenance and absolute age of the jurassic-cretaceous boundary in the Neuquén Basin
title_short U-Pb detrital zircon ages of upper jurassic continental successions: Implications for the provenance and absolute age of the jurassic-cretaceous boundary in the Neuquén Basin
title_full U-Pb detrital zircon ages of upper jurassic continental successions: Implications for the provenance and absolute age of the jurassic-cretaceous boundary in the Neuquén Basin
title_fullStr U-Pb detrital zircon ages of upper jurassic continental successions: Implications for the provenance and absolute age of the jurassic-cretaceous boundary in the Neuquén Basin
title_full_unstemmed U-Pb detrital zircon ages of upper jurassic continental successions: Implications for the provenance and absolute age of the jurassic-cretaceous boundary in the Neuquén Basin
title_sort u-pb detrital zircon ages of upper jurassic continental successions: implications for the provenance and absolute age of the jurassic-cretaceous boundary in the neuquén basin
publishDate 2015
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03058719_v399_n_p131_Naipauer
http://hdl.handle.net/20.500.12110/paper_03058719_v399_n_p131_Naipauer
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AT vujovichgracielairene upbdetritalzirconagesofupperjurassiccontinentalsuccessionsimplicationsfortheprovenanceandabsoluteageofthejurassiccretaceousboundaryintheneuquenbasin
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