Filling the gap: New precise Early Cretaceous radioisotopic ages from the Andes

Two tuffs in the Lower Cretaceous Agrio Formation, Neuquén Basin, provided U-Pb zircon radioisotopic ages of 129.09±0.16 Ma and 127.42±0.15 Ma. Both horizons are well constrained biostratigraphically by ammonites and nannofossils and can be correlated with the 'standard' sequence of the Me...

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Autores principales:	Aguirre-Urreta, B., Lescano, M., Schmitz, M.D., Tunik, M., Concheyro, A., Rawson, P.F., Ramos, V.A.
Formato:	JOUR
Materias:	ammonoids Argentina biostratigraphy calcareous nannofossils Hauterivian Neuquén Basin U-Pb CA-ID-TIMS age determination ammonite Cretaceous nanofossil radionuclide tuff uranium-lead dating zircon Andes Neuquen Basin Ammonoidea
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00167568_v152_n3_p557_AguirreUrreta
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00167568_v152_n3_p557_AguirreUrreta
record_format	dspace
spelling	todo:paper_00167568_v152_n3_p557_AguirreUrreta2023-10-03T14:14:43Z Filling the gap: New precise Early Cretaceous radioisotopic ages from the Andes Aguirre-Urreta, B. Lescano, M. Schmitz, M.D. Tunik, M. Concheyro, A. Rawson, P.F. Ramos, V.A. ammonoids Argentina biostratigraphy calcareous nannofossils Hauterivian Neuquén Basin U-Pb CA-ID-TIMS age determination ammonite biostratigraphy Cretaceous nanofossil radionuclide tuff uranium-lead dating zircon Andes Argentina Neuquen Basin Ammonoidea Two tuffs in the Lower Cretaceous Agrio Formation, Neuquén Basin, provided U-Pb zircon radioisotopic ages of 129.09±0.16 Ma and 127.42±0.15 Ma. Both horizons are well constrained biostratigraphically by ammonites and nannofossils and can be correlated with the 'standard' sequence of the Mediterranean Province. The lower horizon is very close to the base of the Upper Hauterivian and the upper horizon to the Hauterivian/Barremian boundary, indicating that the former lies at c. 129.5 Ma and the latter at c. 127 Ma. These new radioisotopic ages fill a gap of over 8 million years in the numerical calibration of the current global Early Cretaceous geological time scale. Copyright © Cambridge University Press 2015. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00167568_v152_n3_p557_AguirreUrreta
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	ammonoids Argentina biostratigraphy calcareous nannofossils Hauterivian Neuquén Basin U-Pb CA-ID-TIMS age determination ammonite biostratigraphy Cretaceous nanofossil radionuclide tuff uranium-lead dating zircon Andes Argentina Neuquen Basin Ammonoidea
spellingShingle	ammonoids Argentina biostratigraphy calcareous nannofossils Hauterivian Neuquén Basin U-Pb CA-ID-TIMS age determination ammonite biostratigraphy Cretaceous nanofossil radionuclide tuff uranium-lead dating zircon Andes Argentina Neuquen Basin Ammonoidea Aguirre-Urreta, B. Lescano, M. Schmitz, M.D. Tunik, M. Concheyro, A. Rawson, P.F. Ramos, V.A. Filling the gap: New precise Early Cretaceous radioisotopic ages from the Andes
topic_facet	ammonoids Argentina biostratigraphy calcareous nannofossils Hauterivian Neuquén Basin U-Pb CA-ID-TIMS age determination ammonite biostratigraphy Cretaceous nanofossil radionuclide tuff uranium-lead dating zircon Andes Argentina Neuquen Basin Ammonoidea
description	Two tuffs in the Lower Cretaceous Agrio Formation, Neuquén Basin, provided U-Pb zircon radioisotopic ages of 129.09±0.16 Ma and 127.42±0.15 Ma. Both horizons are well constrained biostratigraphically by ammonites and nannofossils and can be correlated with the 'standard' sequence of the Mediterranean Province. The lower horizon is very close to the base of the Upper Hauterivian and the upper horizon to the Hauterivian/Barremian boundary, indicating that the former lies at c. 129.5 Ma and the latter at c. 127 Ma. These new radioisotopic ages fill a gap of over 8 million years in the numerical calibration of the current global Early Cretaceous geological time scale. Copyright © Cambridge University Press 2015.
format	JOUR
author	Aguirre-Urreta, B. Lescano, M. Schmitz, M.D. Tunik, M. Concheyro, A. Rawson, P.F. Ramos, V.A.
author_facet	Aguirre-Urreta, B. Lescano, M. Schmitz, M.D. Tunik, M. Concheyro, A. Rawson, P.F. Ramos, V.A.
author_sort	Aguirre-Urreta, B.
title	Filling the gap: New precise Early Cretaceous radioisotopic ages from the Andes
title_short	Filling the gap: New precise Early Cretaceous radioisotopic ages from the Andes
title_full	Filling the gap: New precise Early Cretaceous radioisotopic ages from the Andes
title_fullStr	Filling the gap: New precise Early Cretaceous radioisotopic ages from the Andes
title_full_unstemmed	Filling the gap: New precise Early Cretaceous radioisotopic ages from the Andes
title_sort	filling the gap: new precise early cretaceous radioisotopic ages from the andes
url	http://hdl.handle.net/20.500.12110/paper_00167568_v152_n3_p557_AguirreUrreta
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Filling the gap: New precise Early Cretaceous radioisotopic ages from the Andes

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