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...

Descripción completa

Detalles Bibliográficos
Publicado: 2015
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:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00167568_v152_n3_p557_AguirreUrreta
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 paper:paper_00167568_v152_n3_p557_AguirreUrreta
record_format dspace
spelling paper:paper_00167568_v152_n3_p557_AguirreUrreta2023-06-08T14:38:50Z Filling the gap: New precise Early Cretaceous radioisotopic ages from the Andes 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. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00167568_v152_n3_p557_AguirreUrreta 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
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.
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
publishDate 2015
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00167568_v152_n3_p557_AguirreUrreta
http://hdl.handle.net/20.500.12110/paper_00167568_v152_n3_p557_AguirreUrreta
_version_ 1768546704570712064

Ejemplares similares