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Título: Interhemispheric radio-astrochronological calibration of the time scales from the Andean and the Tethyan areas in the Valanginian-Hauterivian (Early Cretaceous).
Autor(es): Tunik, Maisa A.
Aguirre Urreta, Beatriz
Martinez, Mathieu
Schmitz, Mark
Lescano, Marina
Omarini Fernández, Julieta
Kuhnert, Henning
Concheyro, Andrea
Rawson, Peter F.
Ramos, Victor A.
Reboulet, Stéphane
Noclin, Nicolas
Frederichs, Thomas
Nickl, Anna L.
Pälike, Heiko
Fecha de publicación: 2019
Editorial: Elsevier
Citación: Aguirre Urreta, Beatriz and et al. (2019). Interhemispheric radio-astrochronological calibration of the time scales from the Andean and the Tethyan areas in the Valanginian–Hauterivian (Early Cretaceous). Elsevier; Gondwana Research; 70; 104-132.
Revista: Gondwana Research
Resumen: An integrated radio-astrochronological framework of the Agrio Formation in the Andean Neuquén Basin of westcentral Argentina provides new constraints on the age and the duration of the late Valanginian through Hauterivian stratigraphic interval. A CA-ID TIMS U-Pb age of 126.97 ± 0.04(0.07)[0.15] Ma is presented here from the upper Hauterivian Agua de la Mula Member of the Agrio Formation. Biostratigraphic data from ammonoids and calcareous nannofossils and this high precision new radioisotopic age, together with three former ones from the same Agrio Formation are combined with new astrochronological data in the Andes. These are correlated with modern cyclostratigraphic studies in the classical sections of the Mediterranean Province of the Tethys, supporting detailed interhemispheric correlations for the Early Cretaceous. We also provide new δ13C data from the Agrio Formation which are compared with records from the classic Tethyan sections. According to our calibration, the minimum in the values in the mid-Hauterivian appears to be synchronous and, thus, another important stratigraphic marker for global correlation. A new duration of 5.21 ± 0.08 myr is calculated for the Hauterivian Stage, starting at 131.29 ± 0.19 Ma and ending at 126.08 ± 0.19 Ma. The difference between the duration of the Hauterivian in GTS2016 and in this study is 1.32 myr while the base and top of the GTS2016 Hauterivian differ respectively by 3.40 and 4.69 myr.
URI: https://doi.org/10.1016/j.gr.2019.01.006
https://www.sciencedirect.com/science/article/pii/S1342937X19300413
https://rid.unrn.edu.ar/jspui/handle/20.500.12049/4137
ISSN: 1342-937X
1878-0571
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Este documento es resultado del financiamiento otorgado por el Estado Nacional, por lo tanto queda sujeto al cumplimiento de la Ley N° 26.899