First U-Pb SHRIMP age of the Hauterivian stage, Neuquén Basin, Argentina

M. Beatriz Aguirre-Urreta; Pablo J. Pazos; Darío G. Lazo; C. Mark Fanning; Vanesa D. Litvak

doi:10.1016/j.jsames.2008.01.001

First U-Pb SHRIMP age of the Hauterivian stage, Neuquén Basin, Argentina

M. Beatriz Aguirre-Urreta^*, Pablo J. Pazos, Darío G. Lazo, C. Mark Fanning, Vanesa D. Litvak

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

53 Citations (Scopus)

Abstract

A high-resolution ion-microprobe (SHRIMP) U-Pb zircon age from a tuff layer intercalated in the ammonoid bearing sedimentary succession of the Neuquén Basin in Argentina provides a robust geochronologic date to add to the absolute ages and to improve the relative chronology of the Early Cretaceous Hauterivian stage. The tuff layer appears interbedded between shales of the upper member (Agua de la Mula) of the Agrio Formation within the Spitidiscus riccardii ammonoid zone (base of the Late Hauterivian) yielding a date of 132.5 ± 1.3 Ma. This date confirms and supports an accurate correlation between the ammonoid biostratigraphy of the Neuquén Basin with the Western Mediterranean Province of the Tethys during the Early Cretaceous and matches with the most recently published time scale. It also casts doubts on the validity of K-Ar ages on glauconite-grains recently reported from the Lower Cretaceous of the Vocontian Basin of France.

Original language	English
Pages (from-to)	91-99
Number of pages	9
Journal	Journal of South American Earth Sciences
Volume	26
Issue number	1
DOIs	https://doi.org/10.1016/j.jsames.2008.01.001
Publication status	Published - Jul 2008

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10.1016/j.jsames.2008.01.001

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@article{28ac31088e59480ba69b455c281e8ca3,

title = "First U-Pb SHRIMP age of the Hauterivian stage, Neuqu{\'e}n Basin, Argentina",

abstract = "A high-resolution ion-microprobe (SHRIMP) U-Pb zircon age from a tuff layer intercalated in the ammonoid bearing sedimentary succession of the Neuqu{\'e}n Basin in Argentina provides a robust geochronologic date to add to the absolute ages and to improve the relative chronology of the Early Cretaceous Hauterivian stage. The tuff layer appears interbedded between shales of the upper member (Agua de la Mula) of the Agrio Formation within the Spitidiscus riccardii ammonoid zone (base of the Late Hauterivian) yielding a date of 132.5 ± 1.3 Ma. This date confirms and supports an accurate correlation between the ammonoid biostratigraphy of the Neuqu{\'e}n Basin with the Western Mediterranean Province of the Tethys during the Early Cretaceous and matches with the most recently published time scale. It also casts doubts on the validity of K-Ar ages on glauconite-grains recently reported from the Lower Cretaceous of the Vocontian Basin of France.",

keywords = "Biostratigraphy, Hauterivian, Lower Cretaceous, Neuqu{\'e}n Basin, Tethys, U-Pb SHRIMP geochronology",

author = "Aguirre-Urreta, {M. Beatriz} and Pazos, {Pablo J.} and Lazo, {Dar{\'i}o G.} and {Mark Fanning}, C. and Litvak, {Vanesa D.}",

year = "2008",

month = jul,

doi = "10.1016/j.jsames.2008.01.001",

language = "English",

volume = "26",

pages = "91--99",

journal = "Journal of South American Earth Sciences",

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T1 - First U-Pb SHRIMP age of the Hauterivian stage, Neuquén Basin, Argentina

AU - Aguirre-Urreta, M. Beatriz

AU - Pazos, Pablo J.

AU - Lazo, Darío G.

AU - Mark Fanning, C.

AU - Litvak, Vanesa D.

PY - 2008/7

Y1 - 2008/7

N2 - A high-resolution ion-microprobe (SHRIMP) U-Pb zircon age from a tuff layer intercalated in the ammonoid bearing sedimentary succession of the Neuquén Basin in Argentina provides a robust geochronologic date to add to the absolute ages and to improve the relative chronology of the Early Cretaceous Hauterivian stage. The tuff layer appears interbedded between shales of the upper member (Agua de la Mula) of the Agrio Formation within the Spitidiscus riccardii ammonoid zone (base of the Late Hauterivian) yielding a date of 132.5 ± 1.3 Ma. This date confirms and supports an accurate correlation between the ammonoid biostratigraphy of the Neuquén Basin with the Western Mediterranean Province of the Tethys during the Early Cretaceous and matches with the most recently published time scale. It also casts doubts on the validity of K-Ar ages on glauconite-grains recently reported from the Lower Cretaceous of the Vocontian Basin of France.

AB - A high-resolution ion-microprobe (SHRIMP) U-Pb zircon age from a tuff layer intercalated in the ammonoid bearing sedimentary succession of the Neuquén Basin in Argentina provides a robust geochronologic date to add to the absolute ages and to improve the relative chronology of the Early Cretaceous Hauterivian stage. The tuff layer appears interbedded between shales of the upper member (Agua de la Mula) of the Agrio Formation within the Spitidiscus riccardii ammonoid zone (base of the Late Hauterivian) yielding a date of 132.5 ± 1.3 Ma. This date confirms and supports an accurate correlation between the ammonoid biostratigraphy of the Neuquén Basin with the Western Mediterranean Province of the Tethys during the Early Cretaceous and matches with the most recently published time scale. It also casts doubts on the validity of K-Ar ages on glauconite-grains recently reported from the Lower Cretaceous of the Vocontian Basin of France.

KW - Biostratigraphy

KW - Hauterivian

KW - Lower Cretaceous

KW - Neuquén Basin

KW - Tethys

KW - U-Pb SHRIMP geochronology

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U2 - 10.1016/j.jsames.2008.01.001

DO - 10.1016/j.jsames.2008.01.001

M3 - Article

SN - 0895-9811

VL - 26

SP - 91

EP - 99

JO - Journal of South American Earth Sciences

JF - Journal of South American Earth Sciences

IS - 1

ER -

First U-Pb SHRIMP age of the Hauterivian stage, Neuquén Basin, Argentina

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