A Refined Astronomically Calibrated 40Ar/39Ar Age for Fish Canyon Sanidine

Tiffany Rivera, Michael Storey, Christian Zeeden, Frederik Hilgen, Klaudia Kuiper

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

    Resumé

    Intercalibration between the astronomical and radio-isotopic dating methods provides a means to improving accuracy and reducing uncertainty of an integrated, multi-chronometer geologic timescale. Here we report a high-precision 40Ar/39Ar age for the Fish Canyon sanidine (FCs) neutron fluence monitor, by multi-collector noble gas mass spectrometry, through cross-calibration with A1 tephra sanidines (A1Ts) of the direct astronomically tuned Faneromeni section (Crete). The astronomically intercalibrated 40Ar/39Ar age of FCs of 28.172 ± 0.028 Ma (2σ, external errors) is within the uncertainty of, but more precise (± 0.10%) than, the previous 40Ar/39Ar age determined by intercalibration with astronomically tuned tephras from the Melilla Basin (Morocco). Using this proposed age for FCs, combined with measurements using the A1Ts as the neutron fluence monitor, a weighted mean Bishop Tuff 40Ar/39Ar sanidine age of 0.7674 ± 0.0022 Ma (2σ, external errors) is indistinguishable from the ID-TIMS U/Pb zircon age (0.7671 ± 0.0019 Ma). The consistency between the astronomically calibrated 40Ar/39Ar sanidine age and U/Pb zircon age for this Quaternary unit suggests that agreement between these two radio-isotopic dating techniques is now achievable at better than ± 0.3% (2σ) in the youngest part of geologic time (< 1 Ma).

    OriginalsprogEngelsk
    TidsskriftEarth and Planetary Science Letters
    Vol/bind311
    Udgave nummer3-4
    Sider (fra-til)420-426
    ISSN0012-821X
    DOI
    StatusUdgivet - 15 nov. 2011

    Citer dette

    Rivera, Tiffany ; Storey, Michael ; Zeeden, Christian ; Hilgen, Frederik ; Kuiper, Klaudia. / A Refined Astronomically Calibrated 40Ar/39Ar Age for Fish Canyon Sanidine. I: Earth and Planetary Science Letters. 2011 ; Bind 311, Nr. 3-4. s. 420-426.
    @article{fc02114e6494406c8b947cbce4d327ff,
    title = "A Refined Astronomically Calibrated 40Ar/39Ar Age for Fish Canyon Sanidine",
    abstract = "Intercalibration between the astronomical and radio-isotopic dating methods provides a means to improving accuracy and reducing uncertainty of an integrated, multi-chronometer geologic timescale. Here we report a high-precision 40Ar/39Ar age for the Fish Canyon sanidine (FCs) neutron fluence monitor, by multi-collector noble gas mass spectrometry, through cross-calibration with A1 tephra sanidines (A1Ts) of the direct astronomically tuned Faneromeni section (Crete). The astronomically intercalibrated 40Ar/39Ar age of FCs of 28.172±0.028 Ma (2σ, external errors) is within the uncertainty of, but more precise (±0.10{\%}) than, the previous 40Ar/39Ar age determined by intercalibration with astronomically tuned tephras from the Melilla Basin (Morocco). Using this proposed age for FCs, combined with measurements using the A1Ts as the neutron fluence monitor, a weighted mean Bishop Tuff 40Ar/39Ar sanidine age of 0.7674±0.0022 Ma (2σ, external errors) is indistinguishable from the ID-TIMS U/Pb zircon age (0.7671±0.0019 Ma). The consistency between the astronomically calibrated 40Ar/39Ar sanidine age and U/Pb zircon age for this Quaternary unit suggests that agreement between these two radio-isotopic dating techniques is now achievable at better than±0.3{\%} (2σ) in the youngest part of geologic time (<1 Ma).",
    keywords = "geochronology, Bishop Tuff, Quaternary, Neogene, EARTHTIME",
    author = "Tiffany Rivera and Michael Storey and Christian Zeeden and Frederik Hilgen and Klaudia Kuiper",
    year = "2011",
    month = "11",
    day = "15",
    doi = "10.1016/j.epsl.2011.09.017",
    language = "English",
    volume = "311",
    pages = "420--426",
    journal = "Earth and Planetary Science Letters",
    issn = "0012-821X",
    publisher = "Elsevier BV",
    number = "3-4",

    }

    A Refined Astronomically Calibrated 40Ar/39Ar Age for Fish Canyon Sanidine. / Rivera, Tiffany; Storey, Michael; Zeeden, Christian; Hilgen, Frederik; Kuiper, Klaudia.

    I: Earth and Planetary Science Letters, Bind 311, Nr. 3-4, 15.11.2011, s. 420-426.

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

    TY - JOUR

    T1 - A Refined Astronomically Calibrated 40Ar/39Ar Age for Fish Canyon Sanidine

    AU - Rivera, Tiffany

    AU - Storey, Michael

    AU - Zeeden, Christian

    AU - Hilgen, Frederik

    AU - Kuiper, Klaudia

    PY - 2011/11/15

    Y1 - 2011/11/15

    N2 - Intercalibration between the astronomical and radio-isotopic dating methods provides a means to improving accuracy and reducing uncertainty of an integrated, multi-chronometer geologic timescale. Here we report a high-precision 40Ar/39Ar age for the Fish Canyon sanidine (FCs) neutron fluence monitor, by multi-collector noble gas mass spectrometry, through cross-calibration with A1 tephra sanidines (A1Ts) of the direct astronomically tuned Faneromeni section (Crete). The astronomically intercalibrated 40Ar/39Ar age of FCs of 28.172±0.028 Ma (2σ, external errors) is within the uncertainty of, but more precise (±0.10%) than, the previous 40Ar/39Ar age determined by intercalibration with astronomically tuned tephras from the Melilla Basin (Morocco). Using this proposed age for FCs, combined with measurements using the A1Ts as the neutron fluence monitor, a weighted mean Bishop Tuff 40Ar/39Ar sanidine age of 0.7674±0.0022 Ma (2σ, external errors) is indistinguishable from the ID-TIMS U/Pb zircon age (0.7671±0.0019 Ma). The consistency between the astronomically calibrated 40Ar/39Ar sanidine age and U/Pb zircon age for this Quaternary unit suggests that agreement between these two radio-isotopic dating techniques is now achievable at better than±0.3% (2σ) in the youngest part of geologic time (<1 Ma).

    AB - Intercalibration between the astronomical and radio-isotopic dating methods provides a means to improving accuracy and reducing uncertainty of an integrated, multi-chronometer geologic timescale. Here we report a high-precision 40Ar/39Ar age for the Fish Canyon sanidine (FCs) neutron fluence monitor, by multi-collector noble gas mass spectrometry, through cross-calibration with A1 tephra sanidines (A1Ts) of the direct astronomically tuned Faneromeni section (Crete). The astronomically intercalibrated 40Ar/39Ar age of FCs of 28.172±0.028 Ma (2σ, external errors) is within the uncertainty of, but more precise (±0.10%) than, the previous 40Ar/39Ar age determined by intercalibration with astronomically tuned tephras from the Melilla Basin (Morocco). Using this proposed age for FCs, combined with measurements using the A1Ts as the neutron fluence monitor, a weighted mean Bishop Tuff 40Ar/39Ar sanidine age of 0.7674±0.0022 Ma (2σ, external errors) is indistinguishable from the ID-TIMS U/Pb zircon age (0.7671±0.0019 Ma). The consistency between the astronomically calibrated 40Ar/39Ar sanidine age and U/Pb zircon age for this Quaternary unit suggests that agreement between these two radio-isotopic dating techniques is now achievable at better than±0.3% (2σ) in the youngest part of geologic time (<1 Ma).

    KW - geochronology

    KW - Bishop Tuff

    KW - Quaternary

    KW - Neogene

    KW - EARTHTIME

    U2 - 10.1016/j.epsl.2011.09.017

    DO - 10.1016/j.epsl.2011.09.017

    M3 - Journal article

    VL - 311

    SP - 420

    EP - 426

    JO - Earth and Planetary Science Letters

    JF - Earth and Planetary Science Letters

    SN - 0012-821X

    IS - 3-4

    ER -