Can in-situ cosmogenic 14C be used to assess the influence of clast recycling on exposure dating of ice retreat in Antarctica?

Duanne White, Reka Hajnalka-Fulop, Paul Bishop, Andrew Mackintosh, Gordon Cook

    Research output: Contribution to journalArticle

    18 Citations (Scopus)

    Abstract

    Cosmogenic nuclide exposure dating of glacial clasts is becoming a common and robust method for reconstructing the history of glaciers and ice sheets. In Antarctica, however, many samples exhibit cosmogenic nuclide â¿¿inheritanceâ¿¿ as a result of sediment recycling and exposure to cosmic radiation during previous ice free periods. In-situ cosmogenic 14C, in combination with longer lived nuclides such as 10Be, can be used to detect inheritance because the relatively short half-life of 14C means that in-situ 14C acquired in exposure during previous interglacials decays away while the sample locality is covered by ice during the subsequent glacial. Measurements of in-situ 14C in clasts from the last deglaciation of the Framnes Mountains in East Antarctica provide deglaciation ages that are concordant with existing 26Al and 10Be ages, suggesting that in this area, the younger population of erratics contain limited inheritance.
    Original languageEnglish
    Pages (from-to)289-294
    Number of pages6
    JournalQuaternary Geochronology
    Volume6
    Issue number3-4
    DOIs
    Publication statusPublished - 2011

    Fingerprint

    ice retreat
    clast
    recycling
    ice
    last deglaciation
    young population
    erratic
    deglaciation
    half life
    ice sheet
    glacier
    mountain
    history
    sediment
    in situ
    dating
    exposure
    Antarctica

    Cite this

    White, Duanne ; Hajnalka-Fulop, Reka ; Bishop, Paul ; Mackintosh, Andrew ; Cook, Gordon. / Can in-situ cosmogenic 14C be used to assess the influence of clast recycling on exposure dating of ice retreat in Antarctica?. In: Quaternary Geochronology. 2011 ; Vol. 6, No. 3-4. pp. 289-294.
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    title = "Can in-situ cosmogenic 14C be used to assess the influence of clast recycling on exposure dating of ice retreat in Antarctica?",
    abstract = "Cosmogenic nuclide exposure dating of glacial clasts is becoming a common and robust method for reconstructing the history of glaciers and ice sheets. In Antarctica, however, many samples exhibit cosmogenic nuclide {\^a}¿¿inheritance{\^a}¿¿ as a result of sediment recycling and exposure to cosmic radiation during previous ice free periods. In-situ cosmogenic 14C, in combination with longer lived nuclides such as 10Be, can be used to detect inheritance because the relatively short half-life of 14C means that in-situ 14C acquired in exposure during previous interglacials decays away while the sample locality is covered by ice during the subsequent glacial. Measurements of in-situ 14C in clasts from the last deglaciation of the Framnes Mountains in East Antarctica provide deglaciation ages that are concordant with existing 26Al and 10Be ages, suggesting that in this area, the younger population of erratics contain limited inheritance.",
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    Can in-situ cosmogenic 14C be used to assess the influence of clast recycling on exposure dating of ice retreat in Antarctica? / White, Duanne; Hajnalka-Fulop, Reka; Bishop, Paul; Mackintosh, Andrew; Cook, Gordon.

    In: Quaternary Geochronology, Vol. 6, No. 3-4, 2011, p. 289-294.

    Research output: Contribution to journalArticle

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    AU - White, Duanne

    AU - Hajnalka-Fulop, Reka

    AU - Bishop, Paul

    AU - Mackintosh, Andrew

    AU - Cook, Gordon

    PY - 2011

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    AB - Cosmogenic nuclide exposure dating of glacial clasts is becoming a common and robust method for reconstructing the history of glaciers and ice sheets. In Antarctica, however, many samples exhibit cosmogenic nuclide â¿¿inheritanceâ¿¿ as a result of sediment recycling and exposure to cosmic radiation during previous ice free periods. In-situ cosmogenic 14C, in combination with longer lived nuclides such as 10Be, can be used to detect inheritance because the relatively short half-life of 14C means that in-situ 14C acquired in exposure during previous interglacials decays away while the sample locality is covered by ice during the subsequent glacial. Measurements of in-situ 14C in clasts from the last deglaciation of the Framnes Mountains in East Antarctica provide deglaciation ages that are concordant with existing 26Al and 10Be ages, suggesting that in this area, the younger population of erratics contain limited inheritance.

    KW - Inheritance

    KW - Multiple isotope

    KW - Glacier

    KW - Accelerator mass spectroscopy

    U2 - 10.1016/j.quageo.2011.03.004

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    JO - Quaternary Geochronology

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    ER -