Deglaciation and weathering of Larsemann Hills, East Antarctica

Kevin Kiernan, Damian Gore, David Fink, Duanne White, Anne McConnell, Ingvar Sigurdsson

    Research output: Contribution to journalArticle

    18 Citations (Scopus)

    Abstract

    In situ cosmogenic 10Be exposure dating, radiocarbon determinations, salt and sediment geochemistry, and rock weathering observations indicate that parts of Larsemann Hills, East Antarctica have been subaerially exposed throughout much of the last glacial cycle, with the last glaciation occurring prior to 100 ka BP. Salt-enhanced subaerial weathering, coupled with a paucity of glacial erratics, made exposure age dating challenging. Rapid subaerial surface lowering in some places means that some exposure ages may underestimate the true age of deglaciation. Despite this uncertainty, the data are consistent with the absence of overriding by a thick ice sheet during the Last Glacial Maximum ,~20-18 ka BP.
    Original languageEnglish
    Pages (from-to)373-382
    Number of pages10
    JournalAntarctic Science
    Volume21
    DOIs
    Publication statusPublished - 2009

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    deglaciation
    weathering
    Antarctica
    salt
    salts
    radiocarbon dating
    last glaciation
    geochemistry
    erratic
    glaciation
    Last Glacial
    Last Glacial Maximum
    ice sheet
    ice
    uncertainty
    rocks
    sediments
    rock
    sediment
    exposure

    Cite this

    Kiernan, K., Gore, D., Fink, D., White, D., McConnell, A., & Sigurdsson, I. (2009). Deglaciation and weathering of Larsemann Hills, East Antarctica. Antarctic Science, 21, 373-382. https://doi.org/10.1017/S0954102009002028
    Kiernan, Kevin ; Gore, Damian ; Fink, David ; White, Duanne ; McConnell, Anne ; Sigurdsson, Ingvar. / Deglaciation and weathering of Larsemann Hills, East Antarctica. In: Antarctic Science. 2009 ; Vol. 21. pp. 373-382.
    @article{3218819cc16d40c3a3ddfe5675aaf61d,
    title = "Deglaciation and weathering of Larsemann Hills, East Antarctica",
    abstract = "In situ cosmogenic 10Be exposure dating, radiocarbon determinations, salt and sediment geochemistry, and rock weathering observations indicate that parts of Larsemann Hills, East Antarctica have been subaerially exposed throughout much of the last glacial cycle, with the last glaciation occurring prior to 100 ka BP. Salt-enhanced subaerial weathering, coupled with a paucity of glacial erratics, made exposure age dating challenging. Rapid subaerial surface lowering in some places means that some exposure ages may underestimate the true age of deglaciation. Despite this uncertainty, the data are consistent with the absence of overriding by a thick ice sheet during the Last Glacial Maximum ,~20-18 ka BP.",
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    author = "Kevin Kiernan and Damian Gore and David Fink and Duanne White and Anne McConnell and Ingvar Sigurdsson",
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    Kiernan, K, Gore, D, Fink, D, White, D, McConnell, A & Sigurdsson, I 2009, 'Deglaciation and weathering of Larsemann Hills, East Antarctica', Antarctic Science, vol. 21, pp. 373-382. https://doi.org/10.1017/S0954102009002028

    Deglaciation and weathering of Larsemann Hills, East Antarctica. / Kiernan, Kevin; Gore, Damian; Fink, David; White, Duanne; McConnell, Anne; Sigurdsson, Ingvar.

    In: Antarctic Science, Vol. 21, 2009, p. 373-382.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Deglaciation and weathering of Larsemann Hills, East Antarctica

    AU - Kiernan, Kevin

    AU - Gore, Damian

    AU - Fink, David

    AU - White, Duanne

    AU - McConnell, Anne

    AU - Sigurdsson, Ingvar

    PY - 2009

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    N2 - In situ cosmogenic 10Be exposure dating, radiocarbon determinations, salt and sediment geochemistry, and rock weathering observations indicate that parts of Larsemann Hills, East Antarctica have been subaerially exposed throughout much of the last glacial cycle, with the last glaciation occurring prior to 100 ka BP. Salt-enhanced subaerial weathering, coupled with a paucity of glacial erratics, made exposure age dating challenging. Rapid subaerial surface lowering in some places means that some exposure ages may underestimate the true age of deglaciation. Despite this uncertainty, the data are consistent with the absence of overriding by a thick ice sheet during the Last Glacial Maximum ,~20-18 ka BP.

    AB - In situ cosmogenic 10Be exposure dating, radiocarbon determinations, salt and sediment geochemistry, and rock weathering observations indicate that parts of Larsemann Hills, East Antarctica have been subaerially exposed throughout much of the last glacial cycle, with the last glaciation occurring prior to 100 ka BP. Salt-enhanced subaerial weathering, coupled with a paucity of glacial erratics, made exposure age dating challenging. Rapid subaerial surface lowering in some places means that some exposure ages may underestimate the true age of deglaciation. Despite this uncertainty, the data are consistent with the absence of overriding by a thick ice sheet during the Last Glacial Maximum ,~20-18 ka BP.

    KW - Broknes

    KW - cosmogenic nuclide exposure age

    KW - mumiyo

    KW - salt geochemistry

    KW - Stornes.

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    DO - 10.1017/S0954102009002028

    M3 - Article

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    SP - 373

    EP - 382

    JO - Antarctic Science

    JF - Antarctic Science

    SN - 0954-1020

    ER -