A luminescence dating intercomparison based on a Danish beach-ridge sand

Andrew Murray, Jan-Pieter Buylaert, Christine Thiel

    Research output: Contribution to journalConference articleResearchpeer-review

    Abstract

    There is a need for large scale intercomparisons to determine the degree of coherence of luminescence dating measurements made by different laboratories. Here we describe results from a laboratory intercomparison sample based on a quartz-rich aeolian and/or coastal marine sand ridge from the Skagen peninsula, northern Jutland (Denmark). About 200 kg of sand was sampled at night from a single beach ridge. The sand was homogenised using a cement mixer and packed in ~700 moisture and light-tight bags for distribution. The quartz luminescence characteristics are satisfactory (e.g. fast-component dominated and good dose recovery) and our own equivalent dose determinations and measurements of radionuclide concentrations for twenty of these bags demonstrate the degree of homogenisation. One natural sample and one sample of pre-processed quartz was made available on request; analysis of all the responses gives a mean dose (pre-processed quartz) of 4.58 Gy, σ ¼ 0.40 (n ¼ 26), to be compared to the mean dose (self-extracted quartz) of 4.52 Gy, σ ¼ 0.55 (n ¼ 21). The mean age is 3.99 ± 0.14 ka, σ ¼ 0.71 (n ¼ 22), i.e. a relative standard deviation of 18%.We present an analysis of all the important quantitative and qualitative responses we received between 2007 and 2012 and discuss the implications for our dating community and for users of luminescence ages. © 2015 Elsevier Ltd. All rights reserved.
    Original languageEnglish
    JournalRadiation Measurements
    Volume81
    Pages (from-to)32–38
    ISSN1350-4487
    DOIs
    Publication statusPublished - 2015
    Event14th International Conference on Luminescence and Electron Spin Resonance Dating - Montréal, Canada
    Duration: 7 Jul 201511 Jul 2015
    Conference number: 14

    Conference

    Conference14th International Conference on Luminescence and Electron Spin Resonance Dating
    Number14
    CountryCanada
    CityMontréal
    Period07/07/201511/07/2015

    Keywords

    • OSL dating
    • Intercomparison
    • Equivalent dose
    • Dose rate
    • Radionuclide analysis

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