Optical dating of young tidal sediments in the Danish Wadden Sea

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Anni Tindahl Madsen, A. S. Murray, Thorbjørn Joest Andersen, Morten Pejrup

 We have tested the applicability of optically stimulated luminescence (OSL) to the dating of young estuarine sediments (<1000 years) to determine whether this method can be used to complement and support existing techniques, such as 210Pb dating. The degree of bleaching before deposition is investigated by examining the age trend in various sediment cores, and where possible, by comparison with independent age control provided by 210Pb dating. The consistency between optical ages and 210Pb ages is shown to be satisfactory on a time-scale down to only a few years.
We conclude that OSL provides reliable and reproducible results in cores from sub-, inter- and supra-tidal sediments, ranging from only a few years up to ~1000 years old, confirming its value in the estimation of estuarine accretion rates. With OSL it is, for the first time, possible to date sediment cores from silty and sandy tidal flats, providing a new approach to the problem of evaluation of stability and calculation of sediment budgets for estuaries and coastal lagoons.
Original languageEnglish
JournalQuaternary Geochronology
Volume2
Issue number1-4
Pages (from-to)89-94
ISSN1871-1014
DOIs
Publication statusPublished - 2007

    Research areas

  • The Faculty of Science - OSL, Denmark, wadden sea, Salt marsh, Tidal mudflats, Quartz, 210Pb dating

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