Zeroing of the osl signal as a function of grain size: investigating bleaching and thermal transfer for a young fluvial sample

• Autorzy: Truelsen J. L. , Wallinga J.
• Języki publikacji: EN

Abstrakty

EN

Previous studies have indicated that the OSL signal from coarser grain-size fractions might be more completely reset during fluvial transport. In this study we investigate whether this feature is real, or rather an artefact of thermal transfer effects that might affect finer grains more due to smaller thermal lag during heat treatment. Our experimental results obtained on three grain-size fractions (90-125, 180-212 and 425-500 mm) clearly show that better bleaching of coarser grains is not caused by differences in thermal transfer. On the basis of our results we advise selecting a coarse grain size for analysis when dating young fluvial deposits.

Słowa kluczowe

EN

optical dating; grain size; quartz; poor bleaching; fluvial

• Wydawca: De Gruyter
• Czasopismo: Geochronometria
• Rocznik: 2003
• Tom: Vol. 22
• Strony: 1--8
• Opis fizyczny: Bibliogr. 18 poz., rys., tab.

Twórcy

autor

Truelsen J. L.

• The Nordic Laboratory for Luminescence Dating, Department of Earth Sciences, Aarhus University, Riso National Laboratory, DK-4000 Roskilde, Denmark

autor

Wallinga J.

• Netherlands Centre for Luminescence dating, Delft University of Technology, Interfaculty Reactor Institute, Mekelweg 15, NL-2629 JB, Delft, The Netherlands

Bibliografia

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