Validating post IR-IRSL dating on K-feldspars through comparison with quartz OSL ages |
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| Institution: | 1. Netherlands Centre for Luminescence dating, Delft University of Technology, Mekelweg 15, 2629 JB Delft, The Netherlands;2. TNO Built Environment and Geosciences – Geological Survey of the Netherlands, Utrecht, The Netherlands;1. Center for Nuclear Technologies, Technical University of Denmark, DTU Risø Campus, Denmark;2. Nordic Laboratory for Luminescence Dating, Department of Geoscience, Aarhus University, Risø Campus, DK-4000, Roskilde, Denmark;1. School of Geography and Tourism, Jiaying University, Meizhou 514015, China;2. Department of Geography and Earth Sciences, Aberystwyth University, Ceredigion SY23 3DB, UK;3. School of Geographical Science, South China Normal University, Guangzhou 510631, China;4. State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China;5. Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China;1. Institute for Geology, University of Innsbruck, 6020, Austria;2. ARC Centre of Excellence for Australian Biodiversity and Heritage, GeoQuest Research Centre, University of Wollongong, 2500, Australia;1. Center for Nuclear Technologies, Technical University of Denmark, DTU Risø Campus, DK-4000 Roskilde, Denmark;2. Institut de Recherche sur les Archéomatériaux, UMR 5060 CNRS – Université de Bordeaux, Centre de Recherche en Physique Appliquée à l''Archéologie (CRP2A), Esplanade des Antilles, Maison de l''archéologie, 33607 Pessac Cedex, France;3. Nordic Laboratory for Luminescence Dating, Department of Geoscience, Aarhus University, DTUNutech, Risø Campus, DK-4000 Roskilde, Denmark;1. Department of Earth Sciences, ETH-Zurich, 8092 Zurich, Switzerland;2. Centre for Archaeological Science, School of Earth and Environmental Sciences, University of Wollongong, Wollongong, NSW 2522, Australia;3. Centre for Nuclear Technologies, Technical University of Denmark, DTU Risø Campus, DK 4000 Roskilde, Denmark;4. Raymond and Beverly Sackler School of Physics and Astronomy, Tel-Aviv University, 69978 Tel-Aviv, Israel;5. University of Abertay, Dundee DD1 1HG, UK;6. Nordic Laboratory for Luminescence Dating, Department of Geoscience, Aarhus University, DTU Risø Campus, Denmark;7. Department of Earth Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China;8. Physics Department, McDaniel College, Westminster, MD 21157, USA;9. Institute of Earth Surface Dynamics, University of Lausanne, Geopolis, 1015 Lausanne, Switzerland;1. Department of Chemical and Geological Sciences, University of Cagliari, Cagliari, Italy;2. Nordic Laboratory for Luminescence Dating, Department of Geoscience, University of Aarhus, DTU Risø Campus, Roskilde, Denmark;3. Center for Nuclear Technologies, Technical University of Denmark, Risø Campus, Denmark;4. Institute for Biometeorology, National Research Council of Italy, Sassari, Italy;5. Department of Architecture, Design and Planning, University of Sassari, Sassari, Italy;6. CNR-Institute of Geosciences and Earth Resources, CNR, Via Moruzzi 1, 56124 Pisa, Italy |
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| Abstract: | Recent developments have opened up the possibilities of using potassium feldspar for dating Pleistocene sediments; a stable (less-fading) part of the infrared stimulated luminescence (IRSL) signal can be selected by largely depleting the unstable part of the IR signal, using a combination of thermal and IR stimulation: post IR-IRSL dating (pIR-IRSL).This study aims to test the validity of pIR-IRSL dating on feldspars. We obtained pIR-IRSL ages on a large suite of samples from several locations in the Netherlands area, covering a wide range of depositional environments and ages. Age control was provided by quartz optically stimulated luminescence (OSL) ages on the same samples; these ages were shown to accord with geological age constraints. Comparison with IRSL ages enabled us to evaluate the improvement that pIR-IRSL dating provides over conventional IRSL methods.The majority of feldspar ages obtained with pIR-IRSL showed good agreement with both the quartz OSL ages and the geological age constraints. Our study demonstrates that pIR-IRSL dating is more robust than conventional IRSL and should be the method of choice in feldspar luminescence dating of Pleistocene sediments. |
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