|Title||Validating post IR-IRSL dating on K-feldspars through comparison with quartz OSL ages|
|Author(s)||Kars, R.H.; Busschers, F.S.; Wallinga, J.|
|Source||Quaternary Geochronology 12 (2012). - ISSN 1871-1014 - p. 74 - 86.|
|Publication type||Refereed Article in a scientific journal|
|Keyword(s)||Feldspar - Luminescence dating - OSL - Post IR-IRSL - Quaternary - Sediments|
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.