posted on 2025-03-19, 01:25authored byYujie Guo, Bo LiBo Li, Hailong Zhao
In this study we compared De results obtained from single-aliquot (SA) and single-grain (SG) measurements on potassium rich feldspars (K-feldspars) from the Nihewan Basin, north China, based on the multiple-elevated-temperature post-infrared infrared (MET-pIRIR) stimulated luminescence. Discrepancy was observed between the SA and SG De results. Potential reasons for such discrepancy, including residual doses, sensitivity changes, fading rates, internal dose rates, and/or the combination of these possibilities, were investigated. Our results indicate that the disagreement between the SA and SG De results are mainly caused by the different fading rates and, to a small extent, by the internal K contents variations of different grains. Our study highlights the importance to investigate the relationship of single-grain De values and the luminescence behavior of individual grains, such as brightness. For partial-bleached or post-depositional mixed K-feldspar samples, statistical analysis should be conducted only on the grains with the same fading rate.
Funding
This research was supported by the Doctor Foundation of Hebei Normal University (grant No. L2018830) and the National Natural Science Foundation of China (grant No. 41702192) to Dr. Yujie Guo, and an Australian Research Council Future Fellowship to Bo Li (FT140100384).
Doctor Foundation of Hebei Normal University | L2018830
National Natural Science Foundation of China | 41702192
Australian Research Council | FT140100384
Next-generation luminescence dating techniques for earth and archaeological science applications : Australian Research Council (ARC) | FT140100384