Journal
QUATERNARY GEOCHRONOLOGY
Volume 56, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.quageo.2019.101040
Keywords
K-feldspar; Single grain; Single aliquot; Fading rate; Brightness
Funding
- Doctor Foundation of Hebei Normal University [L2018830]
- National Natural Science Foundation of China [41702192]
- Australian Research Council [FT140100384]
- Australian Research Council [FT140100384] Funding Source: Australian Research Council
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In this study we compared D-e 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 D-e 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 D-e 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 D-e 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.
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