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Comparison of single-aliquot and single-grain MET-pIRIR De results for potassium feldspar samples from the Nihewan Basin, northen China

Journal Article


Abstract


  • © 2019 Elsevier B.V. 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.

UOW Authors


  •   Guo, Yujie (external author)
  •   Li, Bo
  •   Zhao, Hailong (external author)

Publication Date


  • 2020

Citation


  • Guo, Y., Li, B. & Zhao, H. (2020). Comparison of single-aliquot and single-grain MET-pIRIR De results for potassium feldspar samples from the Nihewan Basin, northen China. Quaternary Geochronology, 56

Scopus Eid


  • 2-s2.0-85075791078

Volume


  • 56

Place Of Publication


  • Netherlands

Abstract


  • © 2019 Elsevier B.V. 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.

UOW Authors


  •   Guo, Yujie (external author)
  •   Li, Bo
  •   Zhao, Hailong (external author)

Publication Date


  • 2020

Citation


  • Guo, Y., Li, B. & Zhao, H. (2020). Comparison of single-aliquot and single-grain MET-pIRIR De results for potassium feldspar samples from the Nihewan Basin, northen China. Quaternary Geochronology, 56

Scopus Eid


  • 2-s2.0-85075791078

Volume


  • 56

Place Of Publication


  • Netherlands