A detailed post‐IR IRSL dating study of the Niuyangzigou loess site in northeastern China

Shuangwen Yi; Jan‐Pieter Buylaert; Andrew S. Murray; Huayu Lu; Christine Thiel; Lin Zeng

doi:10.1111/bor.12185

journal article Jun 15, 2016

A detailed post‐IR IRSL dating study of the Niuyangzigou loess site in northeastern China

Shuangwen Yi Jan‐Pieter Buylaert Andrew S. Murray Huayu Lu

Christine Thiel Lin Zeng

Boreas Vol. 45 No. 4 pp. 644-657 · Wiley

View at Publisher Save 10.1111/bor.12185

Abstract

In this study, we report standard quartz SAR OSL and post‐IR infrared (IR) stimulated luminescence (post‐IR IRSL; pIRIR290) measurements made on sand‐sized quartz and K‐feldspar extracts from the loess‐palaeosol sequence at Niuyangzigou in northeastern China. The quartz OSL characteristics are satisfactory. Extensive pIRIR50,290 dose recovery tests were performed by adding doses on top of the natural dose. We found that dose recovery ratios improve significantly when the test dose ranges between ~15 and ~80% of the total dose, and good dose recovery (within ±5% of unity) can be obtained up to ∼800 Gy. Otherwise, the dose recovery ratio deviates from unity. The De values also depend on the test dose size and so we conclude that the effect of test dose size should be routinely considered in pIRIR dating. First IR stimulation plateau pIRIR290 results are compared with multiple elevated temperature ‐pIRIR (MET‐pIRIR) data. It appears that the low temperature MET‐pIRIR data are strongly affected by poor dose recovery, but this is not the case for the pIRIR290 results. Natural signal measurements at the highest (first IR) stimulation temperature on a sample expected to be in field saturation suggest that ~10% signal loss occurs in pIRIR signals. Long‐term laboratory bleaching experiments (>80 days) show that a constant (or very difficult to bleach) residual pIRIR290 signal is reached after ~300 h, corresponding to a dose of 6.2±0.7 Gy. Quartz OSL and feldspar pIRIR50,290 ages are in good agreement at least back to c. 70 ka. Beyond this the quartz ages begin to underestimate but the feldspar ages are in agreement with the expected Last Interglacial age palaeosol.

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References

Details

Published: Jun 15, 2016
Vol/Issue: 45(4)
Pages: 644-657
License: View

Authors

S

Shuangwen Yi

School of Geographic and Oceanographic Sciences Nanjing University Nanjing 210023 China

J

Jan‐Pieter Buylaert

Nordic Laboratory for Luminescence Dating Department of Geoscience Aarhus University Risø Campus DK‐4000 Roskilde Denmark; Center for Nuclear Technologies Technical University of Denmark Risø Campus DK‐4000 Roskilde Denmark

A

Andrew S. Murray

Nordic Laboratory for Luminescence Dating Department of Geoscience Aarhus University Risø Campus DK‐4000 Roskilde Denmark

H

Huayu Lu

School of Geographic and Oceanographic Sciences Nanjing University Nanjing 210023 China

C

Christine Thiel

Leibniz Institute for Applied Geophysics, S3: Geochronology and Isotope Hydrology Stilleweg 2 D‐30655 Hannover Germany

L

Lin Zeng

School of Geographic and Oceanographic Sciences Nanjing University Nanjing 210023 China

Funding

National Natural Science Foundation of China Award: 41371203

Cite This Article

Shuangwen Yi, Jan‐Pieter Buylaert, Andrew S. Murray, et al. (2016). A detailed post‐IR IRSL dating study of the Niuyangzigou loess site in northeastern China. Boreas, 45(4), 644-657. https://doi.org/10.1111/bor.12185

A detailed post‐IR IRSL dating study of the Niuyangzigou loess site in northeastern China

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