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Luminescence Dating of Lacustrine Sediments from Cuoe Lake on the Central Tibetan Plateau

Yandong Hou
Yandong Hou
, 
Hao Long
Hao Long
, 
Lei Gao
Lei Gao
 and 
Ji Shen
Ji Shen
   | Dec 31, 2021
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Published Online: Dec 31, 2021
Page range: 304 - 312
Received: Jan 16, 2019
Accepted: Mar 02, 2020
DOI: https://doi.org/10.2478/geochr-2020-0002
Keywords
© 2019 Yandong Hou et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

(a) Map showing the distibution of major rivers flowing to Selin Co and Google Earth satellite image showing the locations of Selin Co and Cuoe lake (inset); (b) Location of CE1 profile. The base map in (a) and (b) were obtained from http://www.gscloud.cn/.
(a) Map showing the distibution of major rivers flowing to Selin Co and Google Earth satellite image showing the locations of Selin Co and Cuoe lake (inset); (b) Location of CE1 profile. The base map in (a) and (b) were obtained from http://www.gscloud.cn/.

Fig. 2

Photo and sedimentary log of section CE1.
Photo and sedimentary log of section CE1.

Fig. 3

(a) The example decay showing very low natural quartz OSL signals; (b) Typical IRSL and pIRIR decay curves of K-feldspar of sample NL-1457.
(a) The example decay showing very low natural quartz OSL signals; (b) Typical IRSL and pIRIR decay curves of K-feldspar of sample NL-1457.

Fig. 4

(a) Fading rate (g-value) of CG quartz for a representative aliquot (NL-1456); (b) Summary of g-values of 24 aliquots from all samples; (c) The g-value determination for standard quartz sample; (d) Summary of g-values of standard quartz samples.
(a) Fading rate (g-value) of CG quartz for a representative aliquot (NL-1456); (b) Summary of g-values of 24 aliquots from all samples; (c) The g-value determination for standard quartz sample; (d) Summary of g-values of standard quartz samples.

Fig. 5

Histograms summarizing the recycling ratios (a) and recuperation values (b) of pIRIR150 measurements; Dose recovery ratio (c) and residual dose (d) on pIRIR150 signal for the six samples.
Histograms summarizing the recycling ratios (a) and recuperation values (b) of pIRIR150 measurements; Dose recovery ratio (c) and residual dose (d) on pIRIR150 signal for the six samples.

Fig. 6

A g-value determination of CG K-feldspar pIRIR150 in (a) and IRSL50 in (b) signals for a representative aliquots; Histogram summarizing pIRIR150 in (c) and IRSL50 (d) fading rates for all six samples (four aliquots for each sample).
A g-value determination of CG K-feldspar pIRIR150 in (a) and IRSL50 in (b) signals for a representative aliquots; Histogram summarizing pIRIR150 in (c) and IRSL50 (d) fading rates for all six samples (four aliquots for each sample).

Fig. 7

Comparison between mean Des of IRSL50 and pIRIR150 signals for six samples.
Comparison between mean Des of IRSL50 and pIRIR150 signals for six samples.

Protocol used to measure pIRIR150.

Step Treatment Observed
1 Dose
2 Preheat at 180°C for 60 s
3 IRSL measurement at 50°C for 100 s Lx1
4 IRSL measurement at 150°C for 200 s Lx2
5 Test dose
6 Preheat at 180°C for 60 s
7 IRSL measurement at 50°C for 100 s Tx1
8 IRSL measurement at 150°C for 200 s Lx2
9 Return to step 1

Luminescence dating results for six samples from CE1 profile.

Section name Sample ID Depth (cm) U (ppm) Th (ppm) K (%) Water Content (%) Cosmic dose rate (Gy/ka) Total dose rate(Gy/ka) De (Gy) Age (ka)
CE1 NL-1456 40 2.63±0.10 9.81±0.28 1.59±0.05 4.16±10 0.42±0.04 3.92±0.25 0.45±0.04 0.1±0.01
NL-1457 90 2.1±0.09 7.02±0.22 1.00±0.04 10.70±10 0.39±0.04 3.72±0.26 29.70±0.2 7.9±0.5
NL-1458 150 3.89±0.14 9.58±0.28 1.44±0.05 10.86±10 0.36±0.04 4.08±0.26 33.23±0.4 8.0±0.5
NL-1459 170 5.87±0.21 6.85±0.23 1.03±0.04 30.74±10 0.35±0.04 3.56±0.25 27.49±0.6 7. 6±0.6
NL-1460 210 6.67±0.21 6.2±0.20 0.85±0.04 29.88±10 0.33±0.03 3.52±0.26 25.13±0.2 7.1±0.5
NL-1461 245 2.71±0.11 9.45±0.27 1.61±0.05 2.48±10 0.32±0.03 3.68±0.24 34.69±0.3 9.4±0.6

Summary of the AMS 14C ages.

Sample ID Depth (cm) Material Radiocarbon Age (a BP) Calibrated Radiocarbon age (cal ka BP)
Beta-471695 162 shell 13060±30 15.6±0.1
Beta-471698 0 shell 1320±30 1.3±0.04
eISSN:
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Language:
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Journal Subjects:
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