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Timing of Holocene Lake Highstand in Jinchang Paleolake from the Northeast Tibetan Plateau Foreland

Hao Long
Hao Long
, 
Hongyi Cheng
Hongyi Cheng
, 
Linhai Yang
Linhai Yang
, 
Lei Gao
Lei Gao
 e 
Qian Liu
Qian Liu
   | 31 dic 2021
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Pubblicato online: 31 dic 2021
Pagine: 253 - 262
Ricevuto: 20 gen 2019
Accettato: 11 mar 2020
DOI: https://doi.org/10.2478/geochr-2020-0004
Parole chiave
© 2019 Hao Long et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

Map showing the location of Jinchang paleolake (star) and other sites (Baijian Lake, Tegger Desert, Mu us Desert, Otindag Desert and Horqin Desert) mentioned in this study. EAM denotes East Asian monsoon, and its northern limit is shown by the blue dashed line (inset).
Map showing the location of Jinchang paleolake (star) and other sites (Baijian Lake, Tegger Desert, Mu us Desert, Otindag Desert and Horqin Desert) mentioned in this study. EAM denotes East Asian monsoon, and its northern limit is shown by the blue dashed line (inset).

Fig. 2

Photos of outcrop sampled for luminescence and radiocarbon dating.
Photos of outcrop sampled for luminescence and radiocarbon dating.

Fig. 3

Preheat temperature plateau tests for quartz samples: NL-579 (a), NL-580 (b), and NL-581 (c).
Preheat temperature plateau tests for quartz samples: NL-579 (a), NL-580 (b), and NL-581 (c).

Fig. 4

Histogram summarizing dose recovery ratios for three quartz samples.
Histogram summarizing dose recovery ratios for three quartz samples.

Fig. 5

(a) The normalized OSL decay curve of sample NL-579 was decomposed into three components, i.e., fast, medium and slow plus BG; (b) the relative contribution of the three components are plotted against stimulation time; decay curves and growth curves of K-feldspar pIRIR150 (c) and pIRIR225 (d) signals for sample NL-579.
(a) The normalized OSL decay curve of sample NL-579 was decomposed into three components, i.e., fast, medium and slow plus BG; (b) the relative contribution of the three components are plotted against stimulation time; decay curves and growth curves of K-feldspar pIRIR150 (c) and pIRIR225 (d) signals for sample NL-579.

Fig. 6

De distribution of quartz OSL for three samples.
De distribution of quartz OSL for three samples.

Fig. 7

(a) Dose recovery tests and (b) residual test on K-feldspar pIRIR150 (black) and pIRIR225 (red) signals; (c) fading rates of K-feldspar pIRIR150 (black) and pIRIR225 (red) signals; (d) fading rates of IRSL50 signals measured by pIRIR150 (black) and pIRIR225 protocols.
(a) Dose recovery tests and (b) residual test on K-feldspar pIRIR150 (black) and pIRIR225 (red) signals; (c) fading rates of K-feldspar pIRIR150 (black) and pIRIR225 (red) signals; (d) fading rates of IRSL50 signals measured by pIRIR150 (black) and pIRIR225 protocols.

Fig. 8

All luminescence and 14C ages demonstrated together with the lithological log of JC section.
All luminescence and 14C ages demonstrated together with the lithological log of JC section.

Luminescence dating results for three samples.

Sample ID Depth (m) U (ppm) Th (ppm) K (%) Luminescence signals Total dose rate (Gy/ka) De (Gy) Age (ka)
NL-579 3.2 2.88 ± 0.11 4.30 ± 0.16 2.13 ± 0.06 Qz OSL 2.82 ± 0.20 22.1 ± 1.0 7.8 ± 0.7
K-feldspar pIRIR150 3.63 ± 0.22 28.7 ± 0.7 7.9 ± 0.5
K-feldspar pIRIR225 3.63 ± 0.22 26.9 ± 0.4 7.4 ± 0.5
NL-580 1.7 2.13 ± 0.09 4.21 ± 0.16 1.87 ± 0.06 Qz OSL 2.48 ± 0.17 18.4 ± 0.6 7.4 ± 0.6
K-feldspar pIRIR150 3.26 ± 0.21 24.4 ± 0.1 7.5 ± 0.5
K-feldspar pIRIR225 3.26 ± 0.21 24.4 ± 0.6 7.5 ± 0.5
NL-581 1.0 3.52 ± 0.12 8.02 ± 0.25 1.76 ± 0.06 Qz OSL 2.91 ± 0.19 22.2 ± 0.7 7.6 ± 0.6
K-feldspar pIRIR150 3.76 ± 0.23 28.7 ± 0.3 7.6 ± 0.5
K-feldspar pIRIR225 3.76 ± 0.23 27.9 ± 0.3 7.4 ± 0.5

14C dating results of three samples.

Sample ID Lab ID Dating material 14C ages Calibrated ages (Cal a BP) (one Sigma)
JC-1 NZA57145 Shells 6868±26 7668–7764
JC-2 NZA47526 Shells 7426±139 8156–8383
JC-3 NZA57104 Charcoals 7189±29 7971–8013
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