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Multi-Method Luminescence Dating of Old Fluvial Sediments from Northern Tian Shan, China Cover

Multi-Method Luminescence Dating of Old Fluvial Sediments from Northern Tian Shan, China

Open Access
|Dec 2021

Figures & Tables

Fig. 1

Sampling site at the eastern tip of Anjihai anticline and the lithology. a) Google Earth image of the Anjihai anticline. The black square marks the location of the strata for sampling. The inset is a topographic profile of the eastern tip Anjihai anticline with the sample location; photos shown in b) and c) are the close look of the sampling site and strata.

Fig. 2

Typical luminescence decay curves and growth curves of the K-feldspar single grain pIRIR and MAR-MET-pIRIR signals. a) and b) are the decay curve and growth curve of single grain pIRIR225 signal, respectively; c) and d) are the decay curve and growth curve of single grain pIRIR290 signal, respectively; e) MAR-MET-pIRIR decay curves; f) typical growth curves of MAR-MET-pIRIR290 signals. Black line\squares show the growth curve with a test dose of 104 Gy. Red line and triangles show the growth curve with a test dose of 415 Gy.

Fig. 3

The frequency distribution of thermal transfer ratios for single grain pIRIR225 and pIRIR290 signals with different test doses. a) and b) pIRIR225 signal with a test dose of 31Gy and 93 Gy, respectively; c) and d) pIRIR290 signal with a test dose 31 Gy and 93 Gy, respectively.

Fig. 4

The dependence of thermal transfer ratios on the test dose. The thermal transfer ratio is evaluated with a test dose of ∼103 Gy, ∼415 Gy and ∼622 Gy for MAR-MET-pIRIR signals, respectively.

Fig. 5

The abanico plots of dose recovery results with a given dose of ∼556 Gy and test dose ∼93 Gy for single grain pIRIR225 and single grain pIRIR290 procedures. The solid line show the range between 0.9 and 1.1, while the dashed line show the range between 0.8 and 1.2.

Fig. 6

The abanico plot of De distribution for single grain pIRIR225 and single grain pIRIR290 procedures with a test dose of 93 Gy. MAM De was calculated with sigmab of 0.13 and 0.36 for pIRIR225 and pIRIR290 signals, respectively.

Fig. 7

Kernel density estimate of MAR-MET-pIRIR290 De values. De distributions measured with test dose of ∼415 Gy and ∼104 Gy are shown in a) and b), respectively.

Fig. 8

Dependence of MAR-MET-pIRIR De values on stimulation temperature. a) with a test dose of 415 Gy; b) with a test dose of 104 Gy.

Fig. 9

Dependence of K-feldspar single grain De value on the pIRIR sensitivity (response to a test dose of 93 Gy) a) pIRIR225 and c) pIRIR290 signals. The solid line is linear fit and the dashed line is the 95% confidence band. The dependence of CAM De and OD on the lowest pIRIR sensitivity employed to screen the K-feldspar for analysis are shown in b) and d).

Fig. 10

Comparison of De values obtained by the single grain pIRIR procedures and MAR-MET-pIRIR290 procedures. Various statistical models were applied to the measured De values. The D0 and 2·D0 values are shown for MAR-MET-pIRIR290 procedures with test doses of 104 Gy and 415 Gy, respectively. The shaded region shows the whole range of De values measured with different procedures.

The statistics of De values_

Test dose (Gy)MAM (Gy)CAM (Gy)Median (Gy)Mean (Gy)OD (%)n/N1
SG pIRIR22593269±12445±1346845636±2170/400
SG pIRIR29093425±43476±1950049638±3116/400
MAR-pIRIR2902104762±40872±2188888615±259/60
MAR-pIRIR2902415811±44977±27968100717±256/58

Single-grain pIRIR and multiple-aliquot MET-pIRIR measurements procedures_

StepsSingle grain pIRIR225Single grain pIRIR290MAR-MET-pIRIR290
1Natural or regenerative dose DiNatural or regenerative dose DiNatural or regenerative dose Di
2PH at 250°C for 60 sPH at 320°C for 60 sPH at 320°C for 60 s
3IR laser @ 50°C for 1.2 sIR laser @ 50°C for 1.2 sIRLED @ 50°C for 100 s
4IR laser @ 225°C for 1.2 sIR laser @ 290°C for 1.2 sIRLED @ 100°C for 100 s
5IRLED @ 225°C for 100 sIRLED @ 290°C for 100 sIRLED @ 150°C for 100 s
6Test doseTest doseIRLED @ 200°C for 100 s
7PH at 250°C for 60 sPH at 320°C for 60 sIRLED @ 250°C for 100 s
8IR laser @ 50°C for 1.2 sIR laser @ 50°C for 1.2 sIRLED @ 290°C for 100 s
9IR laser @ 225°C for 1.2 sIR laser @ 290°C for 1.2 sTest dose
10IRLED @ 290°C for 100 sIRLED @ 325°C for 100 sPH at 320°C for 60 s
11Return to step1Return to step1IRLED @ 50°C for 100 s
12 IRLED @ 100°C for 100 s
13 IRLED @ 150°C for 100 s
14 IRLED @ 200°C for 100 s
15 IRLED @ 250°C for 100 s
16 IRLED @ 290°C for 100 s
17 Solar simulator bleach for 4 hrs
18 Normalization dose Dr
19 Run steps 2-16
20 Return to step1
Language: English
Page range: 339 - 350
Submitted on: Feb 15, 2019
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Accepted on: Nov 7, 2019
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Published on: Dec 31, 2021
Published by: Sciendo
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year

© 2021 Kechang Li, Jintang Qin, Jie Chen, Jun Shen, Sheng-Hua Li, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.