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

Kechang Li
Kechang Li
, 
Jintang Qin
Jintang Qin
, 
Jie Chen
Jie Chen
, 
Jun Shen
Jun Shen
 y 
Sheng-Hua Li
Sheng-Hua Li
   | 31 dic 2021
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Publicado en línea: 31 dic 2021
Páginas: 339 - 350
Recibido: 15 feb 2019
Aceptado: 07 nov 2019
DOI: https://doi.org/10.2478/geochr-2020-0014
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© 2019 Kechang Li et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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.
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.
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.
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.
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.
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.
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.
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.
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).
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.
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 pIRIR225 93 269±12 445±13 468 456 36±2 170/400
SG pIRIR290 93 425±43 476±19 500 496 38±3 116/400
MAR-pIRIR2902 104 762±40 872±21 888 886 15±2 59/60
MAR-pIRIR2902 415 811±44 977±27 968 1007 17±2 56/58

Single-grain pIRIR and multiple-aliquot MET-pIRIR measurements procedures.

Steps Single grain pIRIR225 Single grain pIRIR290 MAR-MET-pIRIR290
1 Natural or regenerative dose Di Natural or regenerative dose Di Natural or regenerative dose Di
2 PH at 250°C for 60 s PH at 320°C for 60 s PH at 320°C for 60 s
3 IR laser @ 50°C for 1.2 s IR laser @ 50°C for 1.2 s IRLED @ 50°C for 100 s
4 IR laser @ 225°C for 1.2 s IR laser @ 290°C for 1.2 s IRLED @ 100°C for 100 s
5 IRLED @ 225°C for 100 s IRLED @ 290°C for 100 s IRLED @ 150°C for 100 s
6 Test dose Test dose IRLED @ 200°C for 100 s
7 PH at 250°C for 60 s PH at 320°C for 60 s IRLED @ 250°C for 100 s
8 IR laser @ 50°C for 1.2 s IR laser @ 50°C for 1.2 s IRLED @ 290°C for 100 s
9 IR laser @ 225°C for 1.2 s IR laser @ 290°C for 1.2 s Test dose
10 IRLED @ 290°C for 100 s IRLED @ 325°C for 100 s PH at 320°C for 60 s
11 Return to step1 Return to step1 IRLED @ 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
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