Quartz OSL and K-feldspar post-IR IRSL dating of sand accumulation in the Lower Liao Plain (Liaoning, NE China)

Yan Li; Sumiko Tsukamoto; Ke Hu; Manfred Frechen

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Quartz OSL and K-feldspar post-IR IRSL dating of sand accumulation in the Lower Liao Plain (Liaoning, NE China)

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| Mar 26, 2017

Volume 44 (2017): Issue 1 (January 2017)

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Page range: 1 - 15

Received: Sep 30, 2016

Accepted: Jan 23, 2017

DOI: https://doi.org/10.1515/geochr-2015-0051

Keywords
optically stimulated luminescence (OSL) dating, sand accumulation, the Lower Liao Plain, K-feldspar post-IR IRSL, Holocene

© 2016 Y. Li.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

(A) The location of the study area in NE China. (B) Map showing the geological setting (Lower Liao River plain, local drainage streams and adjacent mountain areas) and coastline changes (sea level in Holocene, coastlines in 1905 AD, 1932 AD, 1950 AD and present, Fu, 1988; Chen et al., 2010). The location of the sampling site is also shown. (C)–(E) Typical sand deposits in the LLP. (C) is a photo of studied PJ sand dune.

Fig. 2

(A) Investigated profile and its description. The positions of OSL samples are shown in the profile. (B) Stratigraphy of the PJ dune showing the positions of four investigated sections and sampling depths.

Results of quartz OSL pre-tests. (A) Measured/given ratio (dose recovery test), (B) equivalent dose and (C) thermal transfer at different preheat temperatures for sample LUM3192. (D)–(F) show the results of the same set of tests for sample LUM3196.

Quartz decay curve, dose response curve and De distribution for sample LUM3191–(A) and (B); for sample LUM3196–(C) and (D). De distributions are presented using abanico plots (Dietze et al., 2016).

K-feldspar IR50 and pIRIR150 decay curve, growth curve and De distribution for sample LUM3191–(A) and (B), for sample LUM3196–(C) and (D).

Dose recovery ratio and residual dose for IR50 and pIRIR150 for each sample.

Fading rate (g2ays-value) of IR50 and pIRIR150 signals for one representative sample LUM3191.

Ages from different luminescence signals and the comparison of the predicted and measured residual doses. A shows the comparison for the sand samples, B shows the comparison for two sandy soil samples. C demonstrates the comparison of the predicted residual dose and measured dose for all samples (See details in text).

Depth-age relationship of the PJ sand dune and sandy soil layer with a graphic log and all sample codes.

Comparison of different proxies. (A) The precipitation variations in northern China revealed by the δ18O data from the Shihua Cave stalagmites record (Li et al., 1998; orange solid line). (B) Temperature change in Liaoning Province (Sun and Zhao, 2002; green solid line). (C) Population change in Northeastern China from 1812 to 1911 AD (blue solid line) summarized by Zhao (2004). (D) Quartz OSL ages for the sand deposits.

SAR protocol applied for equivalent dose determination.

Step	Quartz OSL		K-feldspar post-IR IRSL₁₅₀

	Treatment	Observed	Step	Treatment	Observed
1	Give dose For a natural sample, i=0 and D₀ is the natural dose. , D_i		1	Give dose
2	Preheat for 60 s at 180°C		2	Preheat for 60 s at 180°C
3	IR stimulation Additional recycling step with IR stimulation was added to calculate OSL IR depletion ratio. for 40 s at 0°C		3	IR stimulation for 100 s at 50°C
4	Stimulation for 40 s at 125°C	L_n, L_i	4	IR stimulation for 200 s at 150°C	L_n, L_i
5	Give test dose, D_t		5	Test dose, D_t
6	Heat to 160°C		6	Preheat for 60 s at 180°C
7	Stimulate for 40 s at 125°C	T_n, T_i	7	IR stimulation for 100 s at 50°C
8	Return to 1		8	IR stimulation for 200 s at 150°C Return to 1	T_n, T_i
			9	Return to 1

Dose rate determination

SampleID	Depth (cm)	Grain size Interval (μm)	U (ppm)	Th (ppm)	K (%)	Water content (%) The water contents are presented as “Estimated water content with uncertainty (Observed water content)”.	Dose rate(Gy/ka)

							K-feldspar	quartz
LUM3197	80	100–150	0.96 ± 0.06	2.63 ± 0.14	2.85 ± 0.14	6 ± 4 (1.7)	4.02 ± 0.17	3.24 ± 0.24
LUM3198	149	100–150	1.06 ± 0.06	2.82 ± 0.15	2.91 ± 0.15	6 ± 4 (2.1)	4.10 ± 0.17	3.31 ± 0.24
LUM3191	380	100–150	1.00 ± 0.05	2.66 ± 0.14	2.79 ± 0.14	6 ± 4 (2.6)	3.96 ± 0.17	3.13 ± 0.23
LUM3192	434	100–150	0.91 ± 0.05	2.72 ± 0.14	2.83 ± 0.14	6 ± 4 (4.2)	3.92 ± 0.16	3.15 ± 0.24
LUM3193	462	100–150	1.13 ± 0.06	3.27 ± 0.17	2.87 ± 0.14	6 ± 4 (6.6)	4.05 ± 0.17	3.26 ± 0.24
LUM3194	480	100–150	1.31 ± 0.07	4.30 ± 0.22	2.82 ± 014	6 ± 4 (9.5)	4.12 ± 0.17	3.32 ± 0.24
LUM3195	511	63–100	1.88 ± 0.10	6.95 ± 0.35	2.61 ± 0.13	13 ± 3 (14)	4.14 ± 0.17	3.20 ± 0.22
LUM3196	532	63–100	2.24 ± 0.12	8.01 ± 0.41	2.34 ± 0.12	13 ± 3 (15)	4.07 ± 0.17	3.10 ± 0.20

Summary of predicted residual dose and measured residual dose (4 h SOL2 bleaching).

Sample	pIRIR₁₅₀		IR₅₀

	Predicted	Measured	Predicted	Measured
	residual	residual	residual	residual
3197	0.48 ± 0.07	0.13 ± 0.02	0.00 ± 0.06	0.03 ± 0.00
3198	0.57 ± 0.08	0.16 ± 0.02	0.14 ± 0.06	0.04 ± 0.01
3191	0.26 ± 0.06	0.09 ± 0.01	0.12 ± 0.05	0.03 ± 0.01
3192	0.32 ± 0.06	0.11 ± 0.01	0.12 ± 0.04	0.04 ± 0.00
3193	0.21 ± 0.06	0.07 ± 0.01	0.11 ± 0.05	0.04 ± 0.02
3194	0.09 ± 0.09	0.05 ± 0.01	0.12 ± 0.07	0.02 ± 0.00
3195	-0.19 ± 0.06	0.11 ± 0.01	-0.18 ± 0.06	0.03 ± 0.00
3196	2.91 ± 0.09	0.34 ± 0.02	0.87 ± 0.05	0.08 ± 0.01

Result of OSL dating

						Feldspar

LumNo.	Depth (cm)	Quartz				pIRIR₁₅₀					IR₅₀

		(cm) Dose rate (Gy/ka)	D_e (Gy)	Age (a)	σOD (%) σOD values were calculated according to Galbraith et al. (1999).	Dose rate (Gy/ka)	D_e (Gy)	g_2days (%/decade)	Age (a)	Corrected age (a)	D_e (Gy)	g_2days (%/decade)	Age (a)	Corrected age (a)
3197	80	3.24±0.23	0.28±0.01	87±7	6.3	4.02±0.17	0.81±0.05	0.99±0.38	202±15	214±21	0.34±0.01	8.38±0.59	85±4	145±13
3198	149	3.31±0.24	0.28±0.01	85±7	4.4	4.10±0.17	0.88±0.06	1.96±0.41	215±18	243±26	0.35±0.01	9.23±0.64	86±5	159±18
3191	380	3.13±0.23	0.34±0.01	110±9	6.6	3.96±0.17	0.68±0.03	0.38±0.28	173±10	177±14	0.38±0.01	9.18±0.52	96±5	178±17
3192	434	3.15±0.23	0.36±0.01	115±9	5.9	3.92±0.16	0.74±0.03	1.11±0.39	189±12	203±17	0.39±0.01	9.30±0.54	100±4	187±17
3193	462	3.26±0.24	0.37±0.01	114±9	12.5	4.05±0.17	0.66±0.03	0.44±0.31	164±9	168±13	0.39±0.01	9.36±0.74	96±5	181±21
3194	480	3.31±0.24	0.42±0.01	128±10	6.7	4.12±0.17	0.60±0.05	0.62±0.42	145±13	151±17	0.46±0.03	7.80±0.74	111±8	186±25
3195	511	3.19±0.22	4.69±0.14	1470±110	12.3	4.14±0.17	5.77±0.24	0.25±0.41	1390±80	1430±120	4.28±0.18	4.99±0.26	1040±60	1500±120
3196	532	3.08±0.21	15.3±0.3	4970±350	10.1	4.07±0.17	22.1±1.7	0.80±0.28	5420±470	5760±620	14.1±0.4	4.45±0.19	3480±180	4950±350

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Quartz OSL and K-feldspar post-IR IRSL dating of sand accumulation in the Lower Liao Plain (Liaoning, NE China)

Published Online: Mar 26, 2017

Page range: 1 - 15

Received: Sep 30, 2016

Accepted: Jan 23, 2017

DOI: https://doi.org/10.1515/geochr-2015-0051

Keywords
optically stimulated luminescence (OSL) dating, sand accumulation, the Lower Liao Plain, K-feldspar post-IR IRSL, Holocene

© 2016 Y. Li.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1