Comparison of Equivalent Doses Obtained with Various post-IR IRSL Dating Protocols of K-Feldspar

doi:10.2478/geochr-2020-0010

IEECAS OpenIR

	Comparison of Equivalent Doses Obtained with Various post-IR IRSL Dating Protocols of K-Feldspar
	Zhang, Junjie 1; Li, Sheng-Hua 1; Wang, Xulong 2; Hao, Qingzhen 3,4,5; Hu, Guiming 1; Chen, Yiwei 6
通讯作者	Li, Sheng-Hua(shli@hku.hk)
	2021
发表期刊	GEOCHRONOMETRIA
ISSN	1897-1695
卷号	48 期号:1 页码:129-137
摘要	Five dating protocols with post-infrared infrared (IR) stimulated luminescence signals (i.e. pIRIR) were performed on the K-feldspar of loess samples. Two of them were the single-aliquot regenerative-dose protocol (SAR) with two-step pIRIR stimulation, with the first IR stimulation at 50 degrees C or 200 degrees C and the second at 290 degrees C (pIR(50)IR(290), pIR(200)IR(290)). Two of them were the SAR protocols with five-step or six-step IR stimulation at multiple elevated temperatures to 250 degrees C or 300 degrees C (MET-pIRIR(250), MET-pIRIR(300)). The final one was the multiple-aliquot regenerative-dose (MAR) protocol with the MET-pIRIR(300) signal, together with a 500 degrees C heat treatment administered before the test dose ('MAR with heat'). The results show that when the equivalent dose (D-e) of the sample was less than 500 Gy, all of the protocols gave consistent results; however, when D-e exceeded 750 Gy, all of the SAR protocols underestimated D-e. The pIR(50)IR(290) signal had the highest degree of underestimation, while the pIR(200)IR(290), MET-pIRIR(250) and MET-pIRIR(300) signals had similar D-e values and similar degrees of underestimation. Possible reasons for the SAR D-e underestimation are discussed. We suggest that only the 'MAR with heat' protocol is suitable for samples with D-e exceeding 750 Gy.
关键词	Chinese loess Potassium feldspar pIRIR protocols age underestimations
DOI	10.2478/geochr-2020-0010
关键词[WOS]	INFRARED-STIMULATED LUMINESCENCE ; GROWTH CURVE GSGC ; MET-PIRIR SIGNALS ; SENSITIVITY CHANGE ; CHINESE LOESS ; QUARTZ ; SEDIMENTS ; RATES
收录类别	SCI ; SCI
语种	英语
资助项目	Research Grant Council of the Hong Kong SAR, China[17303014] ; Research Grant Council of the Hong Kong SAR, China[17307117]
WOS研究方向	Geology
项目资助者	Research Grant Council of the Hong Kong SAR, China
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000741324800002
出版者	SCIENDO
引用统计
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/17380
专题	中国科学院地球环境研究所
通讯作者	Li, Sheng-Hua
作者单位	1.Univ Hong Kong, Dept Earth Sci, Hong Kong, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China 6.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Junjie,Li, Sheng-Hua,Wang, Xulong,et al. Comparison of Equivalent Doses Obtained with Various post-IR IRSL Dating Protocols of K-Feldspar[J]. GEOCHRONOMETRIA,2021,48(1):129-137.
APA	Zhang, Junjie,Li, Sheng-Hua,Wang, Xulong,Hao, Qingzhen,Hu, Guiming,&Chen, Yiwei.(2021).Comparison of Equivalent Doses Obtained with Various post-IR IRSL Dating Protocols of K-Feldspar.GEOCHRONOMETRIA,48(1),129-137.
MLA	Zhang, Junjie,et al."Comparison of Equivalent Doses Obtained with Various post-IR IRSL Dating Protocols of K-Feldspar".GEOCHRONOMETRIA 48.1(2021):129-137.