Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.quageo.2018.02.001 |
Single-grain dating of potassium-rich feldspar grains: Towards a global standardised growth curve for the post-IR IRSL signal | |
Li, Bo1,2; Jacobs, Zenobia1,2; Roberts, Richard G.1,2; Li, Sheng-Hua3 | |
通讯作者 | Li, Bo |
来源期刊 | QUATERNARY GEOCHRONOLOGY
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ISSN | 1871-1014 |
EISSN | 1878-0350 |
出版年 | 2018 |
卷号 | 45页码:23-36 |
英文摘要 | Potassium-rich feldspar (K-feldspar) grains were extracted from 28 sediment samples from sites in Asia, Europe and Africa and the dose response curves - or growth curves - were constructed from the post-infrared infrared stimulated luminescence (pIRIR) signals emitted by individual grains. The samples exhibit large between-grain variation in both pIRIR signal intensity and the shape of the corresponding growth curves; the latter can be largely explained as a result of measurement uncertainties, including counting statistics and instrumental irreproducibility. This between-grain variation can be reduced by applying a least-squares normalisation (LS-normalisation) procedure, which allows a common growth curve - or global standardised growth curve (gSGC) - to be established for individual K-feldspar grains from the range of samples investigated. Equivalent dose (D-e) values for single grains can be estimated using the fitting parameters of the gSGC, together with measurements of the natural signal (L-n), one regenerative-dose signal (L-x) and their corresponding test-dose signals (T-n, T-x). The D-e values obtained using the gSGC approach are consistent at 2 sigma with those obtained from the individual growth curves constructed for each of the grains. The establishment of a gSGC greatly reduces the time required to measure a large number of grains for old samples, and it also overcomes the problem of D-e underestimation that can occur using a full single-aliquot (or single-grain) regenerative-dose (SAR) procedure when a large number of grains are rejected due to issues of ’saturation’. The construction of a gSGC may, therefore, potentially extend the dating range of pIRIR signals beyond the reliable limit of D-e estimation using the standard SAR method. |
英文关键词 | K-feldspar Infrared stimulated luminescence pIRIR gSGC D-e underestimation |
类型 | Article |
语种 | 英语 |
国家 | Australia ; Peoples R China |
收录类别 | SCI-E ; SSCI |
WOS记录号 | WOS:000439534200003 |
WOS关键词 | INFRARED-STIMULATED LUMINESCENCE ; FTEAH CAVE CYRENAICA ; JINMIUM ROCK SHELTER ; US DESERT MARGIN ; NORTHERN AUSTRALIA ; MULTIPLE GRAINS ; OSL CHRONOLOGY ; BLOMBOS CAVE ; SOUTH-AFRICA ; K-FELDSPAR |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Physical Geography ; Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/212420 |
作者单位 | 1.Univ Wollongong, Ctr Archaeol Sci, Sch Earth & Environm Sci, Wollongong, NSW 2522, Australia; 2.Univ Wollongong, ARC, Ctr Excellence Australian Biodivers & Heritage, Wollongong, NSW 2522, Australia; 3.Univ Hong Kong, Dept Earth Sci, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Bo,Jacobs, Zenobia,Roberts, Richard G.,et al. Single-grain dating of potassium-rich feldspar grains: Towards a global standardised growth curve for the post-IR IRSL signal[J],2018,45:23-36. |
APA | Li, Bo,Jacobs, Zenobia,Roberts, Richard G.,&Li, Sheng-Hua.(2018).Single-grain dating of potassium-rich feldspar grains: Towards a global standardised growth curve for the post-IR IRSL signal.QUATERNARY GEOCHRONOLOGY,45,23-36. |
MLA | Li, Bo,et al."Single-grain dating of potassium-rich feldspar grains: Towards a global standardised growth curve for the post-IR IRSL signal".QUATERNARY GEOCHRONOLOGY 45(2018):23-36. |
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