Arid
DOI10.1016/j.quageo.2013.02.004
A modified multi-elevated-temperature post-IR IRSL protocol for dating Holocene sediments using K-feldspar
Fu, Xiao; Li, Sheng-Hua
通讯作者Li, Sheng-Hua
来源期刊QUATERNARY GEOCHRONOLOGY
ISSN1871-1014
EISSN1878-0350
出版年2013
卷号17页码:44-54
英文摘要

A modified multi-elevated-temperature post-IR infra-red stimulated luminescence (MET-pIRIR) protocol is proposed for dating young samples of Holocene age using K-feldspar. The protocol utilizes a five-step MET-pIRIR measurement with a moderate preheating of 200 degrees C for 60 s, and a narrow IR stimulation temperature increment of 30 degrees C (i.e., the five measurement temperatures are 50, 80, 110, 140 and 170 degrees C). Using this method, the residual doses of the MET-pIRIR signals are generally less than 1 Gy. Holocene aeolian samples from Northern China were tested using the 30 degrees C-increment modified MET-pIRIR method. The results demonstrate that similar ages from 140 degrees C to 170 degrees C were obtained for our samples, which were consistent with the quartz optically stimulated luminescence (OSL) ages. Based on this observation, the measurement procedures are further simplified to a three-step pIRIR protocol. The first IR stimulation at elevated temperature (110 degrees C) is used to remove the fading affected signals. This is followed by two steps of IR stimulation at high temperatures (140 and 170 degrees C) for equivalent dose (De) measurement. Dating results consistent with the expected ages have been obtained at stimulation temperatures of 140 and 170 degrees C. It is suggested that the first IR stimulation can effectively remove the fading component. The three-step pIRIR method has minimized the experimental procedures, while keeping the age plateau test. (C) 2013 Elsevier B.V. All rights reserved.


英文关键词K-feldspar Holocene Aeolian sediments Post-IR IRSL Residual dose Anomalous fading
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000320826400004
WOS关键词INFRARED-STIMULATED LUMINESCENCE ; ANOMALOUS FADING CORRECTION ; CHINESE LOESS ; DOSE-RATE ; GRAINS ; DESERTS ; QUARTZ ; RATES
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/2XILL650/179529
作者单位Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China
推荐引用方式
GB/T 7714
Fu, Xiao,Li, Sheng-Hua. A modified multi-elevated-temperature post-IR IRSL protocol for dating Holocene sediments using K-feldspar[J],2013,17:44-54.
APA Fu, Xiao,&Li, Sheng-Hua.(2013).A modified multi-elevated-temperature post-IR IRSL protocol for dating Holocene sediments using K-feldspar.QUATERNARY GEOCHRONOLOGY,17,44-54.
MLA Fu, Xiao,et al."A modified multi-elevated-temperature post-IR IRSL protocol for dating Holocene sediments using K-feldspar".QUATERNARY GEOCHRONOLOGY 17(2013):44-54.
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