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DOI	10.1016/j.quageo.2018.05.006
	Testing post-IR IRSL luminescence dating methods in the southwest Mojave Desert, California, USA
	Carr, Andrew S.1; Hay, Alex S.1; Powell, D. Mark 1; Livingstone, Ian 2
通讯作者	Carr, Andrew S. ; Hay, Alex S.
来源期刊	QUATERNARY GEOCHRONOLOGY
ISSN	1871-1014
EISSN	1878-0350
出版年	2019
卷号	49 页码:85-91
英文摘要	The Mojave Desert presents an array of Pleistocene lacustrine deposits and aeolian landforms to which, at times, it has proved challenging to apply luminescence methods. We tested the suitability of K-feldspar post-IR IRSL methods using two sites with independent radiocarbon dating shorelines at Harper Lake and Silver Lake - considering: 1) overall performance of the post-IR IRSL 225 degrees C (PIRIR225) protocol; 2) effect of test dose size on pIRIR(225) D-e; 3) anomalous fading correction of pIRIR(225) ages; 4) preliminary single grain pIRIR(225) results. We observe consistently good performance of the single aliquot pIRIR(225) protocol, with good dose recovery, acceptable recycling ratios, low recuperation and low inter-aliquot scatter. The pIRIR(225) ages for Silver Lake (8.8 +/- 0.4 and 11.3 +/- 0.5 ka) and Harper Lake (both 25.4 +/- 1.4 ka) are in substantially better agreement with the independent dating than low temperature (50 degrees C) IRSL and quartz OSL ages. pIRIR(225) fading rates are reduced to similar to 2.0-2.5% per decade, but there remains a tendency for under-estimation when using uncorrected ages. A need for fading correction is further implied at Harper Lake via comparison with multi-elevated temperature (MET)-PIR age plateaus and pIRIR(290) measurements, although at the younger Silver lake site these methods produce ages nearly identical to the uncorrected pIRIR(225) ages. Preliminary single grain pIRIR(225) measurements suggest a similar to 25-30% usable grain yield. At Silver Lake the single grain and single aliquot ages agree well despite over-dispersion of the single grain equivalent dose distribution. At Harper Lake the single grain and single aliquot pIRIR(225) ages also agree well, although a population of insensitive, lower D-e grains is observed. These grains are not associated with significantly higher fading rates.
类型	Article
语种	英语
国家	England
开放获取类型	Green Published, Green Accepted, hybrid
收录类别	SCI-E
WOS记录号	WOS:000454376300015
WOS关键词	SAND RAMPS ; K-FELDSPARS ; LAKE MANIX ; SEDIMENTS ; RADIOCARBON ; ALIQUOT ; SIGNALS ; RECORD ; QUARTZ ; OSL
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/2XILL650/218207
作者单位	1.Univ Leicester, Sch Geog Geol & Environm, Univ Rd, Leicester LE1 7RH, Leics, England; 2.Univ Northampton, Grad Sch, Northampton NN2 7AL, England
推荐引用方式 GB/T 7714	Carr, Andrew S.,Hay, Alex S.,Powell, D. Mark,et al. Testing post-IR IRSL luminescence dating methods in the southwest Mojave Desert, California, USA[J],2019,49:85-91.
APA	Carr, Andrew S.,Hay, Alex S.,Powell, D. Mark,&Livingstone, Ian.(2019).Testing post-IR IRSL luminescence dating methods in the southwest Mojave Desert, California, USA.QUATERNARY GEOCHRONOLOGY,49,85-91.
MLA	Carr, Andrew S.,et al."Testing post-IR IRSL luminescence dating methods in the southwest Mojave Desert, California, USA".QUATERNARY GEOCHRONOLOGY 49(2019):85-91.