Quartz OSL dating of sand dunes of Late Pleistocene in the Mu Us Desertin northern China

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	Quartz OSL dating of sand dunes of Late Pleistocene in the Mu Us Desertin northern China
	He, Zhong; Zhou, Jie; Lai, ZhongPing; Yang, LinHai; Liang, JianMin; Long, Hao; Ou, XianJiao
	2010
发表期刊	QUATERNARY GEOCHRONOLOGY
ISSN	1871-1014
卷号	5 期号:2-3 页码:102-106
摘要	The Mu Us Desert, located in the northwestern fringe of the East Asian monsoon region, is sensitive to climate variability. The desert is characterized by mobile, semi-fixed and fixed sand dunes. Alternating units of dune sands and sandy palaeosols in the Mu Us Desert imply multiple episodes of dune building and stabilization, in response to the ebb and flow of the East Asian monsoon. Desert evolution and climatic change of high-resolution in the Mu Us Desert are still poorly understood due to limited numerical dating results. In the present study, 19 samples collected from five sand dune sections along a northwest-southeast transect in the Mu Us Desert were dated using quartz optically stimulated luminescence (OSL) and single aliquot regenerative-dose (SAR) protocol. Internal checks of the OSL dating indicate that the SAR protocol is appropriate for equivalent dose (De) determination for the samples under study. Combined with the lithologic stratigraphy and the luminescence chronology, the sand dune development in the Mu Us Desert during the Late Pleistocene is discussed. Our results indicate that the sand was mobilized approximately at 91 ka, 71 ka, 48-22 ka, 5 ka, 1 ka, and 0.44 ka; the sand was fixed approximately at 65 ka and Holocene Optimum period in the interior Mu Us Desert. The Mu Us Desert formed at least before 144 ka, and has shown increasing aridity in the Late Pleistocene. (C) 2009 Elsevier B.V. All rights reserved. The Mu Us Desert, located in the northwestern fringe of the East Asian monsoon region, is sensitive to climate variability. The desert is characterized by mobile, semi-fixed and fixed sand dunes. Alternating units of dune sands and sandy palaeosols in the Mu Us Desert imply multiple episodes of dune building and stabilization, in response to the ebb and flow of the East Asian monsoon. Desert evolution and climatic change of high-resolution in the Mu Us Desert are still poorly understood due to limited numerical dating results. In the present study, 19 samples collected from five sand dune sections along a northwest-southeast transect in the Mu Us Desert were dated using quartz optically stimulated luminescence (OSL) and single aliquot regenerative-dose (SAR) protocol. Internal checks of the OSL dating indicate that the SAR protocol is appropriate for equivalent dose (De) determination for the samples under study. Combined with the lithologic stratigraphy and the luminescence chronology, the sand dune development in the Mu Us Desert during the Late Pleistocene is discussed. Our results indicate that the sand was mobilized approximately at 91 ka, 71 ka, 48-22 ka, 5 ka, 1 ka, and 0.44 ka; the sand was fixed approximately at 65 ka and Holocene Optimum period in the interior Mu Us Desert. The Mu Us Desert formed at least before 144 ka, and has shown increasing aridity in the Late Pleistocene. (C) 2009 Elsevier B.V. All rights reserved.
语种	英语
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/1921
专题	青海盐湖研究所知识仓储
推荐引用方式 GB/T 7714	He, Zhong,Zhou, Jie,Lai, ZhongPing,et al. Quartz OSL dating of sand dunes of Late Pleistocene in the Mu Us Desertin northern China[J]. QUATERNARY GEOCHRONOLOGY,2010,5(2-3):102-106.
APA	He, Zhong.,Zhou, Jie.,Lai, ZhongPing.,Yang, LinHai.,Liang, JianMin.,...&Ou, XianJiao.(2010).Quartz OSL dating of sand dunes of Late Pleistocene in the Mu Us Desertin northern China.QUATERNARY GEOCHRONOLOGY,5(2-3),102-106.
MLA	He, Zhong,et al."Quartz OSL dating of sand dunes of Late Pleistocene in the Mu Us Desertin northern China".QUATERNARY GEOCHRONOLOGY 5.2-3(2010):102-106.

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