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题名: The equivalent dose of different grain size quartz fractions from lakeshore sediments in the arid region of north China
作者: Fan, YX; Zhao, H; Chen, FH(陈发虎)
收录类别: SCIE ; CPCI-S
出版日期: 2010-04-06
会议名称: 12th International Conference on Luminescence and Electron Spin Resonance
会议日期: SEP 18-22, 2008
会议地点: Beijing, PEOPLES R CHINA
英文摘要: Equivalent dose (D(e)) values were measured by using medium aliquots of different grain size quartz fractions of five lakeshore sediments from the arid region of north China. There are two different relationships between De values and grain sizes of these five samples. The first relationship is that the D(e) values obtained from various grain sizes are in agreement within 1 delta errors. The second relationship is that D(e) values are similar to each other for fractions between 125 and 300 pm, while the D(e) value of the 63-90 mu m fraction is 40 similar to 55% smaller than others. For example, the D(e) values obtained for sample #3 are 20.15 +/- 1.19 Gy, 19.80 +/- 0.83 Gy and 20.93 +/- 1.06 Gy for fractions of 90-125, 125-150 and 250-300 mu m respectively, but are 10.79 +/- 0.84 Gy for the 63-90 mu m fraction. The second relationship can't be interpreted by previous studies of both dosimetry and heterogeneous bleaching. It is deduced for sample #2, #3 and #6 that fine particles (<90 mu m) intruded after the dominant sedimentation. Comparison of OSL ages from different grain size fractions of sample #2 with a radiocarbon age from the same lithologic layer supports that fractions coarser than 125 pm yield more reliable burial ages, while the fraction finer than 90 pm yields underestimated ages for some lakeshore sediments from this arid region. (C) 2009 Elsevier B.V. All rights reserved.
关键词: Equivalent dose ; OSL ; SAR ; Grain size ; Quartz ; Lakeshore sediments ; Arid region
作者部门: [Zhao, Hui] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China ; [Fan, Yu-Xin ; Zhao, Hui ; Chen, Fa-Hu] Lanzhou Univ, Key Lab Western Chinas Environm Syst, Minist Educ, CAEP, Lanzhou 730000, Peoples R China
通讯作者: Zhao, H (reprint author), Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China.
学科分类: Physical Geography; Geology
会议主办者: Peking Univ
会议录: QUATERNARY GEOCHRONOLOGY
卷号: 5
期号: 2-3
页码: 205-211
出版者: Elsevier
出版地: OXFORD
语种: 英语
DOI: 10.1016/j.quageo.2009.05.012
ISSN号: 1871-1014
WOS记录号: WOS:000276666900024
IR记录号: WOS:000276666900024
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内容类型: 会议论文
URI标识: http://ir.lzu.edu.cn/handle/262010/184671
Appears in Collections:资源环境学院_会议论文

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Recommended Citation:
Fan, YX,Zhao, H,Chen, FH. The equivalent dose of different grain size quartz fractions from lakeshore sediments in the arid region of north China[C]. 见:12th International Conference on Luminescence and Electron Spin Resonance. Beijing, PEOPLES R CHINA. SEP 18-22, 2008.
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