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Quartz OSL chronology and dust accumulation rate changes since the Last Glacial at Weinan on the southeastern Chinese Loess Plateau
Kang, SG (Kang, Shugang)[ 1 ]; Wang, XL (Wang, Xulong)[ 1 ]; Lu, YC (Lu, Yanchou)[ 1 ]
2013-10-30
发表期刊BOREAS
卷号42期号:4页码:815-829
文章类型期刊论文
摘要

The fine-grained (4-11m) quartz Optically Stimulated Luminescence (OSL) dating technique was applied to the Weinan section on the southeastern Chinese Loess Plateau (CLP) with a high luminescence sampling resolution (10- and 20-cm intervals). Fifty-eight OSL ages, spanning c. 1-74ka, were obtained for the 10-m loess-palaeosol sequences. The reliability of the OSL dating and the constructed chronology was confirmed by comparing the OSL ages with independent dates from other studies and by correlation with palaeoclimatic time series. The closely spaced OSL ages at Weinan indicate that the mean dust accumulation rate (DAR) of L1-1 (MIS 2, 7.0 +/- 0.9cmka(-1)) is lower than those of L1-3 (MIS 4, 19.1 +/- 6.1cmka(-1)) and L1-2 (MIS 3, 16.0 +/- 0.7cmka(-1)) and that the mean DARc. 30-20ka ago (11.4 +/- 2.4cmka(-1)) is higher than that c. 20-10ka ago (3.0 +/- 0.1cmka(-1)) in L1-1. The subsequent calculation of the mass accumulation rate (MAR) indicates that the MAR of L1-1 (107gm(-2)a(-1)) is much lower than those of L1-2 (247gm(-2)a(-1)) and L1-3 (307gm(-2)a(-1)). By comparing the mean DAR results during the Last Glacial at Weinan with those at a further six sites from other studies, we observed that the mean DAR of L1-2 is higher (lower) than that of L1-1 on the eastern (western) CLP, and that the mean DAR during MIS 2 has an evident transition from high to low at c. 20ka on the entire CLP. Possible mechanisms for the above mean DAR changes at orbital and sub-orbital time scales are presented.

DOI10.1111/bor.12005
收录类别SCI
语种英语
引用统计
被引频次:67[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/9931
专题现代环境研究室
通讯作者Kang, SG (Kang, Shugang)[ 1 ]
作者单位Xulong Wang and Yanchou Lu, State Key Laboratory of Loess and QuaternaryGeology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China
推荐引用方式
GB/T 7714
Kang, SG ,Wang, XL ,Lu, YC . Quartz OSL chronology and dust accumulation rate changes since the Last Glacial at Weinan on the southeastern Chinese Loess Plateau[J]. BOREAS,2013,42(4):815-829.
APA Kang, SG ,Wang, XL ,&Lu, YC .(2013).Quartz OSL chronology and dust accumulation rate changes since the Last Glacial at Weinan on the southeastern Chinese Loess Plateau.BOREAS,42(4),815-829.
MLA Kang, SG ,et al."Quartz OSL chronology and dust accumulation rate changes since the Last Glacial at Weinan on the southeastern Chinese Loess Plateau".BOREAS 42.4(2013):815-829.
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