| Paleoclimate and Environment Evolution |
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| Climate Fluctuations during the Earlier Last Glacial Reflected by the MGS4 Segment in the Salawusu River Valley, China |
| SI Yue-jun1, LI Bao-sheng1,2, WEN Xiao-hao1, YANG Yi1, DU Shu-huan1, NIU Dong-feng1, WANG Feng-nian1, ZHAO Xin-nan1, WANG Jiang-long1 |
1.Department of Geography, South China Normal University, Guangzhou 510631, China;
2.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xian 710061, China |
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Abstract There are 5.5 sedimentary cycles made of aeolian facies, fluvial facie and lacustrine-swamp facies in the MGS4 segment in Salawusu River valley of China during the earlier Last Glacial. Analysis of grain size composition and trace elements contents in these sedimentary cycles shows that mean values (Mz) and standard deviation(σ) of particles size, and particle content ratio of silt+clay and sand (SC/D) in the fluvial facie and lacustrine-swamp facies are higher than those in the aeolian facies, and the contents of Mn, P, Rb, Zr, V, and Ni in the fluvial facie and lacustrine-swamp facies are higher than those in the aeolian facies, while the contents of Ba and Co show the opposite results. The fluctuation of these proxies constitutes the 5.5 change cycles of grain size and trace elements corresponding with the above-mentioned sedimentary cycles. It indicates that at least six cold-dry events and five wet-warm events happened during the earlier stage of the Last Glacial in this region. The records of millennial scale climate fluctuations in Milanggouwan section reflect not only the evolution of the East Asian monsoon circulation, but also the global climate changes.
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Received: 11 September 2011
Published: 21 November 2011
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Cite this article:
SI Yue-jun, LI Bao-sheng, WEN Xiao-hao, YANG Yi, DU Shu-huan, NIU Dong-feng, WANG Feng-nian, ZHAO Xin-nan, WANG Jiang-long. Climate Fluctuations during the Earlier Last Glacial Reflected by the MGS4 Segment in the Salawusu River Valley, China. JOURNAL OF DESERT RESEARCH, 2012, 32(4): 938-946.
URL:
http://www.desert.ac.cn/EN/ OR http://www.desert.ac.cn/EN/Y2012/V32/I4/938
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