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《Geochimica》 2016-02
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Holocene millennium-scale climatic variations as recorded by Rb and Sr concentrations for the MGS1 stratigraphical segment of Milanggouwan section in the Salawusu River Valley of Southeast Mu Us Desert

NIU Dong-feng;LI Bao-sheng;WEI Jian-guo;WEN Xiao-hao;SHU Pei-xian;SI Yue-jun;School of Geography, South China Normal University;State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment,Chinese Acdemy of Sciences;Land Supervision Center,Heze Bureau of Land Resources;  
The MGS1 stratigraphical segment of Milanggouwan section is located in the Salawusu River Valley of southeast Mu Us Desert. The segment documents 11 sedimentary cycles consisting of aeolian facies and fluvial facies or lacustrine-swamp facies. Totally 63 samples were analyzed for rubidium(Rb) and strontium(Sr) concentrations. The results show that Rb and Sr concentrations increase as the sediments vary from aeolian facies to lacustrine-swamp facies, however, variation of the Rb/Sr ratios shows reversed trends in contrast to that of Rb and Sr concentrations. The line correlation coefficients of Rb and Sr concentrations and Rb/Sr ratios with mean grain size are all above 0.43. All these indicate that the MGS1 stratigraphic segment at least records 11 cold-dry and 11 warm-humid millennium-scale climatic oscillations, which represent the evolution history of East Asian monsoon circulation and show good correspondence to global climatic and environment variations.
【Fund】: 国家重点基础研究发展计划(2013CB955903);; 国家自然科学基金(41471159)
【CateGory Index】: P532
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