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| Trace Element Characteristics and Indicative Paleoclimate during Marine Isotope Stage 5e (MIS5e) in the Southern Tengger Desert, Northwestern China |
| Meng Jie1, Wen Xiaohao1, Li Baosheng1,2, Niu Dongfeng1, Zhao Zhanlun1, Sun Yefeng1, Yang Qinjiang1 |
1. School of Geographical Science, South China Normal University, Guangzhou 510631, China;
2. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China |
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Abstract The TMS5e sequence from the Tumen Section, at the southern edge of Tengger Desert in the northwestern China, is synchronous with Marine Isotope Stage 5e (MIS5e). It consists of 16 layers of aeolian dune sands, 11 layers of lacustrine loess-like facies, and 5 layers of lacustrine facies. The results of trace elements analysis shows that the concentrations of 10 trace elements in TMS5e varies as P > Mn > Sr > Rb > V > Cr > Zn > Ni > Cu > Nb. The palaeo-mobile dune sands and palaeo-fixed to semi-fixed dune sands have lower contents of trace elements than those of the whole TMS5e sequence. The loess-like sandy loams also have slightly lower contents of trace elements than those of the whole TMS5e sequence.The average contents of the lacustrine loess-like faciesare similar to those of lacustrine facies, both of which have higher contents than those of the three aeolian dune sands. The contents of trace elements in the TMS5e sequence indicate that the climate in southern Tengger Desert during MIS5e significantly varied within at least 14.5 warm-cold fluctuations.Such variations could be divided into five stages: TMS5e5 (139.0-129.3 ka BP), TMS5e4 (129.3-124 ka BP), TMS5e3 (124.0-119.5 ka BP), TMS5e2 (119.5-116.5 ka BP), and TMS5e1 (116.5-113.7 ka BP), roughly consistent with MIS5e5, MIS5e4, MIS5e3, MIS5e2 and MIS5e1 in the GRIP ice core record, respectively.
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Received: 30 October 2014
Published: 20 May 2015
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2015, Vol. 35 
