1.School of Geography, South China Normal University, Guangzhou,Guangdong 510631, China 2. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an,Shaanxi 710061, China 3.Chenghai Middle-school, Shantou, Guangdong 515800, China 4.College of Earth Science, East China Institute of Technology, Nanchang, Jiangxi 330013, China 5.Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences,Guangzhou, Guangdong 510301, China
The MGS2 segment of the Milangguowan stratigraphical section in the Salawusu River Valley, southeast of China’s Mu Us Desert, records 5.5 sedimentary cycles consisting of dune sands alternating with fluvial or lacustrine facieses. Based on the grain-size and CaCO3 analysis, it was found that Mz and σ appear peaks and valleys in different sedimentary facieses. CaCO3 contents range from 0 to 2.94% (average 0.39%) in the dune sands, 0.14% to 2.68% (average 1.43%) in the fluvial facieses and 0.39% to 15.57% (average 8.82%) in the lacustrine, and appear 5.5 grain-size and CaCO3 cycles similar to the sedimentary facieses changes. And the CaCO3 contents have a significant correlation with Mz. The result show that the dune sands accumulate and CaCO3 moved greatly during the periods with a strong cold-dry winter monsoon. Whereas, the fluvial or lacustrine facieses developed, silt and clay increased and CaCO3 gathered largely when the warm-humid summer monsoon strengthened. The observed climate fluctuations on millennium-scale during the Pleniglacial to the alternations attributed the strength of the East Asian winter and summer monsoons.
. 萨拉乌苏河流域MGS2层段粒度与CaCO3记录的千年尺度气候变化[J]. 地理科学,
2012, 32(5): 596-602.
Jiang-long WANG et al
. Millennium-scale Climate Variations from the Record of Grain-size and CaCO3 During the Pleniglacial in the Salawusu River Valley, China[J]. SCIENTIA GEOGRAPHICA SINICA,
2012, 32(5): 596-602.
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