Late Pleistocene to Holocene Palynofloras and Paleoclimate of Qagan Salt Lake, Inner Mongolia

Jiang Dexin; Wei Junchao

Based on the sporo-pollen analyses of the core samples of Corehole 83-CK1 from the Qagan Salt Lake in the Eren Basin ofthe Inner Mongolia, the sporo-pollen diagram were divided into four palynofloral zones, i. e. Zone I，Zone II，Zone lII，andZone Ⅳ in this paper. In accordance with the characteristics of the sporo-pollen assemblages, the problems on the vegetational evo-lution and the paleoclimatic changes in the past 18 ka as well as the sedimentary environment of salt lake were discussed. Ages ofthe sedimentary section of Corehole 83-CKl are based on¹⁴C dating. The results of this study indicate that the late stage of LatePleistocene Epoch (18-15 ka BP) and the early stage of Holocene Epoch (10-5 ka BP) with relatively wet and warm climaticconditions should be the preparatory stages for the formation of saline deposits; the last stage of Late Pleistocene Epoch (15-10 kaBP) and the late stage of Holocene Epoch (S ka BP to the present) with dry and cold climatic conditions should be the main stagesfor the formation and evolution of saline deposits in the Inner Mongolia

Lanzhou Institute of Geology,Chinese Academy of Sciences,Lanzhou 730000

Received Date: 1997-10-28

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Abstract: Based on the sporo-pollen analyses of the core samples of Corehole 83-CK1 from the Qagan Salt Lake in the Eren Basin ofthe Inner Mongolia, the sporo-pollen diagram were divided into four palynofloral zones, i. e. Zone I，Zone II，Zone lII，andZone Ⅳ in this paper. In accordance with the characteristics of the sporo-pollen assemblages, the problems on the vegetational evo-lution and the paleoclimatic changes in the past 18 ka as well as the sedimentary environment of salt lake were discussed. Ages ofthe sedimentary section of Corehole 83-CKl are based on¹⁴C dating. The results of this study indicate that the late stage of LatePleistocene Epoch (18-15 ka BP) and the early stage of Holocene Epoch (10-5 ka BP) with relatively wet and warm climaticconditions should be the preparatory stages for the formation of saline deposits; the last stage of Late Pleistocene Epoch (15-10 kaBP) and the late stage of Holocene Epoch (S ka BP to the present) with dry and cold climatic conditions should be the main stagesfor the formation and evolution of saline deposits in the Inner Mongolia

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Reference (7)

[1]	郑喜玉.张明刚.韩智明，董继和，张保珍，高章洪，孙大肠，徐捉. 王克俊.内蒙古盐湖.北京:科学出版社.1992,1-297.
[2]	耿伯介中国植物地理区域.上海:新知识出版社.1958. 1 - 128.
[3]	王伏雄，钱南芬，张玉龙，杨惠秋.中国植物花粉形态北京:科学出版社，1995,1-446.
[4]	中国科学院北京植物研究所中国玻类植物抱子形态.北京:科学出版社，1976,1-449.
[5]	姚植栋.Thompson L G,施雅风，秦大河.焦克勤，杨志红.田立德. Mosley-Thompson E古里雅309m深孔冰芯中末次间冰期以来气候变化研究.冰芯与寒区环境实验室年报，1996,2:47- 59.
[6]	姚植栋，Thompson L G，施雅风，秦大河，焦克勤，杨志红，田立德，Mosley-Thompson E.古里雅冰芯中末次间冰期以来气候变化记录研究.中国科学(D辑)，1997,27(5):
[7]	Sun Dapeng. Soda lakes and origin of their trona deposiu on the Nei Mongol plateau of China. Chinex Journal of Ocaanology and Limnology, 1987, 5:351-362.

[1]	郑喜玉.张明刚.韩智明，董继和，张保珍，高章洪，孙大肠，徐捉. 王克俊.内蒙古盐湖.北京:科学出版社.1992,1-297.
[2]	耿伯介中国植物地理区域.上海:新知识出版社.1958. 1 - 128.
[3]	王伏雄，钱南芬，张玉龙，杨惠秋.中国植物花粉形态北京:科学出版社，1995,1-446.
[4]	中国科学院北京植物研究所中国玻类植物抱子形态.北京:科学出版社，1976,1-449.
[5]	姚植栋.Thompson L G,施雅风，秦大河.焦克勤，杨志红.田立德. Mosley-Thompson E古里雅309m深孔冰芯中末次间冰期以来气候变化研究.冰芯与寒区环境实验室年报，1996,2:47- 59.
[6]	姚植栋，Thompson L G，施雅风，秦大河，焦克勤，杨志红，田立德，Mosley-Thompson E.古里雅冰芯中末次间冰期以来气候变化记录研究.中国科学(D辑)，1997,27(5):
[7]	Sun Dapeng. Soda lakes and origin of their trona deposiu on the Nei Mongol plateau of China. Chinex Journal of Ocaanology and Limnology, 1987, 5:351-362.

Late Pleistocene to Holocene Palynofloras and Paleoclimate of Qagan Salt Lake, Inner Mongolia

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