SCIENTIA GEOGRAPHICA SINICA ›› 2006, Vol. 26 ›› Issue (2): 192-198.doi: 10.13249/j.cnki.sgs.2006.02.192

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Liupanshan Loess Since Last 1.8 Ma B.P. on Longxi Basin of Western China and Its Response to Tectonic Movement and Climate

YANG Dong1,3, FANG Xiao-Min2,3, PENG Zi-Cheng1, LI Ji-Jun3   

  1. 1. Department of Earth and Space Science, University of Science and Technology of China, Hefei, Anhui 230026;
    2. Institute of Tibet Plateau, Chinese Academy of Sciences, Beijing 100085;
    3. National Laboratory of Western China's Environmental Systems, College of Resource and Environment, Lanzhou University, Lanzhou, Gansu 730000
  • Received:2004-12-22 Revised:2005-04-23 Online:2006-03-20 Published:2006-03-20

Abstract: Analyses of paleomagnetic polarity reversals, magnetic susceptibility and grain size on the loess-paleosol sequence of Duanxian section, at a pediment of Longxi Basin lying to the west of Liupan Mountain show that this sequence contains most of the stratigraphic units recorded in the standard loess-paleosol of section on the China Loess Plateau over the past 1.8Ma. Research suggests that the loess-paleosol sequence of Duanxian section has seven terraces and a preliminary study on it finds that during the past 1.8Ma, there were two important climatic events indicating the advance of Tengger Desert. The events occurred at about 1.1and 0.8 Ma B.P., respectively. These not only reflect effect of uplift of the Tibetan Plateau in the late Cenozoic on the environment of the western Loess Plateau, but also record details of the coupling effect between tectonics and climate responses of this area to the East Asian monsoon.

CLC Number: 

  • X141