SCIENTIA GEOGRAPHICA SINICA ›› 1998, Vol. 18 ›› Issue (4): 349-354.doi: 10.13249/j.cnki.sgs.1998.04.349

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EARLY PLEISTOCENE OF LACUSTRINE HIGH RESOLUTION CLIMATE OF DONGSHAN LAKE IN LINXIA BASIN

Wang Jianli1, Li Jijun2, Fang Xiaomin2   

  1. 1. Geographical Department of Southwest Normal University, Chongqing 630715;
    2. Geography Department of Lanzhou University, Lanzhou 730000
  • Received:1996-12-10 Revised:1997-05-16 Online:1998-07-20 Published:1998-07-20

Abstract: A total of 3267 carbonate samples were taken with 2.5 cm interval from 84 m thick lacustrine deposits in Linxia Basin. The carbonate content is employed as a proxy of climate records. The spectrum analysis results show that in the period of 2.35-1.65 Ma B.P., the paleoclimate had a clear 41000 a dominant periodicity, suggesting that the earth’s obliquity change was the main cause of climate change over this period. The results also show there were two obvious humid periods happening at 2.28 Ma and 1.75-1.80 Ma B.P. respectively, suggesting that the monsoon climate was not stable in the Early Pleistocene.

CLC Number: 

  • P532.42