Acta Geographica Sinica ›› 1994, Vol. 49 ›› Issue (6): 500-508.doi: 10.11821/xb199406003

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THE GLACIER VARIATION,CLIMATIC CHANGE AND THE RIVER VALLEY DEVELOPMENT IN THE HOLOCENE ON THE GONGGA MOUNTAINS

Zheng Brnxing, Ma Qiuhua   

  1. Lanzhou institute of Glaciotogy and Geocryology, Academia Sinica, Lanzhou 730000
  • Online:1994-11-15 Published:1994-11-15

Abstract: On the Gongga Mountains, the relationship between the glacier variation and the development of the river terrace is very close.In the early Holocene, the climate became warm, and the glaciers gradually retreated. The fourth fluvial terrace was formed(T4) (the lower section) .In the Hypasithermal period of the middle Holocene(7 500-4 000aBP),the glaciers retreated strongly. The middle and upper sections of the fourth terrace were formed (T4)(<7 420 ± 90aBP).In the late Holocene,the climate turned to be cold and the Neoglaciation can be divided into three stages:the pre-Guanjingtai glacier(<3 080± 80aBP) , the Guanjingtai glacier(1 530± 80-2 350 ± 65aBP), and the Hailuogou glacier(840 ± 85-780 ± 90aBP). The three terraces were respectively : T3 : >3 000aBP, T2 : 1 200±70-2 170± 60aBP and T1: 930 ± 70aBP. The earliest Modern Little Ice Age appeared in 400aBP ,and there were three time of climate waving. They occurred in the periods of 1603-1650AD, 1751- 1800AD, 1851-1900AD──the three cold climate periods.

Key words: Glacial variation, Terrace Holocene