Chinese Science Bulletin

, Volume 46, Issue 9, pp 770–773

Magnetostratigraphy and pavleo-environmental record of Tertiary deposits of Lanzhou Basin

Authors

  • Leping Yue
    • Department of GeologyNorthwest University
  • F. Heller
    • Institute of GeophysicsETH-Honggerberg
  • Zhanxiang Qiu
    • Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of Sciences
  • Li Zhang
    • Department of GeologyNorthwest University
  • Guangpu Xie
    • Provincial Museum of Gansu
  • Zhuding Qiu
    • Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of Sciences
  • Yunxiang Zhang
    • Department of GeologyNorthwest University
Notes

DOI: 10.1007/BF03187220

Cite this article as:
Yue, L., Heller, F., Qiu, Z. et al. Chin.Sci.Bull. (2001) 46: 770. doi:10.1007/BF03187220

Abstract

The Tertiary deposits of the Yongdeng section, the Lanzhou Basin were studied by means of magnetostratigraphy. The magnetostratigraphic sequences from Paleocene to Miocene were established, and the time scale for the corresponding stratigraphy and mammalian faunas was also established by referring to their correlation to the GPTS of BKSA95 (The geomagnetic polarity time scale which was thoroughly revised and updated by Berggreen et al. in 1995). In the end the paleo-environmental records and their relationship with the uplifting of the Tibetan Plateau were discussed. The results are as follows. The top boundary of the Xiliugou Formation is dated to be 51 Ma, i.e. Eocene. The Yehucheng Formation covers the time span of 51—31.5 Ma, i.e. from late Early Eocene to early Early Oligocene. The Xianshuihe Formation covers the time span of 31.5—15 Ma, i.e. from Early Oligocene to Middle Miocene. The lower member of the Xianshuihe Formation spans from 31.5 to 20.0 Ma, i.e. from Early Oligocene to early Early Miocene. The middle member is from 20.0 to 16.5 Ma, i.e. in the middle Early Miocene.

Keywords

paleomagnetic stratigraphyLanzhou BasinTertiarythe Tibetan Plateaupaleo-environment

Copyright information

© Science in China Press 2001