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Journal of Geographical Sciences

, Volume 18, Issue 2, pp 211–224 | Cite as

Sedimentary characteristics of paleo-aeolian dune sands of Salawusu Formation in the Salawusu River Valley

  • Xianjiao Ou
  • Baosheng Li
  • Heling Jin
  • Guangrong Dong
  • David Dian Zhang
  • Zheng Wu
  • Xiaohao Wen
  • Lanhua Zeng
  • Chuntao Ouyang
  • Yi Yang
  • Yufei Liu
Article

Abstract

The Salawusu Formation of Milanggouwan section in Salawusu River Valley includes 7 layers of paleo-mobile dune sands, and 4 layers of paleo-fixed and semi-fixed dune sands. Their structures have been observed and their grain size, surface textural features and several main chemical elements have been analyzed. The results showed that: 1) Some of the aeolian structural characteristics of these dune sands are similar to that of the recent dune sands. 2) They are also similar to the recent dune sands in grain size components, and parameters of Mz, σ, Sk and Kg, as well as in several main chemical components. 3) The scattergrams of Mz-σ and SiO2-Al2O3+TOFE and the probability curves of grain size showed that these paleo-dune sands are different from paleosols and fluvio-lacustrine facies, but are consistency with recent dune sands. 4) Quartz sands have well roundness and surface textural features such as dish-shaped pits, crescent-shaped pits, pockmarked pits, upturned cleavage plates, siliceous precipitates and siliceous crevasses, indicating that they had been carried for a long time by the wind. As the 11 layers of paleo-dune sands possess the aeolian characteristics in structure, grain size, surface textural features and chemical elements, the origin of their formation should be attributed to eolation.

Keywords

Salawusu River Valley Salawusu Formation paleo-aeolian dune sands aeolian sedimentary characteristics 

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Copyright information

© Science in China Press and Springer-Verlag GmbH 2008

Authors and Affiliations

  • Xianjiao Ou
    • 1
    • 3
  • Baosheng Li
    • 1
    • 2
  • Heling Jin
    • 4
  • Guangrong Dong
    • 4
  • David Dian Zhang
    • 5
  • Zheng Wu
    • 1
  • Xiaohao Wen
    • 1
  • Lanhua Zeng
    • 3
  • Chuntao Ouyang
    • 1
  • Yi Yang
    • 1
  • Yufei Liu
    • 1
  1. 1.School of GeographySouth China Normal UniversityGuangzhouChina
  2. 2.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth EnvironmentCASXi’anChina
  3. 3.Department of GeographyJiaying UniversityMeizhouChina
  4. 4.Cold and Arid Regions Environmental and Engineering Research InstituteCASLanzhouChina
  5. 5.Department of Geography and Geologythe University of Hong KongHong KongChina

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