Acta Geographica Sinica ›› 2004, Vol. 59 ›› Issue (2): 189-196.doi: 10.11821/xb200402004

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A Quantitative Analysis for the Provenance of Dune Sand in the Hulun Buir Sandy Land: Application of Stepwise Discriminant Analysis to the Granulometric Data

HAN Guang1, ZHANG Guifang2, YANG Wenbin3   

  1. 1. College of Resources and Environmental Sciences, Hunan Normal University, Changsha 410081, China;
    2. College of Civil Engineering, Hunan University, Changsha 410082, China;
    3. Forestry Academy of Inner Mongolia, Huhhot 010010, China
  • Received:2003-07-23 Revised:2003-09-15 Online:2004-03-25 Published:2004-03-25
  • Supported by:

    CSC special starting fund for scholars returning from abroad, No.[2002]247


Quantitatively determining the provenance of dune sand is one of the problems necessarily and urgently to be solved in geomorphic and desertification research. Based on the granulometric data of sand materials from the Hulun Buir Sandy Land, the stepwise discriminant analysis (SDA) technique for two groups is employed to select the principal factors determining the differences between surface loose sediments. The extent of similarity between two statistical populations can be described quantitatively by three factors such as the number of principal variables, Mahalanobis distance D2 and confidence level ?琢 for F-test. Results reveal that: 1) aeolian dune sand in the region is mainly derived from Hailar Formation (Q3), while fluvial and palaeosol sand also supply partially source sand for dunes; and 2) in the broad valley in the vicinity of Cuogang Town and west of it, the lower reaches of Hailar River, fluvial sand can naturally become principal supplier for dune sand.

Key words: Hulun Buir Sandy Land, granulometric analysis, stepwise discriminant analysis (SDA), dune sand, Hailar Formation, fluvial sand sediments