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Journal of Desert Research ›› 2020, Vol. 40 ›› Issue (5): 158-168.DOI: 10.7522/j.issn.1000-694X.2020.00088

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Spatial variations of grain size parameters of dune sands in the Mu Us Sandy Land and Hobq Sand Sea, northern China and its potential causes

Qianqian Liu1(), Xiaoping Yang2()   

  1. 1.Institute of Chinese Historical Geography,Fudan University,Shanghai 200433,China
    2.School of Earth Sciences,Zhejiang University,Hangzhou 310027,China
  • Received:2020-07-16 Revised:2020-08-21 Online:2020-09-28 Published:2020-09-28
  • Contact: Xiaoping Yang

Abstract:

We collected and measured aeolian sand samples from the Mu Us Sandy Land and the Hobq Sand Sea of northern China. The data of grain sizes show that aeolian sands in the eastern and western Mu Us Sandy Land are quite different. The aeolian sands in the western Mu Us Sandy Land are much finer and better sorted compared with those in the eastern Mu Us Sandy Land. Aeolian sands in the Hobq Sand Sea show similar grain size characteristics to those of the western Mu Us Sandy Land. We conclude that the initial grain sizes of source materials could be the main factors for the regional variations across these aeolian environments. Local detritus act as an important provenance for aoelian sands of Mu Us Sandy Land and Hobq Sand Sea, and its contribution varies regionally. Influenced by complicated provenances and mixed transportation by winds and rivers, the values of mean grain size (Mz) and sorting coefficient (σ) do not show obviously spatial variations which would be associated with the prevailing wind directions in the study areas.

Key words: geomorphology, dune, grain size parameter, spatial analysis

CLC Number: