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  • CN 62-1070/P
  • ISSN 1000-694X
  • Bimonthly 1981
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Physicochemical Characteristics of Surface Sediments of Crescent-shaped Sand Dunes in the Hexi Corridor, Gansu, China

  • Pan Kaijia ,
  • Zhang Zhengcai ,
  • Dong Zhibao ,
  • Zhang Caixia ,
  • Li Xingcai
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  • 1. Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China;
    4. School of Physics and Electronic-Electrical Engineering/Nigxia Key Laboratory of Intelligent Sensing for the Desert Information, Yinchuan 750021, China

Received date: 2018-10-21

  Revised date: 2018-12-06

  Online published: 2019-02-14

Abstract

The physicochemical characteristics of aeolian sediments in sand dunes surface is one of the important issue in aeolian geomorphology. The 38 surface sediment samplers had been selected from the crescent-shaped sand dunes, vegetable dunes and lacustrine sediments at the gobi surface in the middle desert of the Hexi Corridor. The physical properties (average particle size, sorting degree, kurtosis, skewness) and chemical properties (major and trace elements) of these sediment samples were analyzed. The results showed that the surface sediments of crescent dunes in Hexi Corridor are mainly of medium sand (21.65%-57.39%), followed by fine sand(23.22%-52.96%). The averaged particle size is 0.27~0.43 mm and larger than other deserts. The sediments from dunes are moderately well sorted and with a near symmetry and mesokurtic distribution. The major elements are mainly Cao and SiO2, 5.55% and 66.12%, respectively. The content of trace elements is similar in the same dune, but the contents are different for different dunes.

Cite this article

Pan Kaijia , Zhang Zhengcai , Dong Zhibao , Zhang Caixia , Li Xingcai . Physicochemical Characteristics of Surface Sediments of Crescent-shaped Sand Dunes in the Hexi Corridor, Gansu, China[J]. Journal of Desert Research, 2019 , 39(1) : 44 -51 . DOI: 10.7522/j.issn.1000-694X.2018.00150

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