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Journal of Desert Research ›› 2023, Vol. 43 ›› Issue (4): 107-117.DOI: 10.7522/j.issn.1000-694X.2023.00005

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Relationship between constant elements and granularity of the surface sediment in the Kubuqi Desert

Qingshuang Meng(), Hejun Zuo(), Min Yan, Haibing Wang, Cheng Xi   

  1. College of Desert Control Science and Engineering / Inner Mongolia Key Laboratory of Aeolian Physics and Desertification Control Engineering,Inner Mongolia Agricultural University,Hohhot 010018,China
  • Received:2022-10-19 Revised:2023-02-11 Online:2023-07-20 Published:2023-08-14
  • Contact: Hejun Zuo

Abstract:

The weathering process of surface sediments causes the migration or enrichment of elements in each grain level. Granularity classification can deeply explain the relationship between elements and granularity. The coverage of different vegetation in the Kubuqi Desert was selected to determine the element content of grain size distribution characteristics.The results show that: (1) The Kubuqi Desert is mainly dominated by fine sand and extremely fine sand (both account for more than 85%), and the constant elements are mainly SiO2 and Al2O3 (accounting for more than 80% and showing the opposite relationship), while other elements have low content; the enrichment of different granular components is different. (2) CPA(60.2-85.9), CIA(28.08-53.06) value of surface sediment shows that the area is in unweathered or weakly weathered state; the study area shows rich SiO2, CaO, Fe2O3, K2O, TiO2 poor Al2O3 and Na2O; SiO2 and K2O are significantly positively correlated with particle size, Fe2O3, CaO, Al2O3, MgO and TiO2 are significantly negatively correlated with particle size, and Na2O is not controlled by particle size. (3) Before classification, the four elements of CaO, SiO2, MgO and TiO2 are related with the particle size; after classification, SiO2, K2O, Fe2O3, CaO, Al2O3, MgO and TiO2 all have certain correlation with the particle size segment, detailed grading can indeed interpret more information contained in the elements.

Key words: Kubuqi Desert, sediment particle sizes, geo-chemistry elements, granularity effect

CLC Number: