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Journal of Desert Research ›› 2022, Vol. 42 ›› Issue (5): 44-53.DOI: 10.7522/j.issn.1000-694X.2022.00012

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Geochemical element composition and spatial distribution characteristics of sediments in the Ningxia-Inner Mongolia section of the Yellow River

Hongli Pang1,2(), Hongshan Gao3, Fuqiang Li4, Lianke Zhang3   

  1. 1.Tourism Department,School of Economics & Management,Shanghai Maritime University,Shanghai 201306,China
    2.Key Laboratory of Desert and Desertification,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    3.College of Earth and Environment Science / Ministry of Education Key Laboratory of Western China's Environment Systems,Lanzhou University,Lanzhou 730000,China
    4.College of Resources and Environment,Gansu Agricultural University,Lanzhou 730000,China
  • Received:2021-11-11 Revised:2022-02-24 Online:2022-09-20 Published:2022-09-22

Abstract:

The Ningxia-Inner Mongolia section of the Yellow River flows through a large area of desert including Tengger Desert, Hedong Sandy Land, Ulan Buh Desert and Kubq Desert, and have formed representative desert-gully alluvial reaches with the interplay of aeolian-sand and flow-sand. We had systematically collected the samples at the river channel and source areas. The results show that sediments in the Ningxia-Inner Mongolia section are rich in SiO2, CaO, Al2O3, Ce, Zr, Hf and Nd, depleted of K2O, Na2O, Rb, Zn, Ni and Sr. Compared with the surrounding source regions, the sediments from the upstream channel of Xiaheyan, Qingshui River, Tengger Desert and Hedong Sandy Land are rich in Co and Ti, depleted in Sr, Ni, Hf and Y. The element contents of Hf, Ni, Y, Zn, MgO and CaO show larger coefficients of variation in the Ningxia-Inner Mongolia section. In the Inner Mongolia section, the sediments from the upstream of the Wuhai channel, Ulan Buh Desert, Kubq Desert and the Kongdui are relatively enriched in Co and Ti, depleted of Hf, Ni and Y, and the elements with larger coefficient of variation are Cr, Hf, Ni, Y, Zn and MgO. The spatial distribution of chemical elements shows an obvious fluctuation with distance, which is mainly controlled by the climate condition, source rocks and sediments input of aeolian and tributaries.

Key words: Ningxia-Inner Mongolia section, chemical elements, source regions, Yellow River

CLC Number: