EGU2020-3894
https://doi.org/10.5194/egusphere-egu2020-3894
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

A wind-tunnel study on the sorting effects of wind erosion towards the geochemistry and the particle size of the surface samples from the Horqin sandy land

Caixia Zhang and Xiaobo Wang
Caixia Zhang and Xiaobo Wang
  • Northwest Institute of Eco-environment and Resources, Chinese Academy of Sciences, China (zhangcaixia@lzb.ac.cn)

Samples from the Horqin sandy land were exposed to a series of wind velocities and the sink particles were collected at the end of the diffusion section of a wind tunnel. The resulting grain size was coarser than the original one, and the original samples showed lower average content of the SiO2 and higher average content of Al2O3, Fe2O3, MgO, CaO, Na2O, and K2O than the collected samples did. Comparing with other dust source area in China, the Horqin sandy land had higher content of the Zr, Ba, SiO2, Al2O3 and K2O. Compared with the average upper continental crust (UCC) composition, surface samples were rich in the content of the Y, Zr, Nb, Ba, La, Nd. Geochemistry characteristics of the fine grain components of the Horqin sandy land differ from those from other dust source regions, because the fine-grained particles in the Horqin sandy land were mostly derived from various local deposits formed in its unique depositional environments controlled by several tectonic activities.

How to cite: Zhang, C. and Wang, X.: A wind-tunnel study on the sorting effects of wind erosion towards the geochemistry and the particle size of the surface samples from the Horqin sandy land, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-3894, https://doi.org/10.5194/egusphere-egu2020-3894, 2020