Effects of Wind Speed on Dust Generation Mechanisms and Geochemical Element Fractionation during Collisional Abrasion of Desert Sand Grains

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this study selected the Badain Jaran, Tengger, Ulan Buh, and Hobq deserts in western Inner Mongolia, China, as the target deserts, and collected sand grains from dune crests. Collision-abrasion dust-generation experiments were conducted under four controlled wind speeds of 5, 8, 11, and 15 m/s. During the experiments, the PM10 mass, concentration, and particle-size distributions of the generated dust were monitored simultaneously, together with the mass loss of sand grains after collision-abrasion and the grain-size distributions and morphological characteristics of both source and residual sands. The major, trace, and rare earth element compositions of the source sands, residual sands, and PM10 were then determined.

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