U-series isotope constraints on the rates of aeolian-impacted basaltic weathering under tropical climate,Global and Planetary Change

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U-series isotope constraints on the rates of aeolian-impacted basaltic weathering under tropical climate
Global and Planetary Change ( IF 4.0 ) Pub Date : 2024-12-09 , DOI: 10.1016/j.gloplacha.2024.104673
Guodong Ming, Jingyi Huang, Jiaru Sheng, Yingzeng Gong, Jiye Guo, Huimin Yu, Wenhan Cheng, Craig C. Lundstrom, Fang Huang

The chemical weathering of basalt rocks is crucial for stabilizing Earth's habitability and carbon cycle. Currently, the soil chemistry and weathering rates of basalt under significant aeolian influence are not fully understood. This study addresses this gap by investigating the U geochemistry and regolith production rates in a highly weathered basalt profile in Southern China. The εNd(0) values decrease from the bedrock sample (4.68) to the top soils (0.94), indicating aerosol input from the top. Dust accretion decrease downward and significantly affects the vertical distribution of U (R2 = 0.86), while the chemical mobilization of U is controlled by binding with Fe oxides-organic matter complexes (R2 = 0.33).

更新日期：2024-12-09

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