Advances in Earth Science

   

Meteoric Cosmogenic Nuclide 10Be Trace the Soil Evolution: Mechanism and Progress

LIU Yu1,2, LIU Jintao3, LIU Chengshuai1, LUO Weijun1,2, CHENG Anyun1,2, WANG Shijie1,2   

  1. (1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry Chinese Academy of Sciences, Guiyang 550081, China; 2. Puding Karst Ecosystem Research Station, Chinese Academy of Sciences, Puding Guizhou 562100, China; 3. The National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing 210098, China)
  • About author:LIU Yu, Associate professor, research areas include cosmogenic nuclide geochronology and landscape evolution.E-mail: liuyu@mail.gyig.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 42330712); Autonomous Strategy Project of the State Key Laboratory of Environmental Geochemistry (Grant No. SKLEG2024104); Chinese Academy of Sciences “Light of West China” Program.

LIU Yu, LIU Jintao, LIU Chengshuai, LUO Weijun, CHENG Anyun, WANG Shijie. Meteoric Cosmogenic Nuclide 10Be Trace the Soil Evolution: Mechanism and Progress[J]. Advances in Earth Science, DOI: 10.11867/j.issn.1001-8166.2024.046..

The soil is currently facing serious pollution, erosion, and degradation in the background of global change, which is threatening the ecosystem stability and food security of China. Quantifying soil formation and evolution (time and rate, etc.) is a critical scientific issue in Earth sciences. Meteoric radioactive isotope 10Be (hereinafter referred to as meteoric 10Be) serves as a natural tracer, with its inventory in soil controlled by soil age, surface erosion, and chemical weathering processes. Therefore, meteoric 10Be is an effective tool for quantitatively tracing the soil formation and evolution over ten million years and has a broad application prospect. Firstly, this article summarizes and reviews the latest progress on the production, delivery, and deposition of meteoric 10Be in the Earth's atmosphere, as well as its accumulation and migration in the soil profile. The reasonable estimation of the long-term deposition rate of meteoric 10Be and its migration in the weathering zones are important challenges that urgently need to be resolved in this field. Secondly, this article introduces the main methods used by meteoric 10Be to estimate soil formation (residence) age, and formation rate, indicating soil erosion and transportation on hill slopes. The key premise for applying meteoric 10Be technology is based on an understanding of geological and environmental processes in the study area and making a rational assessment of the calculation model. With the rapid development of accelerator mass spectrometry analysis capabilities in China will effectively promote the widespread application of meteoric 10Be technology in quantitative research on soil evolution, helping to solve problems such as predicting environmental ecosystem evolution and soil conservation in arable land.
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