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加速器质谱技术(AMS)是一种高灵敏的核素分析技术。本文利用加速器质谱技术测定岩石中原地宇生放射性核素~(36)Cl含量来研究广西乐业大石围天坑的暴露年龄,实现了对广西大石围天坑的定年。研究结果表明,大石围天坑的最低暴露年龄为10~20万年。该研究为喀斯特地貌及演化提供重要参考价值。
Accelerator Mass Spectrometry (AMS) is a highly sensitive nuclide analysis technique. In this paper, we used accelerator mass spectrometry to determine the ~ (36) Cl content of terrestrial uranium in rocks to study the exposure age of Dashiwei tiankeng in Leye, Guangxi and realized the dating of Dashiwei tiankeng in Guangxi. The results show that the minimum exposure age of Dashiwei tiankeng is 10 ~ 200000 years. The study provides important reference value for karst landform and evolution.