广西师范大学学报（自然科学版） ›› 2017, Vol. 35 ›› Issue (1): 16-20.doi: 10.16088/j.issn.1001-6600.2017.01.003

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用加速器质谱技术测定广西乐业天坑的暴露年龄

孟齐1,沈洪涛1,毛立强1,梁维刚1,赵子珍1,梁钊燕1,赖鸣凤1,黄保健2,李世琢3,何明3,姜山3   

  1. 1.广西师范大学物理科学与技术学院,广西桂林541004;
    2.中国地质科学院岩溶地质研究所,广西桂林541004;
    3.中国原子能科学研究院,北京102413
  • 出版日期:2017-01-20 发布日期:2018-07-17
  • 通讯作者: 沈洪涛(1978—),男,广西桂林人,广西师范大学教授。E-mail:shenht@mailbox.gxnu.edu.cn
  • 基金资助:
    国家自然科学基金(11265005,11565008);广西自然科学基金(2014GXNSFCA118018);广西高等学校重点科研资助项目(KY2015ZD015);广西高校中青年教师基础能力提升项目(KY2016YB060);广西研究生教育创新计划项目(XYCSZ2017079)

Determination of Exposure Age of Tiankeng, Leye County of Guangxi by Accelerator Mass Spectrometry

MENG Qi1,SHEN Hongtao1,MAO Liqiang1,LIANG Weigang1,ZHAO Zizhen1,LIANG Zhaoyan1, LAI Mingfeng1,HUANG Baojian2,LI Shizhuo3,HE Ming3,JIANG Shan3   

  1. 1. College of Physics and Technology,Guangxi Normal University,Guilin Guangxi 541004, China;
    2. Institute of Karst Geology,Chinese Academy of Geological Sciences,Guilin Guangxi 541004,China;
    3. China Institute of Atomic Energy,P.O. Box 27550) ,Beijing 102413, China
  • Online:2017-01-20 Published:2018-07-17

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摘要： 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36Cl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。

关键词: 天坑;36Cl;暴露年龄;侵蚀速率;加速器质谱

Abstract: Accelerate mass spectrometry is a nuclide analysis technique with high sensitivity. In this paper, accelerator mass spectrometry is used to measure the content of radionuclide 36Cl in the rocks to study the exposure age of Dashiwei Tiankeng,Leye County of Guangxi, and realize the dating of Dashiwei Tiankeng in Guangxi. The results show that the exposure age of Dashiwei Tiankeng is at least 100-200 thousands years. The study intends to provide a significant reference value for the study of karst relief areas and its evolution.

Key words: Tiankeng, 36Cl, exposure age, erosion rate, AMS

中图分类号: 

  • O571.1
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