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浙江大学学报（理学版）
浙江大学学报（理学版）  2020, Vol. 47 Issue (3): 355-361    DOI: 10.3785/j.issn.1008-9497.2020.03.013
地球科学     
青海乐都断层气氡的年变异常特征分析
刘磊, 李霞, 赵玉红, 冯丽丽, 马茹莹
青海省地震局，青海 西宁 810001
Analysis on the anomaly characteristics of fault gas radon annual variation in Ledu of Qinghai
LIU Lei, LI Xia, ZHAO Yuhong, FENG Lili, MA Ruying
Qinghai Earthquake Administration，Xining 810001, China
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摘要： 在地震预报研究中，断层气观测具有重要意义。以青海乐都断层气氡的观测资料为基础，结合该测点的环境变化特征、地球化学特征、震例等及其机理分析，认为乐都断层气氡在门源6.4级地震前有较好的前兆指示意义。2017年，因附近河道施工改造，影响断层气的运移路径，引起观测数据年形态改变。这些现象表明，该测点位于构造活动敏感部位，具有较好的映震效能，当异常出现时，排除环境及观测系统干扰后，可作为震情跟踪的重要依据。
关键词： 异常特征;  机理分析;  断层气氡;  地球化学    
Abstract: Fault gas observation plays an important role in earthquake prediction.This paper studies further and discusses on long-term observational data of fault gas radon in Ledu. In conjunction with the analysis on observation environment interference, geochemical characteristics and so on,it is found that fault gas radon reveals obvious precursor characteristic before the Menyuan Ms6.4 earthquake, In 2017, the annual variation was broken due to river reconstruction and the fault gas migration path was affected. These phenomenon indicate that fault gas radon of Ledu of Qinghai is located in the area of tectonic activity. It’s able to reflect earthquake precursors if we can exclude the interference from the observation working system and environment through formation mechanism analysis, hence applicable to earthquake monitoring.
Key words: fault gas radon    anomaly characteristics    geochemistry    mechanism analysis
收稿日期: 2019-04-18 出版日期: 2020-06-25
CLC:  P315.72+4  
基金资助: 青海省地震科学基金项目（2019A04）；中国地震局地震科技星火计划项目（XH20063Y）；中国地震局震情跟踪定向任务（2019010413）.
作者简介: 刘磊（1987—），ORCID:http:orcid.org//0000-0003-1733-5889，男，硕士，工程师，主要从事地震地下流体及构造地球化学流动观测研究，E-mail:liu_leiy@163.com.
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引用本文:

刘磊, 李霞, 赵玉红, 冯丽丽, 马茹莹. 青海乐都断层气氡的年变异常特征分析[J]. 浙江大学学报（理学版）, 2020, 47(3): 355-361.

LIU Lei, LI Xia, ZHAO Yuhong, FENG Lili, MA Ruying. Analysis on the anomaly characteristics of fault gas radon annual variation in Ledu of Qinghai. Journal of Zhejiang University (Science Edition), 2020, 47(3): 355-361.

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https://www.zjujournals.com/sci/CN/10.3785/j.issn.1008-9497.2020.03.013    或    https://www.zjujournals.com/sci/CN/Y2020/V47/I3/355

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