新疆库尔勒断层氢气浓度影响因素及异常信息提取方法研究  

STUDY ON INFLUENCE FACTORS OF HYDROGEN CONCENTRATION AND ANOMALY INFORMATION EXTRACTION METHOD OF KORLA FAULT IN XINJIANG

作　　者：闫玮[1] 李新勇[1] 杨绍富[2] 徐长银[2] YAN Wei;LI Xin-yong;YANG Shao-fu;XU Chang-yin(Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011,Xinjiang,China;Korla central seismic station of Earthquake Agency of Xinjiang Uygur Autonomous Region,Aksu 841000,Xinjiang,China)

机构地区：[1]新疆维吾尔自治区地震局,新疆乌鲁木齐830011 [2]新疆维吾尔自治区地震局库尔勒地震监测中心站,新疆库尔勒841000

出　　处：《内陆地震》2023年第1期72-79,共8页Inland Earthquake

基　　金：新疆地震科学基金(202005);中国地震局震情跟踪项目(2021010304).

摘　　要：结合新疆库尔勒断层H_(2)观测站的构造位置、台站周边岩性特点、观测方式等,对观测点H_(2)浓度变化特征与辅助气温、气压观测资料进行分析,取得了H_(2)浓度变化的相关系数。对2014年以来断层H_(2)浓度观测数据进行多项式拟合后获得观测资料的残差数据,结合周边历史地震分布得到了地震与异常变化情况的对应关系。研究结果表明:①气压、温度对断层H_(2)浓度有影响,表现为:断层H_(2)浓度与气压呈正相关,相关系数为0.6585,与气温呈负相关,相关系数为-0.7954,气温变化对H_(2)浓度的影响更显著。②断层H_(2)观测站的构造位置、岩性对H_(2)年变化形态是有影响的。③利用Savitzky-Golay拟合后的残差序列,结合历史地震分析,认为在观测站周边200 km范围内发生的M_(S)4.9以上地震前,H_(2)浓度有显著反应,可为震情研判提供参考。Based on the structural location,lithologic characteristics and observation mode of H_(2)observation station in Korla fault,Xinjiang,the characteristics of H_(2)concentration change at observation point and auxiliary air temperature and pressure observation data were analyzed,and the correlation coefficient of H_(2)concentration change was obtained.The residual data of fault H_(2)concentration observed since 2014 were obtained by polynomial fitting,and the corresponding relationship between earthquakes and abnormal changes was obtained by combining with the distribution of surrounding historical earthquakes.The results show that:①Air pressure and temperature have an effect on the concentration of H_(2)on the fault,showing that the concentration of H_(2)on the fault is positively correlated with air pressure(correlation coefficient:0.6585),and negatively correlated with air temperature(correlation coefficient:-0.7954).Temperature change has a more significant effect on the concentration of H_(2).②The tectonic location and lithology of the hydrogen station on the fault have influence on the morphology of H_(2)year change.③Based on the residual sequence of Savitzky-Golay fitting and the analysis of historical seismic data,it is concluded that there is a significant reaction of H_(2)concentration before M_(S) M4.9 earthquakes occurring within 200 km around the observation station,which can provide a reference for the study of seismic conditions.

关 键 词：活动断裂 断层H_(2) 异常特征 影响因素 

分 类 号：P315.7[天文地球—地震学]