西秦岭北缘断裂带土壤气定点观测台站建设分析  

Construction of fixed-point observation stations of the soil gas along the northern margin fault of West Qinling

作　　者：赵洁 苏鹤军 高曙德 杨超 郭赟[3] 孟维斌 王文熙 田洁 ZHAO Jie;SU Hejun;GAO Shude;YANG Chao;GUO Yun;MENG Weibin;WANG Wenxi;TIAN Jie(Gansu Earthquake Agency,Lanzhou 730000,Gansu,China;Gansu Lanzhou Geophysics National Observation and Research Station,Lanzhou 730000,Gansu,China;Kangding Seismic Monitoring Center Station,Sichuan Earthquake Agency,Kangding 626299,Sichuan,China;Tianshui Earthquake Agency,Tianshui 741000,Gansu,China)

机构地区：[1]甘肃省地震局,甘肃兰州730000 [2]甘肃兰州地球物理国家野外科学观测研究站,甘肃兰州730000 [3]四川省地震局康定地震监测中心站,四川康定626299 [4]天水市地震局,甘肃天水741000

出　　处：《地震工程学报》2023年第2期447-456,共10页China Earthquake Engineering Journal

基　　金：甘肃省地震局科技发展野外站基金(ZX2117004)。

摘　　要：介绍西秦岭北缘断裂带土壤气观测台站的设计思路、建设内容以及运行情况,并通过一年来观测数据的分析认为,各观测台站断层土壤气体背景值稳定,观测数据合理可靠,且3个观测站同一测项的变化形态具有相似性、同步性,并在榆中M_(S)3.6、玛多M_(S)7.4和门源M_(S)6.9地震前出现同步异常响应,表明西秦岭北缘断裂带土壤气具有反映区域构造应力变化的潜力。同时断层土壤气定点观测台站的建设方案与技术指标为后期组建断层土壤气观测台网提供借鉴和参考,为进一步推广应用奠定良好基础。In this paper,the design idea,construction content,and operation of three soil gas observation stations along the northern margin fault of West Qinling are introduced.Through an analysis of observation data in the past year,the background values of soil gas observed by the stations are considered stable,and the observation data are considered reasonable and reliable.The change patterns of the same measurement item at the three observation stations are similar and synchronous,and synchronous abnormal responses occurred before the Yuzhong M_(S)3.6,Maduo M_(S)7.4,and Menyuan M_(S)6.9 earthquakes.This finding shows that the soil gas along the northern margin of West Qinling potentially reflects the changes in regional tectonic stress.Furthermore,the construction scheme and technical indicators of fixed-point observation stations for fault soil gas provide a reference for establishing a fault soil gas observation network in the study area and lay a good foundation for further promotion and application.

关 键 词：西秦岭北缘断裂带 断层气 连续观测 台站建设 

分 类 号：P315[天文地球—地震学]