依兰—伊通断裂北段断层氢气的地球化学特征分析  

Analysis of geochemical characteristics of hydrogen in fault gases in the north section of Yilan-Yitong fault

作　　者：康健 徐岳仁[2] 姜云爽 杜天然 马艳丽 李继业 KANG Jian;XU Yueren;JIANG Yunshuang;DU Tianran;MA Yanli;LI Jiye(Heilingjiang Earthquake Agency,Harbin 150090,China;Institute of Earthquake Forecasting,China Earthquake Admimistraiton,Beijing 100036,China;Zhaodong Earthquake Agency,Heilongjiang Province 151100,China)

机构地区：[1]黑龙江省地震局,中国哈尔滨150090 [2]中国地震局地震预测研究所,中国北京100036 [3]肇东市地震局,中国黑龙江151100

出　　处：《地震地磁观测与研究》2020年第4期111-120,共10页Seismological and Geomagnetic Observation and Research

基　　金：黑龙江省地震局重点科研项目(项目编号:201701);中国地震局地震科技星火计划项目(项目编号:XH19011)。

摘　　要：2017—2018年在依兰—伊通断裂黑龙江段开展断层氢气调查工作,沿断裂选取8个剖面进行跨目标断层观测及土壤氢气采样。结果表明:①断层氢气浓度常存在异常变化;②不同类型的断层,氢气浓度异常变化幅度没有明显差异;③走滑断层异常特征一般为断层两侧低、中间高,呈现“低—高—低”的特点;倾滑断层异常特征一般为断层的上盘略高、下盘略低;④断层氢气排放不仅受微观局部断层的影响,更受宏观的地震活动性大环境的影响。A fault gas survey was carried out in the Heilongjiang section of the Yilan-Yitong fault from 2017 to 2018.Eight cross-fault profiles were selected along the fault for soil hydrogen sampling.The data clearly reveal the characteristics of gas anomalies at specific locations in profiles.The results of comprehensive fault structure data,topographic and geomorphological characteristics,and fault gas observation show that:①Hydrogen concentration on faults often shows abnormal changes;②For different types of faults,there is no obvious difference in the abnormal variation range of hydrogen concentration;③The hydrogen concentrations on strike-slip faults are generally low on both sides and high in the middle,showing the characteristics of“low-high-low”;the hydrogen concentrations on dip-slip faults are generally slightly high in the upper wall and slightly low in the lower wall;④Fault gas emission is not only affected by micro-faults,but also by the macro-seismic environment.

关 键 词：依兰—伊通断裂 地球化学探测 氢气 地球化学特征 

分 类 号：P315[天文地球—地震学] P632[天文地球—固体地球物理学]