西秦岭北缘断裂带断层土壤气观测分析

OBSERVATION AND ANALYSIS OF FAULTY GROUND GAS IN THE WESTERN QINLING NORTH FAULT ZONE

对西秦岭北缘断裂带定点台站(马窑、毛集、原家庄)断层土壤气氡、二氧化碳、痕量氢、甲烷观测资料使用正常动态分析方法,从潮汐、气温、气压、降雨方面进行对比分析。分析结果表明:断层土壤气体背景值稳定,与气温呈正相关,与气压呈负相关;断层土壤气能够反应固体潮潮汐变化;气氡、痕量氢和甲烷在地震前表现出明显的临震特点。

Observations of radon,carbon dioxide,trace hydrogen and methane in the soil of fixed stations a⁃long the northern margin of the Western Qin Mountains Fault Zone(Mayao,Maoji,Yuanjiazhuang)were car⁃ried out using the normal dynamic analysis method.The results show that the background value of soil gas on the fault is stable,and has positive correlation with air temperature and negative correlation with air pressure The fault soil gas can reflect the change of tide,and radon,trace hydrogen and methane show obvious charac⁃teristics of impending earthquake before earthquake.