乌鲁木齐10号泉地下水中溶解气甲烷的映震特征

从甲烷的来源及其化学特征入手，结合19年来的震例，分析了乌鲁木齐10号泉水中溶解气甲烷的映震特和下，结果表明，震前甲烷含量基本上呈正异常,一般在甲烷含量由高值变低时发震，个别地震在甲烷测值上升的过程中或恢复至背景值后数天至数十天发震，最后，初步认定了特殊的地震构造环境是该泉具有映震灵敏性的原因。

Characteristics of earthquake precursory for dissolved C H4 in ground water at the No.10 spring, Urumqi

Based on the chemical character and origin of the dissolved CH 4 in ground water,The characteristics of seismic precursory of the dissolved CH 4 in ground water at the No 10 spring,Urumqi are analyzed with many earthquake examples within the duration 19 years.It is found that the content of dissolved CH 4 in groundwater before earthquakes basically appears the positive anomaly, the earthquake occur when the anomaly from high to low value or the anomaly return to normal value. Finally, it is believed that the special seismotectonic environment is the reasons that the CH 4 content in the spring have the higher sensitivity for earthquake precursory.