对山西4口水化学观测井（泉）及周边地表水进行水化学和氢氧同位素分析，利用Piper图、durov图、Na-K-Mg三角图等方法研究其水化学特征及成因，得出井（泉）水岩平衡程度、热储温度、地下水循环深度及地下水补给来源详情；分析了井（泉）水氡测项映震特征，应用水氡映震效果与水岩平衡程度、地下水循环深度表现出的特征，评价了地震监测效能。评价结果显示夏县井、奇村井优于临猗井，适于开展地震水化学观测；定襄泉应用该水化学方法评价尚存不足之处，需要探索适用于该类观测泉点的物理与化学相结合的评价方法。

After the analysis of the hydrochemical,hydrogen isotope and oxygen isotope in 4 wells (springs) and surface water of its surrounding areas in Shanxi Province by the Piper diagram,durov diagram,and Na-K-Mg triangulation,the equilibrium degree of water rock,the temperature of heat storage,the depth of groundwater circulation and the source of groundwater recharge are observed. The seismic reflection characteristics of the well (spring) water radon measurement are analyzed,and the characteristics of the earthquake monitoring effect are evaluated by using the characteristics of the water radon reflection effect and the water-rock balance and the groundwater circulation depth. The result presents that the Xiaxian well and Qicun well are fitter than the Linyi well to be used to observe hydrochemical characteristics,and Dingxiang well in hydrochemical evaluation is still insufficient,and needs new method.

P315

中国地震局“监测、预报、科研”三结合项目“山西流体观测井水化学特征与监测效能评价指标研究”（3JH-201902011）和山西省地震局科研项目（SBK-1830）共同资助