怀来4井水汞映震机理分析

分析了河北省怀来县后郝窑热田区的构造特征和怀来4井井孔成孔条件，研究了怀来4井水汞异常与地震的关系，分析该井的映震灵敏性，认为有以下几个方面的原因：①该井处于热田区活动断裂上；②含水层母岩为糜棱岩化片麻岩及泥质物塑状体，怀来4井水汞映震异常与其所处独特的地质构造、成孔条件及汞的物理化学性质的有机结合密不可分，因而有较好的映震效果。

Analysis of the relationship between the water mercury anomaly in Huailai 4 well and earthquakes and its mechanism

In this text, geothermic structural feature of Houhaoyao thermic field in Huailai and borehole condition of Huailai 4 well are analyzed. The relationship between the water mercury anomalies at the well and the earthquakes are studied. The sensitivity of mercury anomalies to the earthquake occurrence can by owed to that the well is located at the active fault zone in the geothermic field and the aquifer is milonitized gneiss and douke plastic mud. The water mercury anomaly at Huailai 4 well is relied on the special geological site, well hole condition and the physical and chemical property of mercury, so it has good correlation with earthquakes. Key words, geolo anom gical structure of geothermic field, well hole condition, water mercury aly, anomaly mechanism