利用水文地球化学和水文物理学方法分析定襄七岩泉水氡异常

Analysis of radon anomaly in the water of Qiyan spring in Dingxiang by hydrogeochemical and hydrophysical methods

自2008年以来,定襄七岩泉水氡测值处于相对高值状态,为了核实该异常,利用水文地球化学和水文物理学方法进行分析,结果认为:七岩泉泉水补给来源主要是大气降水,当累计连续降雨量超过一定阈值(116 mm)时,水氡测值明显下降;降雨仅对水氡测项的短临动态造成干扰,年变动态不受影响。调查发现,与七岩泉相距不远的静乐井水位出现准同步高值现象,综合分析认为,七岩泉水氡高值异常反映了区域内地壳应力的变化。

Since 2008,the measured value of radon in the water of Qiyan spring in Dingxiang has been relatively high.In order to verify the anomaly,hydrogeochemical and hydrophysical methods are used for analysis.The results show that the water supply source of Qiyan spring is mainly atmospheric precipitation.When the cumulative continuous rainfall exceeds a certain threshold(116 mm),the measured value of radon in the water decreases significantly.Rainfall only interferes with the short-term and impending dynamics of water radon measurement items,and the annual variation dynamics is not affected.It is found that the water level of the jingle well,which is not far from the Qiyan spring,has a quasi-synchronous high value.Through comprehensive analysis,it is considered that the high radon anomaly in the Qiyan spring reflects the change of crustal stress in the region.