北京地区断层泉水文地球化学特征

摘要

This paper reports the hydrogeological and hydro geochemical investigations carried out on the Yanhecheng new springs and the Songshan springs regions. Compared to the different categories of groundwater, the hydro geochemical features of the Yanhecheng new springs and the Songshan spring are analyzed. The result shows that pH value is 7.88 averaged and is HCO3-Ca type of water chemistry. The chemical geochemical properties of the two springs are stability, and not affected by human impact. The two springs of hot water may be from the same geothermal reservoir with estimated temperature 60.6℃averagely, and 1.3 km depth. The Songshan spring is stable chemically in recent years, and is not be affected by human impact significantly. Geothermal reservoir temperature is 112℃, and the depth is 1.8 km. It should be significant to strengthen precursor observation in fault springs.%对门头沟沿河城新泉和延庆松山泉区域开展水文地质和水文地球化学调查工作。通过与不同类别地下水对比，分析了沿河城新泉和松山泉水文地球化学特征。结果显示，沿河城1号泉、2号泉pH值平均7.88。水化学类型均为HCO3—Ca型。2个泉水化学地球化学性质稳定，未受到人为影响。2个泉点地下水可能来自同一热储，估算温度平均为60.6℃，深度平均为1.3 km。松山泉近年来水化学性质稳定，未受到人为明显影响。热储温度为112℃，深度为1.8 km。沿河城泉和松山泉处于特殊构造部位，水化观测具映震前兆响应，今后应当继续加强观测。