The hydrochemical characteristics and its significance of geothermal water in both sides of large fault: Taking northern section of the Liaokao fault in north China as an example  

作　　者：Bao-jian Zhang Tian Zhao Yan-yan Li Yi-fei Xing Gui-ling Wang Jun Gao Xian-chun Tang Wen-zhen Yuan Dai-lei Zhang 

机构地区：[1]Chinese Academy of Geological Sciences,China Geological Survey,Ministry of Natural Resources,Beijing 100037,China [2]SinoProbe Center,Chinese Academy of Geological Sciences,China Geological Survey,Ministry of Natural Resources,Beijing 100037,China [3]Institute of Hydrogeology and Environmental Geology,Chinese Academy of Geological Sciences,China Geological Survey,Ministry of Natural Resources,Shijiazhuang 050061,China

出　　处：《China Geology》2019年第4期512-521,共10页中国地质（英文）

基　　金：This research was financially supported by China Geological Survey Project(DD20189114,DD20190129);the Basic Scientific Research Project of the Chinese Academy of Geological Sciences(JKY1722,YWF201903-01 and JYYWF20180501).

摘　　要：Based on comparative analysis on hydrochemical characteristics of geothermal water in the north part of Liaokao fault,this research focuses on studying the indicative significance of hydrochemical characteristics for the formation of geothermal water.The result shows that:(1)There is no obvious hydraulic connection between the karst geothermal water(occurred in the east part of the Liaokao fault)and the sandstone geothermal water(occurred in the west part of Liaokao fault).(2)In a close hydrological environment,caused by tectonic activities,geothermal water remains longer time in reservoir,hence the water-rock interaction is more complete,with high degree of concentrations,whereas the renewable capacity of the water is weaker.(3)There is no high temperature mantle source fluid mixed in the geothermal water.Karst geothermal water occurred deep circulatory convection along Liaokao fault and its secondary fault,therefore there is deep crust source fluid added into the geothermal water,closer to the Liaokao fault,the greater affected by the deep crust fluid.However,sandstone geothermal water has weak deep circulatory convection.

关 键 词：GEOTHERMAL survey engineering Large-scale FAULT HYDROCHEMISTRY GEOTHERMAL water ZONAL characteristics Indicative MEANING Liaokao FAULT North China 

分 类 号：P314.1[天文地球—固体地球物理学]