闽江口地区地下热水赋存规律
Geothermal water occurrence regularity in Minjiang Estuary Region

在分析闽江口地区地热地质背景的基础上，对区内16处地热点的分布与地形地貌、热储岩性、地质构造、盖层、水化学特征等方面关系进行分析. 结果表明：1）闽江口地区地热资源主要出露在盆地、平原（冲洪积、海积）、沟谷等地势较为平坦地带；2）热储主要为凝灰岩类和花岗岩类两种，以凝灰岩类为主；3）空间上受断裂构造控制明显，富集于北北西向和北东东向构造交汇部位，更易出露于河谷拐弯处；4）地热温度与覆盖层厚度呈正比；5）冷、热水中部分水化组分差异显著，第四系孔隙水、基岩裂隙水混合水以pH值和F-、SO2-4、SiO2为代表，可将其作为地热水化学的标性指标. 在此基础上提出闽江口地区地热资源调查工作建议，为闽江口地区寻找新的地热资源提供科学依据.
This paper introduces the geothermal geological background of Minjiang Estuary Region，and analyzes the relationship of 16 geothermal spots distribution and topography and geomorphology，lithology of geothermal reservoir，geological structure，cover and chemical characteristics. Summarized as follows：1) geothermal resources in Minjiang Estuary Region outcrop in basins，plains，valleys relatively flat area；2) lithology of geothermal reservoir includes tuff and granitoid；3) geothermal resources are controlled obviously by faults in space，enriching in intersections of NNW and NEE tectonic；4) the thicker of the cover，the higher the temperature of geothermal spots；5) there are significantly different between cold and hot water of partially hydrated components，such as pH，F-，SO2-4 and SiO2 in mixed water include quaternary pore waters and bedrock fissure water.they can be regarded as signs of geothermal water. At last，the paper puts effective suggestions to look for new geothermal resources in future