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本区位于泉州-汕头地震带和政和-海丰地震亚带的东部。新华夏系长乐-诏安构造带纵贯全区,它与早期形成的纬向构造带相复合,构成了强震的发震构造背景。喜山运动以来差异升降运动仍很显著,形成了多个水文地质单元。中酸-酸性火山岩及花岗岩遍布全区,它们与全新世的海相沉积物奠定了本区水文地球化学特征的物质基础。本区的水文地球化学特征:1)地下水中普遍含有HCO_3~-、Cl~-、K~++Na~+、Ca~(++)、Rn、可溶性SiO_2和部
The area is located in Quanzhou - Shantou seismic belt and the political and - the eastern part of the Haifeng earthquake sub-belt. The Xinhuaxia Department of Changle - Zhaoan structural belt runs through the whole area, which is combined with the zonal structure formed in the early stage to form the seismogenic tectonic setting of strong earthquakes. Himalayan movement since the differential movements are still significant, forming a number of hydrogeological units. Acid-acid volcanic rocks and granites all over the region, and they and the Holocene marine sediments laid the hydrogeochemical characteristics of the material base. The hydrogeochemical characteristics of this area: 1) Groundwater contains HCO_3 ~ -, Cl ~ -, K ~ ++ Na ~ +, Ca ~ (++), Rn,