STUDY ON RELATIONSHIP BETWEEN EARTHQUAKE AND HYDRO-GEOCHEMISTRY OF GROUNDWATER IN SOUTHERN PART OF NORTH-SOUTH EARTHQUAKE BELT IN CHINA
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摘要: 本文概述了南北地震带南段的水文地质条件和水文地球化学特征,并编绘了B、F、Li、Sr等微量元素的异常图,分析了水文地球化学与地震的关系。认为(1)构造对地震、地下热水和微量元素的高值区均具有控制作用,它们在空间分布上具有较明显的一致性;(2)高中温热水区(尤其是高中温热泉密集带),常常是地震活动的强烈区,但强震区不一定有高中温热泉密集;(3)在地震孕育过程中,温泉和热水井中的水温、流量和水化学成分均可发生变化。温泉热水中的水化学成分,特别是微量元素变化是地震预报的前兆信息之一。Abstract: This paper outlines hydrogeologic condition and hydro-geochemical feature in the Southern part of North-South Earthquake Belt in China and maps abnormal map of microelements of B,F,Li and Sr. At the same time,the relationship between hydro-geochemical feature and earthquake is analyzed. The research results indicates:(1) Earthquake,geothermal heat and microelement abnormal areas are controlled by tectonic.Their distributions in space are obviously same.(2) High-middle temperature water areas,especially the areas of high-middle heat spring,are always the strong regions of earthquake activity.But the strong earthquake area does not always occur in high-middle heat spring.(3) During the process of earthquake formation water temperature,flow quantity and hydro-geochemical component in geothermal wells and hot springs may be changed. The change of hydro-chemical components,especially microelement in hot springs may be one of information to forecast earthquake.
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