Research on Geochemical Characteristics and Seismicity of Yilan-Yitong Fault Hot Spring Belt
Based on the research of 8 hot spring spots about 2000 meters underground,such as Shennong Hot Spring,Bielong Hot Spring and Qiaotun Hot Spring on Yilan-Yitong Fault,this article analyzes the water quality type,supply source,water rock equilibrium state and circulation depth of hot spring water,and discusses the impact of hot spring water depth circulation on seismicity.At the same time,laboratory tests are conducted on the hot spring water near the fault to analyze,the contents and changes of Na+,HCO3-,SO42-,Cl-plasma in the under-ground hot spring water,and to explore the relationship between the hot spring water and the seismic activity near the fault zone.A preliminary conclusion is drawn:There are significant differences in the hydrochemical analysis data of hot springs within the research area,,and the concentrations of TDS and anions are higher in the northeast direction,and gradually decrease in the southwest direction;The temperature of hot spring has decreased in recent years,and the seismic activity is less;The contents of TDS and main ions in the research area show spatial distribu-tion characteristics,which are obviously controlled by active structures in spatial distribution.
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