SEISMOLOGY AND GEOLOGY ›› 1979, Vol. 1 ›› Issue (4): 61-71.
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Meng Shude, Chen Shuhai
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孟淑德, 陈淑海
Abstract: The relationship between the hydrogeochemical changes involving SO4=, Cl-, Ca++, and Mg++ in groundwater and earthquakes indicates that the chemical composition of many wells had changed before both the Haicheng earthquake (M = 7.3) and the Tang-shan earthquake (M = 7.8). On this background the mechanism of such hydrogeochemical changes is explored.The external cause of the hydrochemical changes in groundwater may be traced mainly to the changes of temperature and pressure. In the Panjin region, Liaoning Province, the changes in strata stress and flow pressure before the two earthquakes mentioned above distinctly reflect an increment of pressure near the ground surface at a distance of several hundred kilometers from the epicenters.The variations of SO4= and Cl- on the explosion experiments and the Mg-ion increase in the process of water-turbidity before shocks imply the influence of pressure on the hydrochemical changes. The hydrogeochemical changes before shocks seem to be mostly caused by the strain of stressed water-bearing horizon and its country rocks.
摘要: 通过水文地球化学(地下水中SO4=、Cl-、Ca++、Mg++)资料的积累,表明许多井点在海城7.3级与唐山7.8级大震前水化学成分是有反应的。 在此基础上,对震前水浑过程Mg++的升高以及爆破实验的研究,探讨了水文地球化学变化的机制。认为震前水文地球化学的变化,除深层物质上涌外,多数是含水层及其围岩受应力作用产生应变的过程中发生的。
Meng Shude, Chen Shuhai. ON THE PROBLEM OF HYDROGEOCHEMICAL PREDICTION OF EARTHQUAKES FROM A FEW OF EVENTS[J]. SEISMOLOGY AND GEOLOGY, 1979, 1(4): 61-71.
孟淑德, 陈淑海. 从几个震例来探讨水文地球化学预报地震的若干问题[J]. 地震地质, 1979, 1(4): 61-71.
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