地下流体在地震孕育与发生中的作用——以张家口南部地热活动区为例  

Effect of ground fluid in the earthquake preparation and occurrence——taking geothermal area in the southern Zhangjiakou as an example

作　　者：王基华[1] 林元武[1] 刘成龙[1] 

机构地区：[1]中国地震局地质研究所,北京100029

出　　处：《地震》2000年第z1期115-118,共4页Earthquake

基　　金：地震科学联合基金资助!(950 74 33)

摘　　要：对张家口南部地热活动区的水热活动特征及地震活动性进行了研究 ,结果表明 ,由于地下流体对断裂及其围岩的化学、物理作用 ,使断裂强度降低 ,而且随着流体温度的增高 ,循环深度的加深 ,这种作用将愈加强烈。表明地下流体在地震的孕育和发生中起着显著的作用。The characteristics of hydrothermal activity and earthquake a ctivity i n the southern Zhangjiakou are studied. The result indicates that the faulting s trength will reduce owing to the effect of chemical and physical act of ground f luid on fault and its surrounding rocks, and this effect will be intenser with t he increase of temperature and circulation depth of the fluid. It is suggested t hat the underground fluid will play a great role in the earthquake preparation a nd occurrence.

关 键 词：地下流体 地震活动性 循环深度 水-岩作用 

分 类 号：P315[天文地球—地震学]