【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。更多还原

【Abstract】 The characteristics of hydrothermal activity and earthquake activity in the southern Zhangjiakou are studied. The result indicates that the faulting strength will reduce owing to the effect of chemical and physical act of ground fluid on fault and its surrounding rocks, and this effect will be intenser with the increase of temperature and circulation depth of the fluid. It is suggested that the underground fluid will play a great role in the earthquake preparation and occurrence.更多还原