关键词: 绿泥石片岩, 斜长角闪岩, 高温高压实验, 波速, 电导率

Abstract: The conductivity,P-wave velocity and the strengh of chlorite-schist and plagiochase amphi-bolite were measured at high P T conditions.It has been shown that the dehydration of water-bearing minerals wolild lend to abnormal changes of physical and mechanical properties.The dehydrating temperature decreased with increasing pressure at semi-sealed condition. It has beenpresented that the dehydration of water-bearing minerals in chlorite-schist and plagichase amphi-bolite should be the cause of the low-velocity/high conductivity layer(or body)in North Chinacrust,This layer(body)should also be a soft layer(body)with low strgngth,favourable to theoccurrence of earthquake.

Key words: Chlorite-schist, Plagichase amphiboite, High temperature and high pressure, P-wave velocity, Conductivity