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断层在滑动时的摩擦阻力控制了地震动力学。地震期间摩擦过程释放热量。因此,地震后的断层温度反映了摩擦程度。日本海沟快速钻井项目(Japan Trench Fast Drilling Project,JFAST)(综合海洋钻探计划((Integrated Ocean Drilling Program,IODP)343和343T勘探)在2011年3月日本东北地区近海MW9.0地震16个月后,在海沟附近的断层带上钻孔安装了钻孔温度观测仪,该断层带在地震中滑动了约50m。运行9个月后,回收了全部的传感器组。结果发现板块边界断层的异常温度为0.31℃,相当于地震时每平方米释放了27 MJ热量。该研究结果的表面摩擦系数0.08明显小于大多数岩石的静态值。
The frictional resistance of a fault during sliding controls the seismic dynamics. The friction process releases heat during the earthquake. Therefore, the fault temperature after the earthquake reflects the degree of friction. Japan Trench Fast Drilling Project (JFAST) (Integrated Ocean Drilling Program 343 and 343T Exploration) After 16 months of the offshore Mw9.0 earthquake in northeastern Japan in March 2011 , A borehole temperature observer was drilled in the fault zone near the trench, and the fault slipped about 50m in the earthquake. After 9 months of operation, all the sensor groups were recovered. The results showed that the abnormal temperature of the boundary fault zone 0.31 ° C, equivalent to 27 MJ of heat released per square meter at the time of the earthquake.The surface friction coefficient for this study, 0.08, is significantly less than the static values for most rocks.