Frictional melting can terminate seismic slips: Experimental results of stick‐slips
Frictional melting can terminate seismic slips: Experimental results of stick‐slips
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DOI：
10.1029/2004gl020642
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发表时间：
2004-11
影响因子：
5.2
通讯作者：
Y. Koizumi;K. Otsuki;A. Takeuchi;H. Nagahama
中科院分区：
文献类型：
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作者：
Y. Koizumi;K. Otsuki;A. Takeuchi;H. Nagahama
通过适当的传感器设置和高速数据采集系统的使用，我们能够在 150 MPa 围压下三轴装置中检测粘滑事件（断层位移 0.32 mm，应力降 230 MPa，上升时间 23 μs，最大滑移速度 40 m/s）期间滑移面熔化的准确时间。一旦开始打滑，摩擦系数从0.55连续下降到0.3，之后摩擦阻力迅速而显着地恢复。这种强化可归因于高阻初始熔化，这是阻止地震滑动的潜在机制。
The appropriate setting of sensors and the use of a high speed data acquisition system enabled us to detect the exact time of melting of the slip surfaces during a stick‐slip event (fault displacement of 0.32 mm, stress drop of 230 MPa, rise time of 23 μs and maximum slip velocity of 40 m/s) in triaxial apparatus at 150 MPa confining pressure. Once slip started, the friction coefficient decreased continuously from 0.55 to 0.3, after which the frictional resistance recovered promptly and remarkably. This strengthening can be attributed to the highly resistive initial melt, a potential mechanism for arresting seismic slips.