Dynamical weakening of faults by acoustic fluidization

被引：193

作者：

Melosh, HJ

机构：

[1] Lunar and Planetary Laboratory, University of Arizona, Tucson

来源：

NATURE | 1996年 / 379卷 / 6566期

关键词：

D O I：

10.1038/379601a0

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

When a fault slips seismically, some of the energy released may excite strong, short-wavelength vibrations near the fault core. Such vibrations can temporarily reduce the normal stress on the fault, allowing it to slip at lower shear stresses than predicted by laboratory coefficients of friction. This phenomenon of 'acoustic fluidization' provides an alternative to theories that invoke pressurized fluids as an explanation for why some faults appear to be so weak.

引用

页码：601 / 606

页数：6

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