CREEP, COMPACTION AND THE WEAK RHEOLOGY OF MAJOR FAULTS

被引：357

作者：

SLEEP, NH ^{[1
]}

BLANPIED, ML ^{[1
]}

机构：

[1] US GEOL SURVEY,MENLO PK,CA 94025

来源：

NATURE | 1992年 / 359卷 / 6397期

关键词：

D O I：

10.1038/359687a0

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：

Field and laboratory observations suggest that the porosity within fault zones varies over earthquake cycles so that fluid pressure is in long-term equilibrium with hydrostatic fluid pressure in the country rock. Between earthquakes, ductile creep compacts the fault zone, increasing fluid pressure, and finally allowing frictional failure at relatively low shear stress. Earthquake faulting restores porosity and decreases fluid pressure to below hydrostatic. This mechanism may explain why major faults, such as the San Andreas system, are weak.

引用

页码：687 / 692

页数：6

共 52 条

[31] The geologic role of dilatancy [J].