THE FRICTIONAL BEHAVIOR OF LIZARDITE AND ANTIGORITE SERPENTINITES - EXPERIMENTS, CONSTITUTIVE MODELS, AND IMPLICATIONS FOR NATURAL FAULTS

被引：148

作者：

REINEN, LA

WEEKS, JD

TULLIS, TE

机构：

[1] Department of Geological Sciences, Brown University, Providence, Rhode Island

来源：

PURE AND APPLIED GEOPHYSICS | 1994年 / 143卷 / 1-3期

关键词：

ROCK FRICTION; FAULT MECHANICS; EARTHQUAKES; SERPENTINE; CONSTITUTIVE BEHAVIOR;

D O I：

10.1007/BF00874334

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Laboratory studies of the fractional behavior of rocks can provide important information about the strength and sliding stability of natural faults. We have conducted friction experiments on antigorite and lizardite serpentinites, rocks common to both continental and oceanic crustal faults. We conducted both velocity-step tests and timed-hold tests on bare surfaces and gouge layers of serpentinite at room temperature. We find that the coefficient of friction of lizardite serpentinite is quite low (0.15-0.35) and could explain the apparent low stresses observed on crustal transform faults, while that of antigorite serpentinite is comparable to other crustaI rocks (0.50-0.85). The frictional behavior of both types of serpentinite is well described by a two-mechanism model combining state-variable-dominated behavior at high slip velocities and dow-dominated behavior at low velocities. The two-mechanism model is supported by data from velocity-step tests and timed-hold tests. The low velocity behavior of serpentinite is strongly rate strengthening and should result in stable fault creep on natural faults containing either antigorite or lizardite serpentinite.

引用

页码：317 / 358

页数：42

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