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Low frictional strength of quartz rocks at subseismic slip rates

Low frictional strength of quartz rocks at subseismic slip rates Laboratory experiments on rocks at low sliding velocity typically yield values of the friction coefficient of 0.6–0.85. Here we demonstrate that an extraordinary decrease in friction coefficient accompanies sliding of ‘room dry’ quartz rocks at rates faster than in most laboratory experiments, but slower than seismic slip rates. In some cases, the friction coefficient decreases from low‐speed values by more than a factor of 3. This extraordinary weakening likely results from the formation of finely comminuted, amorphous, wet material on the sliding surface. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Geophysical Research Letters Wiley

Low frictional strength of quartz rocks at subseismic slip rates

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References (39)

Publisher
Wiley
Copyright
Copyright © 2002 by the American Geophysical Union.
ISSN
0094-8276
eISSN
1944-8007
DOI
10.1029/2002GL015240
Publisher site
See Article on Publisher Site

Abstract

Laboratory experiments on rocks at low sliding velocity typically yield values of the friction coefficient of 0.6–0.85. Here we demonstrate that an extraordinary decrease in friction coefficient accompanies sliding of ‘room dry’ quartz rocks at rates faster than in most laboratory experiments, but slower than seismic slip rates. In some cases, the friction coefficient decreases from low‐speed values by more than a factor of 3. This extraordinary weakening likely results from the formation of finely comminuted, amorphous, wet material on the sliding surface.

Journal

Geophysical Research LettersWiley

Published: Sep 1, 2002

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