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http://dx.doi.org/10.9720/kseg.2013.3.217

Friction-dependent Slip Behavior of Imgok Fault under the Present-day Stress Field  

Na, Hyun-Woo (Geology and Earth Environmental Sciences, Chungnam National University)
Chang, Chandong (Geology and Earth Environmental Sciences, Chungnam National University)
Chang, Chun-Joong (Central Research Institute, Korea Hydro & Nuclear Power)
Publication Information
The Journal of Engineering Geology / v.23, no.3, 2013 , pp. 217-225 More about this Journal
Abstract
We carried out geometrical, kinematic, and geomechanical analyses on a lineament (the Imgok fault) near Gangneung, observed in ASTER images and aerial photographs, and field surveys. Earthquake focal mechanism solutions, used to estimate the present-day stress state, revealed that the direction of maximum compression is approximately N$70^{\circ}$E and that the stress condition is in favor of either strike-slip or reverse movement on the fault. The strike of the fault is not ideal for slip under the present-day stress field and thus the fault has a low slip tendency. However, the fault may be able to slip if the frictional coefficient (${\mu}$), representing the resistance of the fault to slip, is sufficiently low (e.g., ${\mu}$ < 0.25).
Keywords
Imgok fault; geomechanics; present-day stress; slip tendency; frictional coefficient;
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Times Cited By KSCI : 7  (Citation Analysis)
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