Fault damage zones and friction : insights from shallow Japan Trench drill core
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The integrated deformation in a fault damage zone provides a record of repeated slip on faults and the properties that control slip behavior. Shear displacement on faults is a frictional phenomenon in the sense that slip begins when the ratio of shear to normal stress surpasses the static friction coefficient (μs). Thus, earthquakes and the associated patterns of slip are controlled by the frictional properties of faults. The March 11, 2011 Mw 9.0 Tohoku-oki earthquake resulted in an unprecedented coseismic slip of >50 m in the shallow portion of the Japan Trench subduction zone. This thesis ...