Two Contrasting Kinematic Styles of Active Folding Above Thrust Ramps, Western Taiwan
Published:January 01, 2011
Li-Fan Yue, John Suppe, Jih-Hao Hung, 2011. "Two Contrasting Kinematic Styles of Active Folding Above Thrust Ramps, Western Taiwan", Thrust Fault-Related Folding, K. McClay, J. Shaw, J. Suppe
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Two adjacent active thrust ramps in western Taiwan show contrasting hanging-wall structural geometries that suggest different kinematics, although they involve the same stratigraphic section and basal detachment. The Chelungpu thrust shows a classic fault-bend folding geometry, which predicts folding by kink-band migration without limb rotation, whereas the hanging wall of the Changhua thrust shows the characteristic geometry of a shear fault-bend folding, which predicts a progressive limb rotation with minor kink-band migration. We test the kinematic predictions of classical and shear fault-bend folding theories by analyzing deformed flights of terraces and co-seismic displacements in the 7.6 moment magnitude scale...