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Figure
1.4 : Three views of a crustal-scale strike-slip fault. Map view
illustrates the fault as a zone of deformation. Cross section A-A' in the
fault plane includes a contour map of the slip (u) which goes to zero at
the fault tipline and is greatest near the hypocenter (star). Cross section
B-B' perpendicular to the fault plane suggests that slip mechanisms are
frictional resistance (FR) in the upper part of the crust and localized
quasi-plastic flow (QP) in the lower part. The graph at the right indicates
a linearly increasing resistance to shearing with depth to the brittle-ductile
transition, and then a non-linear decreasing resistance to shearing with
depth. Reprinted from (Sibson, 1989) with permission from Elsevier. |
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