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Fig. 11
Schematic sketches of a model that accounts for cementation and migration of active cold
seepage zones (Modified based on Anma et al.
2010
). Vertical scale is exaggerated and arbitrary.
(
a
) Fault rupturing will result in CaCO
3
-saturated fluid flow migrated along the fault plane
and (
b
) precipitated carbonate in nearby sandstones with high pore connectivity and permeability.
(
c
) A hardened ridge front will be formed by repeated rupturing and fluid flow, (
d
) which in turn
act as an indenter for the inner wedge, and as a backstop for the outer wedge (Fig.
10
). A new
bifurcation may be formed behind the ridge front, whereas frontal imbrications may propagate
forward in the outer wedge. (
e
) Seismic cross section with velocity anomaly (After Park et al.
2010
) suggests presence of high velocity zone just above the megasplay fault
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