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10 km
Paleo-Zenisu
ridge
Shikoku
Basin
Trench
Hon
sh
u
2
1
T1
Back thrust
1
2
Uplift
T2
Trench
1
Backstop
(Shimanto Belt)
2
3
T3
Uplift
Subsidence
OOST
(Tokai
Thrust)
Reactivated
backthrust
Present erosion level
along the Tenryu Canyon
Uplift
Frontal
thrust
2
Paleo-Zenisu
ridge
Backstop
1
6
5
4
3
New accretionary wedge
T4
Frontal
imbricate
thrust zone
Zone of
large thrust
sequence
Fig. 4
Tectonic model to explain mechanisms from burial to exhumation through time (Modified
after Dominguez et al.
2000
) in the eastern Nankai Accretionary Prism.
Solid stars
show location
of the protolith of the foliated rocks. (
T1
) The protolith of the foliated rocks was buried into the
Nankai prism following the paleo-Zenisu ridge subduction. (
T2
) The buried protolith was accreted
to the Nankai prism after the décollement zone was jumped (
broken red line
). (
T3
) The protolith
was uplifted by OOST motion. (
T4
) Normal faulting was accelerated the OOST motion
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