Rapid Exhumation of Subducted Sediments Along an Out-of-Sequence Thrust in the Modern Eastern Nankai Accretionary Prism - Accretionary Prisms and Convergent Margin Tectonics in the Northwest Pacific Basin - page 225

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