12.5 Subduction Complexes
591
c
SHIMANTO BELT, JAPAN
14 Ma GRANITE
PLlO·PLEISTOCENE S.C .
NANKAI
TROUGH
~-...----"'--------------'~-...,...-----' ' - - - - - , , - - - - "
5
JURASSIC
GRETA . S.G. TERTIARY
S.C.
S.G.
50 km
- - - SHIMANTO BELT - - -
d
FLYSGH
MELANGE UNIT
GLASTIG DIKE
UNIT
SLATY CLEAVAGE
GEANIG
GRUS'T
OCEANIC BASEMENT
e STRATIGRAPHY OF
MELANGE UNlT
(IDEALIZED)
TURBIDITES AND
SHALES
(TRENCH FILL)
VARIGO l ORED HEMIPEL.
SHALE AND AGIDIG TUFF
RED PELAGIG SHALE
BEDDED
RADIOLARIAN
CHERT
DUCTILE FOLD
OLLEMENT
SCALE FOLIATION
BASALT SllVER
Fig. 12.24. Cretaeeous to Mioeene aeeretionary
prism of the Shimanto belt, southeastem Japan.
a,b Loeation maps. c Cross seetion from modem
Nankai trough to Shikoku island, showing inereasing
age of subduetion eomplexes S. C. d Idealized eross
RED PELAGIG SHALE
AND/OR NANNO·LlME.
STONE
OGEANIC BASALT
seetion through aeeretionary wedge, displaying prineipal features observed in Shimanto belt. e Idealized
stratigraphie seetion of melange zone. On top of oeeanie erust, sulfide and/or manganiferous hematite
deposits may oeeur. (After Taira et al. 1988)