LIST OF FIGURES


Figure pa

1-1 Diagram of accretionary prism and the processes of frontal accretion and
 u n d e rp latin g ..............................................................................................................3

1-2 Schematic of an ideal coulomb wedge. ............................... ............................... 5

2-1 Map of large-scale regional setting location of the drill sites at the Barbados
 accretionary com plex .................................................................... ...................18

2-2 Map showing location of ODP drilling along the Costa Rica subduction zone. ....20

2-3 Location map of ODP Leg 190 and previous ODP/DSDP drill sites in the
 N ankai T rough .................................................... ................. 2 1

2-4 Map showing general locations of drill sites occupied during ODP Legs 138
 and 112 at Peru subduction zone. ................................ ................................. 23

2-5 Plot of laboratory derived permeability measurements from Barbados, Costa
 Rica, Nankai, and Peru subduction zones. .................................... .................29

2-6 Permeabilities classified based on depositional environment and location. ...........33

2-7 Permeabilities classified based on grain size distribution. ...................................37

2-8 Permeabilities classified based on structural domain. ........................................39

3-1 Location map of the study area in the Nankai accretionary complex and sites
 used for this study. ........................................... ... .... ........ ......... 46

3-2 Schematic interpretation of the Muroto Transect showing tectonic domains and
 location of Leg 190 drill sites used in this study...................................................47

3-3 Porosity profiles of Sites 808, 1174, and 1173. ...............................................50

3-4 Permeability data measured for samples from ODP Leg 190................................54

3-5 Simulated porosity and k* profiles for base run at Site 1173 ................................65

3-6 Simulated porosity and k* profiles with varying bulk permeability at Sites 1174
 and 808. ..................................................................................66