Proposed Site ENT-03A will drill through the PTZ to sample a zone of incipient deformation and fluid flow. This site would penetrate into the subducting sediment section all the way to basement. A high priority is to sample pore fluids in great detail across the extensions of the 560 mbsf, 820 mbsf, décollement, and 1100 mbsf boundaries.
Proposed Site ENT-06A will drill through the LTSZ and OOST to sample and investigate the nature of lithology, defomation, physical properties gradient, and fluid flow path within the older part of the accretionary prism. The penetration would be 800 mbsf. Fluid sampling across the OOST is a high priority at this site.
Proposed Site ENT-07A will penetrate the slope sediments which cover the LTSZ. Investigation of the age and lithological characteristics would provide information on the history of accretion and deformation of the prism. The drilling plan is to conduct APC/XCB to refusal.
Proposed Site WNT-01A is a seaward reference site in the western transect.
Proposed Site ENT-02A is an alternate to ENT-01A, the reference site.
Proposed Site ENT-04 would drill through the first OOST zone to sample deformed accreted sediments and across the seaward edge of the OOST. This site would provide information on the gradient of deformation and chemistry of fluid intermediate between the less deformed section (Sites ENT-01A and ENT-03A) and highly deformed and lithified section (Site ENT-06A).
Proposed Site ENT-05A is located to penetrate slope basin sediments and the seaward-most OOST.
Proposed Site ENT-08A is an upper-slope site that would sample slope sediments, an older portion of the accretionary prism in the LDRZ, and gas hydrates.
Proposed Site ENT-09A is an upper-slope site that would sample slope sediments, an older portion of the accretionary prism in the LDRZ, and gas hydrates.
Proposed Site WNT-02A is a site that would penetrate the frontal thrust in the western transect.
Proposed Site WNT-03B is located in the proto-thrust zone to explore conditions of initial deformation (ductile strain and seismic discontinuities) and the nature of the décollement in comparison with the eastern transect.
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