IODP

doi:10.2204/iodp.sp.316.2007

Site summaries (continued)

Proposed Site NT3-01B

Priority:
Primary:
  • Chikyu Expedition 314 (LWD)
Alternate for all other Stage 1 expeditions
Position:
33°18.020′N, 136°38.180′E
Water depth (m):
1966
Target drilling depth (mbsf):
1400
Approved maximum penetration (mbsf):
1400; approved by CDEX and TAMU safety panels based on EPSP Jan 2007 recommendation
Survey coverage:
CDEX 2006 3-D MCS; extensive survey data outlined in Proposal 603C-Full (www.iodp.org/nantroseize-downloads)
Objective
(see text for full details):
Determine splay fault history and nature of prism below basin sediments
Preparatory site for deep (~5.5–6.0 km) riser drilling
Drilling, coring, and downhole measurement program:
Chikyu Expedition 314 (LWD):
  • Hole A - MWD/LWD
  • 9-5/8 inch casing to 1000 mbsf as required
Anticipated lithology:
0–1039 mbsf: slope basin sediments; rapidly deposited sand/silts/clays
~420 mbsf: bottom-simulating reflector
1039–1400 mbsf: older accreted prism