Priority:
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Primary:
- Chikyu Expedition 314 (LWD)
Alternate for all other Stage 1 expeditions
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Position:
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33°18.020′N, 136°38.180′E
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Water depth (m):
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1966
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Target drilling depth (mbsf):
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1400
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Approved maximum penetration (mbsf):
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1400; approved by CDEX and TAMU safety panels based on EPSP Jan 2007 recommendation
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Survey coverage:
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CDEX 2006 3-D MCS; extensive survey data outlined in Proposal 603C-Full (www.iodp.org/nantroseize-downloads)
- Track map (Fig. AF30)
- 3-D InLine 2529 (Figs. AF34, AF35)
- 3-D CrossLine 6225 (Fig. AF36)
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Objective
(see text for full details):
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Determine splay fault history and nature of prism below basin sediments
Preparatory site for deep (~5.5–6.0 km) riser drilling
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Drilling, coring, and downhole measurement program:
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Chikyu Expedition 314 (LWD):
- Hole A - MWD/LWD
- 9-5/8 inch casing to 1000 mbsf as required
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Anticipated lithology:
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0–1039 mbsf: slope basin sediments; rapidly deposited sand/silts/clays
~420 mbsf: bottom-simulating reflector
1039–1400 mbsf: older accreted prism
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