IODP

doi:10.2204/iodp.sp.338.2012

Site summaries

Hole C0002F

Priority: Primary: Chikyu Expedition 338 (riser)
Position: 33°18.507’N, 136°38.2029’E
Water depth (m): 1968
Target drilling depth (mbsf): 3600
Approved maximum penetration (mbsf): 7000
Survey coverage: Extensive data from 3-D seismic data:
• In-line 2553
• Cross-line 6228
Objective: • Drill and case hole
• Take cuttings and core samples to define lithostratigraphy, physical properties, and composition
• Constrain in situ stress and pore pressure
Drilling, coring, and downhole measurement program: Chikyu Expedition 338:
• RCB coring (2300–2400 mbsf)
• LWD/MWD
• Cuttings analysis
Anticipated lithology: Hemipelagic mud, mudstone, and siltstone/sandstone

Site C0007

Priority: Expedition 338 contingency
Position: 33°01.2326’N, 136°47.9485’E
Water depth (m): 4081.0
Approved penetration depth (mbsf): 1400
Objective: • Collect logging data to complement core samples collected during Expedition 316
Drilling program: • Logging with LWD
Anticipated lithology: • 0–440 mbsf: alternating mud and sand layers (accreted trench strata)
• 440–1400 mbsf: interbedded mud and sand layers (trench wedge)

Site C0012

Priority: Expedition 338 contingency
Position: 32°44.888’N , 136°55.024’E
Water depth (m): 3510.7
Total depth (DRF, m): 4115.0
Approved penetration depth (mbsf): 800
Objective: • Collect logging data to complement core samples collected during Expedition 322
Drilling program: • Logging with LWD
Anticipated lithology: • 0–600 mbsf: Shikoku Basin hemipelagic sediments
• >600 mbsf: volcaniclastic sediments and basalt