IODP

doi:10.2204/iodp.sp.317.2009

Site summaries (continued)

Proposed Site CB-05C
Priority:
Global alternate
Position:
44°41.5230´S, 172°33.9178´E
Water depth (m):
402
Target drilling depth (mbsf):
1625
Approved maximum penetration (mbsf):
1625
Survey coverage:
EW00-01-12 (CDP 3190), no crossing line
• Track map (Fig. AF12)
• Seismic profile (Fig. AF14)
• Location map (Fig. F3)
• Dip profile EW00-01-12 (Fig. F8)
Objective (see text for details):
Sample current-deposited sediments on the slope, particularly large sediment Drift D11 (late Miocene to early Pliocene)
Sample Marshall Paraconformity and top of Amuri Limestone (late Eocene to early Oligocene)
Drilling, coring, and downhole measurement program:
Hole A
• APC/XCB to refusal (APC core orientation)
• Wireline log (triple combo, FMS-sonic)
• VSP with VSI
Hole B
• Drill without coring to APC refusal depth
• RCB coring to 1625 mbsf
• Wireline log (triple combo, FMS-sonic)
• VSP with VSI
Anticipated lithology:
0–1593 mbsf: Terrigenous siltstone and silty mudstone with intervals of fine-grained sand and mud
1593 mbsf (or slightly shallower)–1625 mbsf: Limestone