Priority:
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Alternate for CB-04B
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Position:
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44°57.8052´S, 172°03.6799´E
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Water depth (m):
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713
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Target drilling depth (mbsf):
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1500
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Approved maximum penetration (mbsf):
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Pending approval
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Survey coverage:
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EW00-01-60 (CDP 1338), no crossing line
• Track map (Fig AF1)
• Seismic profile (Fig AF11)
• Location map (Fig. F3)
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Objective (see text for details):
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Sample slope facies of progradational sequence boundaries, particularly Unconformities U6–U9, U11, and U13–16 (Late Miocene to early Pliocene)
Sample Marshall Paraconformity (Oligocene) and top of Amuri Limestone (late Eocene)
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Drilling, coring, and downhole measurement program:
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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 depths
• RCB coring to 1500 mbsf
• wireline log (triple combo, FMS-sonic)
• VSP with VSI
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Anticipated lithology:
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0–1282 mbsf: Terrigenous siltstone and silty mudstone with intervals of fine-grained sand and mud
1282 mbsf (or slightly shallower)–1500 mbsf: Limestone
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