IODP

doi:10.2204/iodp.sp.317.2009

Site summaries

Proposed Site CB-01A
Priority:
Primary
Position:
44°46.1085´S, 171°40.4393´E
Water depth (m):
85
Target drilling depth (mbsf):
780
Approved maximum penetration (mbsf):
780
Survey coverage:
EW00-01-66 (CDP 7250), EW00-01-01 (CDP 2456)
• Track map (Fig. AF1)
• Seismic profile (Fig. AF2)
• Location map (Fig. F3)
• MCS profile EW00-01-66 (Fig. F7)
Objective (see text for details):
Sample facies landward of clinoform breakpoints of progradational sequence boundaries, particularly Unconformities U4–U9 (middle Miocene to Pliocene)
Drilling, coring, and downhole measurement program:
Hole A
• APC/XCB to refusal (APC core orientation)
Hole B
• Drill without coring to APC refusal depth
• RCB coring to 780 mbsf
• Wireline log (triple combo, FMS-sonic)
• VSP with VSI
Alternative: Hole A
• RCB to 780 mbsf
• Wireline log (triple combo, FMS-sonic)
• VSP with VSI
Anticipated lithology:
0–780 mbsf: Terrigenous siltstone and silty mudstone with intervals of fine-grained sand and mud