Site Summaries
Site: ODP Site 853
Priority: Alternate
Position: 7°12.66'N, 109°45.08'W
Water Depth: 3715 m
Sediment Thickness: 70 m
Target Drilling Depth: Through sediment-basement transition
Approved Maximum Penetration: Requested same maximum penetration as for Leg 138.
Seismic Coverage: Thomas Washington station 5, 1238UTC, 05 September 1989.
See seismic line.
Objectives: Equatorial Pacific, low accumulation rate counterpart to the low-activity Peru Basin proposed Sites PRB-1A and PRB-2A. Little or no change in mean sulfate concentration downsection. Similar to Site 852, but with only about 70 m of sediment thickness and even less downhole variation in pore water geochemical composition.
Drilling Program: TBD
Logging and Downhole Program: TBD
Nature of Rock Anticipated: Nannofossil foraminifer ooze and foraminifer clayey nannofossil ooze.
