Site Summaries
Site: PRU-1A
Priority: Primary
Position: 10°58.60'S, 77°57.46'W
Water Depth: 150 m
Sediment Thickness: >2000 m
Target Drilling Depth: 300 m
Approved Maximum Penetration: 200 m (to 300 m requested to PPSP)
Seismic Coverage: Yaloc 20-03-74, additional single-channel and 3.5-kHz data were also
collected during ODP Leg 112, same position as ODP Site 681.
See seismic line.
Objectives:
1) Test how introduction of an electron acceptor by subsurface hydrologic flow affects community
structure and sediment chemistry in organic-rich (methanogenic) sediments.
2) Identify the methanotrophic communities of deeply buried marine sediments.
Drilling Program: APC to refusal, XCB to TD. At least two holes, possibly three. Possible MDCB/RCB coring to improve recovery. Possible PCS deployment. May require additional mudline cores.
Logging and Downhole Program: Triple combo, possible FMS, APC-temperature, DVTP, and APC methane tool.
Nature of Rock Anticipated: Foraminifer diatomaceous mud and ooze, sand.
