Site Summaries: Site PRU-4A | Table of Contents

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.

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.

Site Summaries: Site PRU-4A | Table of Contents