SITE SUMMARIES (continued)Site: PCM-3A
Priority: 3 (or 2 if PCM-2A yields volcanic architecture)
Position: 3°43.230'S, 151°40.521'E
Water Depth: 1696 m
Sediment Thickness: 0 m
Target Drilling Depth: up to 650 m
Approved Maximum Penetration: 300 mbsf
Seismic Coverage: Sonne SO-94/SCS Leg 2, 150 m abeam CDP 1705
Objectives: The objectives of PCM-3A are to determine the
1.Subsurface alteration and mineralization patterns, and their variation with depth, adjacent to an area of focused, high-temperature venting; and
2. Hydrothermal fluid pathways.
Drilling Program: Bare-rock spud; reentry may be required to meet depth objectives. Alternate drilling strategy may be employed based on the results of operations at Site PCM-2A. Options include bare-hole reentry, free-fall funnel deployment and/or a reentry cone.
Logging and Downhole: Fluid and temperature sampling as required. Triple combo, FMS/sonic, logging while drilling.
Nature Of Rock Anticipated: Fresh and altered dacite lava, mineralized veins, possible massive sulfide intervals.
Site: PCM-4A | Table of Contents