SITE SUMMARIES
Site: PCM-1A
Priority: 2 (or 3 if PCM-2A yields volcanic architecture)
Position: 3°43.293'S, 151°40.583'E
Water Depth: 1720 m
Sediment Thickness: 0 m
Target Drilling Depth: 700 m
Approved Maximum Penetration: 700 mbsf
Seismic Coverage: SO-94/SCS-07 Leg 2, 600 m abeam common depth point (CDP) 1709
(profile shows no substructure)
Objectives: The objectives of PCM-1A are to determine the
1. Volcanic architecture of Pual Ridge;
2. Possible fringes of subsurface alteration system; and
3. Possible evidence for shallow-level seawater input to system.
Drilling Program: To be determined (TBD) after evaluating the results of drilling at Site PCM
2A. Options include bare-hole reentry (BHR), free-fall funnel (FFF) deployment and/or a reentry
cone. Requires multiple reentry to achieve depth target.
Logging and Downhole: Fluid and temperature sampling as required. Triple combo, FMS/sonic,
logging while drilling.
Nature Of Rock Anticipated: Dacite lavas, some dikes and sills, possible andesite at depth,
possible metavolcanic basement. Local altered dacite and mineralized veins.