Site: FR-1A
Priority:
Secondary
Position:
47°54.105'N, 128°33.468'W;
approved for 500 m radius surrounding position
Water depth (m):
2600
Target drilling depth (mbsf):
110
Approved maximum penetration (mbsf):
110
Survey coverage:
• InLine 44
• TR426
• GeoB 00-365
(track map–Fig F6; seismic profile–Fig. F7)
Objective:
Drill a short series of sediment and shallow basement holes along the first buried basement ridge east of the spreading center to
• Evaluate sediment properties
• Document fluid chemistry and evidence for along-strike fluid flow
• Determine the nature of hydrothermal alteration and microbiology in uppermost basement
Sediment thickness = 40–60 m where basement comes closest to the seafloor
Drilling and logging program:
• APC/XCB and RCB core through sediments and into uppermost basement
• Core into upper basement
• Temperature measurements (APCT, DVTP)
• Potential water sampling (WSTP)
Nature of rock anticipated:
Turbidites (sand, silt, clay) and hemipelagic mud, overlying basal