Site: FR-1B
Priority:
Secondary
Position:
47°54.132'N, 128°33.591'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
TR410
GeoB 00-365
(track mapFig F6; seismic profileFig. 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 = 4060 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 basalt