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SITE SUMMARIES (CONTINUED)

Site: 642
Proposed site:
642
Priority:
Primary
Position:
67°12.7'N, 2°55.8'E
Water depth (m):
1289
Target drilling depth (mbsf):
150
Approved maximum penetration (mbsf):
N/A
Survey coverage:
MCS BGR-1 and NH-1 for Site 642, Leg 104
Objectives:
• Document ability to recover bottom water temperature (BWT) histories from temperature depth profiles in marine sediments.
• Reconstruct BWT histories at Site 642.
• Directly isolate perturbations in subsurface temperature profiles resulting from variations in BWT histories.
Drilling program:
• Drill in reentry cone and casing to ~150 mbsf.
• Set bridge plug.
• Install thermistor string.
Logging program:
None
Nature of rock anticipated:
Muds, sandy mud, minor nannofossil and diatom ooze

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