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doi:10.2204/iodp.sp.303306.2004

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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