173 Scientific Prospectus


Position: 40°40.94'N, 11°35.08'W
Water Depth: 5040 m
Sediment Thickness: 1550 m (950 + 600 synrift)
Total Penetration: 1600 m
Seismic Coverage: Lusigal Line 12, SP4035; Discovery Line CAM 136, CDP12890

1) Drill through the detachment fault to determine the role of detachment tectonics in the evolution of the margin.
2) Determine the kinematics of deformation and tectonometamorphic evolution of the deep lithospheric loads during a rifting episode.
3) Characterize the tectonic and metamorphic processes that dominate the transition from continental to oceanic crust.
4) Determine its petrogenetic origin.

Drilling Program: Drill pilot hole ca. 20 m into basement. Log the hole. Jet-in test, set re-entry cone and casing. Drill 600 m into basement to pass through the H reflector. Log the hole.

Logging and Downhole Operations: Triple combo, FMS.

Nature of Rock Anticipated: Nannofossil clay, clay, claystone, siltstone and fine sandstone, ooze, and chalk; continental crust or gabbro.

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