Priority: 1
Position: 40°40.94'N, 11°35.60'W
Water Depth: 5040 m
Sediment Thickness: 1100 m (750 + 350 synrift)
Total Penetration: 1150 m
Seismic Coverage: Lusigal Line 12, SP4020, RRS Discovery Line CAM 136, CDP12890
Objectives:
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 tectono-metamorphic 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 400 m into basement to pass through the H reflector (detachment fault). Log the hole.
Logging and Downhole Operations: Triple combo and FMS.
Nature of Rock Anticipated: Nannofossil clay claystone, siltstone and fine sandstone, ooze, and chalk; continental crust or gabbro.
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