170 Prospectus

Site CR-5 (alternate to CR-1 or CR-2)

Priority: 2
Position: 9°42'N, 86°8.4'W
Water depth: 3580 m
Sediment thickness: 1150 m
Total penetration: 1150 mbsf (approved to a depth of 1150 mbsf)
Seismic coverage: 3D Line 172

Objectives: The objectives of CR-5 are to:

1. Determine the age and physical properties of the sedimentary apron.

2. Penetrate beneath the high-amplitude reflector and determine the nature of the material beneath this layer.

3. Penetrate to the zone of out-of-sequence thrusting and determine the nature of material above and below this layer.

4. Use the results of the drilling to compute a mass balance between incoming and accreted strata.

Drilling program:
Hole A: APC/XCB with Adara tool to 500 mbsf plus WSTP measurements
Hole B: Drill to 500 mbsf, RCB to 1150 mbsf
Hole C: Drill with LWD tools to 1150 mbsf

Logging and downhole: Logging while drilling

Nature of rock anticipated: Hemipelagic mudstone and carbonate-rich pelagic mudstone. Possible serpentine slivers beneath high-amplitude reflector.

To Seismic Profile CR-5

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