Priority:
|
1
|
Position:
|
30.17°N, 42.12°W
|
Water depth (m):
|
1630
|
Sediment thickness (m):
|
12
|
Target drilling depth (mbsf):
|
>700 into high seismic velocity zone
|
Approved maximum penetration (mbsf):
|
700
|
Survey coverage:
|
Multichannel seismic data collected by the Ewing (EW-0102) in 2001 using a 10-gun array with 3100 in3 (51 L) capacity.
Shot spacing = 37.5 m.
The 6 km streamer had 480 channels, and data were sampled every 4 ms.
(See Fig. F4)
|
Objectives:
|
Core through serpentinized peridotite and gabbro into fresh peridotite.
|
Drilling program:
|
Core pilot hole to
Log
Install hard rock reentry system to hole
Drill case to
Core as deep as possible into fresh peridotite
See "Primary Site: Proposed Site AMFW-01A"
|
Logging program:
|
Five logging runs:
Triple combination tool string
Formation MicroScanner/Dipole Sonic Imager tool string
Ultrasonic Borehole Imager
Borehole magnetometer
Vertical seismic profile
|
Nature of rock anticipated:
|
Serpentinized peridotite, gabbro, fresh peridotite
|