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Priority: |
1 |
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Position: |
30.17°N, 42.12°W |
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Water depth (m): |
1630 |
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Sediment thickness (m): |
1–2 |
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Target drilling depth (mbsf): |
>700 into high seismic velocity zone |
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Approved maximum penetration (mbsf): |
700 |
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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) |
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Objectives: |
Core through serpentinized peridotite and gabbro into fresh peridotite. |
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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" |
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Logging program: |
Five logging runs: • Triple combination tool string • Formation MicroScanner/Dipole Sonic Imager tool string • Ultrasonic Borehole Imager • Borehole magnetometer • Vertical seismic profile |
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Nature of rock anticipated: |
Serpentinized peridotite, gabbro, fresh peridotite |