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Priority:
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Secondary
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Position:
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47°37.449′N, 127°20.049′W; approved for 500 m radius surrounding position
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Water depth (m):
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2600
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Target drilling depth (mbsf):
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940
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Approved maximum penetration (mbsf):
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940
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Survey coverage:
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EW0702 Line 1, CDP 1720 (Track Map and Seismic Profile Fig. F8) |
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Objective:
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Drill into deeply buried basement ridge 145 km from the spreading center, where basement temperatures may approach 140°C, to evaluate the influences of hydrothermal circulation on crustal evolution and microbiology. Sediment thickness is 890 m, and basement penetration will be 20–50 m.
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Drilling and Logging program:
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• RCB core through 910 m of sediment and into uppermost basement
• If time allows, install cone and casing through sediment
• Collect temperature measurements (SET)
See "Operations plan/drilling strategy" and Table T3 |
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Nature of rock anticipated:
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Turbidites (sand, silt, clay) and hemipelagic mud, overlying basalt
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