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Priority:
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Alternate
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Position:
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17°51.75′N, 147°18.09′E
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Water depth (m):
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4130
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Target drilling depth (mbsf):
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1500 (500 m sediment, 1000 m basement)
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Approved maximum penetration (mbsf):
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1500 (pending EPSP approval to deepen)
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Survey coverage:
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MGL1204 Line N CDP 17806
• Track map (Fig. AF1B)
• Seismic profile (Fig. AF10), Mrozowski et al. (1982), and Chapp et al. (2008) |
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Objective:
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Characterize transitional basalt lavas and associated intrusive rocks to investigate subduction initiation processes and test supra-subduction zone ophiolite models
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Drilling, coring, and downhole measurements program:
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• Hole A: jet-in test
• Hole B: reentry system (16 and 10-3/4 inch casing to 500 mbsf)
• Hole B: drill without recovery to 650 mbsf, RCB from 650 to 1500 mbsf
• Wireline logging (triple combo, FMS-sonic)
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Nature of rock anticipated:
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Pelagic carbonate with thin ash layers, turbidites, boninite, basaltic lavas, and diabase
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