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Priority:
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Primary: Chikyu Expedition 326 (NanTroSEIZE Stage 3: plate boundary deep riser: top hole engineering)
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Position:
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33°18.0507′N, 136°38.2029′E
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Water depth (m):
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2060
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Target drilling depth (mbsf):
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800
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Approved maximum penetration (mbsf):
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7000
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Survey coverage:
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CDEX 2006 3-D MCS; extensive survey data outlined in Proposal 603C-Full:
• 3-D In-line 2529
• 3-D Cross-line 6225 |
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Objective (see text for full details):
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• Case riser hole to 3300 mbsf in preparation for future extension to 7000 mbsf, for future permanent observatory installation
• Determine nature of the plate boundary below the drill site
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Drilling, coring, and downhole measurement program:
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• Set 36 inch casing to 60 mbsf
• Set 20 inch casing to 800 mbsf
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Anticipated lithology:
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0–150 mbsf: Kumano forearc basin sediments
150–910 mbsf: lower sediments
910–1400 mbsf: accretionary prism |
