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Priority:
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Primary
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Position:
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16º37.2858′N, 68º50.3376′E
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Water depth (m):
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3630
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Target drilling depth (mbsf):
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1570
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Approved maximum penetration:
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Basement + 200 m
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Survey coverage (track map; seismic profile):
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Bathymetric sketch and site track map (Fig. AF5)
Deep-penetration seismic reflection:
• Primary line: W-06 (SP 11741) (Fig. AF6)
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Objectives:
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• Reconstruct changes in weathering and erosion rates over tectonic timescales
• Ascertain the nature of basement rocks in the Laxmi Basin
• Constrain velocity variations with depth within sedimentary and basement layers |
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Drilling program:
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Hole A:
• APC to refusal with nonmagnetic core barrels, core orientation (FlexIT tool), and APCT-3
• Hole B:
Jet-in test
Hole C:
• APC to refusal with nonmagnetic core barrels
• XCB to 600 mbsf
Hole D:
• Reentry system (20, 16, and 10¾ inch casing to ~600 mbsf)
• RCB core with nonmagnetic core barrels to 1570 mbsf (includes 100 m of basement) |
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Downhole logging program:
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Hole C:
• Triple combo
• FMS-sonic
Hole D:
• Triple combo
• FMS-sonic
VSI |
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Nature of rock anticipated:
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Siltstone, sandstone, shale, basalt |
