Priority:
|
Alternate for proposed Site NT1-07A
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Position:
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32°54.000′N, 136°51.110′E
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Water depth (m):
|
4355
|
Target drilling depth (mbsf):
|
1400 (1300 m sediment)
|
Approved maximum penetration (mbsf):
|
1500; approved by CDEX and TAMU safety panels based on EPSP Jan 2007
recommendation
|
Survey coverage:
|
IFREE 3-D 2006 seismic survey; extensive survey data outlined in Proposal
603A-Full2 (www.iodp.org/nantroseize-downloads):
• Track map (Fig. AF4)
• IFREE 3-D Inline 95 (Figs. AF5, AF17)
• IFREE 3-D Crossline 1151 (Fig. AF18)
• 2-D KR Line 0211 (Fig. AF19)
|
Objective
(see text for full details):
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Reference site:
• Penetrate entire sedimentary section and into oceanic
crust
• Complete characterization of Shikoku Basin strata and upper
igneous basement where basement topography is relatively flat
• Document lithologic, hydrologic, thermal, geotechnical, and
geochemical properties of subduction inputs
• Log-seismic integration
|
Drilling, coring, and downhole measurement program:
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See NT1-07A
|
Anticipated lithology:
|
0–400 mbsf: upper Shikoku Basin hemipelagics and volcanic
ash
400–800 mbsf: lower Shikoku Basin hemipelagics and volcanic
ash
800–1200 mbsf: lower Shikoku Basin hemipelagics and turbidite
sands
>1200 mbsf: volcaniclastic sediments and basalt
|
