Priority:
|
Primary:
• Chikyu Expedition 314 (LWD)
Alternate:
• Other Stage 1 expeditions
|
Position:
|
32°49.7300′N, 136°52.8900′E
|
Water depth (m):
|
4062
|
Target drilling depth (mbsf):
|
1200 m sediment (stop at basement contact)
|
Approved maximum penetration (mbsf):
|
1400; approved by CDEX and TAMU safety panels based on EPSP Jan 2007
recommendation
|
Survey coverage:
|
Extensive survey data outlined in Proposal 603A-Full2 (www.iodp.org/nantroseize-downloads):
• Track maps (Figs. AF20, AF4)
• Line odkm 03-101 SP 2524 (Fig. AF21)
• IFREE 3-D InLine 95 (Figs. AF5, AF22)
|
Objective
(see text for full details):
|
Reference site:
• Penetrate entire sedimentary section
• Complete characterization of Shikoku Basin strata and upper
igneous basement where basement topography is relatively flat and the lower Shikoku Basin sand facies is well-developed
• Document lithologic, hydrologic, thermal, geotechnical, and
geochemical properties of subduction inputs
• Log-seismic integration
|
Drilling, coring, and downhole measurement program:
|
Chikyu Expedition 314 (LWD):
Hole A - MWD/LWD to basement contact
|
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
|
