Priority:
|
Alternate site
|
Position:
|
32°18.570’N, 158°59.880’E
|
Water depth
(m):
|
2987
|
Target drilling
depth (mbsf):
|
611 (311 m sediment, 300 m basement)
|
Requested
maximum
penetration
(mbsf):
|
~611 (300 m basement)
|
Survey
coverage:
|
Cruise TN037, R/V Thomas Thompson
• Seismic Line 14B (time: 1207Z, 23 Aug 1994) (Fig. AF16)
• Seismic Line 14D (time: 2107Z, 24 Aug 1994) (Fig. AF17)
• Track map (Figs. AF13, AF18)
|
Objective:
(see text
for details)
|
• Deep core igneous basement from summit area of Southern High for petrographic, geochemical, isotopic, radiometric dating, and paleolatitude investigation.
• Determine the origin and emplacement history of Shatsky Rise basement rocks.
|
Drilling,
coring, and
downhole
measurement
program:
|
Hole A
• RCB wash to ~50 m above basement, core to TD (two bits needed and FFF deployment)
• Wireline log (triple combo, FMS-Sonic, and UBI)
|
Anticipated
lithology:
|
• 0–50 mbsf: pelagic ooze
• 50–200 mbsf: chalk with chert
• 200–311 mbsf: shaley chalk and limestone
• >311 mbsf: basalt
|
