Priority:
|
Alternate site
|
Position:
|
32°50.982’N, 157°52.920’E
|
Water depth
(m):
|
3499
|
Target drilling
depth (mbsf):
|
310 (210 m sediment, 100 m basement)
|
Requested
maximum
penetration
(mbsf):
|
~510 (300 m basement)
|
Survey
coverage:
|
Cruise TN037, R/V Thomas Thompson
• Seismic Line 15 (time: 2246Z, 25 Aug 1994) (Fig. AF20)
• Seismic Line 16 (time: 1114Z, 27 Aug 1994) (Fig. AF21)
• Track map (Fig. AF13, AF22)
|
Objective:
(see text
for details)
|
• Core igneous basement near the summit of the 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 or bit failure
• Wireline log (triple combo, FMS-Sonic)
|
Anticipated
lithology:
|
• 0–210 mbsf: cherty chalks and limestone
• >210 mbsf: basalt
|
