Priority:
|
Alternate site
|
Position:
|
37°’59.333’N, 162°39.275’E
|
Water depth
(m):
|
3586
|
Target drilling
depth (mbsf):
|
428 (328 m sediment, 100 m basement)
|
Requested
maximum
penetration
(mbsf):
|
~628 (300 m basement)
|
Survey
coverage:
|
Cruise TN037, R/V Thomas Thompson
• Seismic Line 5A (time: 2144, 09 Aug 1994) (Fig. AF11)
• Track map (Fig. AF9)
|
Objective:
(see text
for details)
|
• Core igneous basement from Northern High for petrographic, geochemical, isotopic, radiometric dating, and paleolatitude investigation.
• Determine the origin and emplacement history of late 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:
|
• 0–41 mbsf: pelagic ooze
• 41–104 mbsf: chalk and chert
• 104–328 mbsf: shaley chalk, limestone, and chert
• >328 mbsf: basalt
|
