Priority:
|
Primary site
|
Position:
|
38°04.400’N, 162°38.710’E
|
Water depth
(m):
|
3654
|
Target drilling
depth (mbsf):
|
294 (194 m sediment, 100 m basement)
|
Requested
maximum
penetration
(mbsf):
|
~494 (300 m basement)
|
Survey
coverage:
|
Cruise TN037, R/V Thomas Thompson
• Seismic Line 5A (time: 2130, 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:
|
• 0–54 mbsf: pelagic ooze
• 54–194 mbsf: chalk and chert
• >194 mbsf: basalt
|
