Priority:
|
Alternate site
|
Position:
|
37°49.266’N, 162°59.220’E
|
Water depth
(m):
|
3339
|
Target drilling
depth (mbsf):
|
385 (285 m sediment, 100 m basement)
|
Requested
maximum
penetration
(mbsf):
|
~585 (300 m basement)
|
Survey
coverage:
|
Cruise TN037, R/V Thomas Thompson
• Seismic Line 5C (time: 0030Z, 11 Aug 1994) (Fig. AF7)
• Seismic Line 6 (time: 2320Z 11 Aug 1994) (Fig. AF8)
• Track map (Figs. AF9, AF10)
|
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:
|
• 0–83 mbsf: pelagic ooze
• 83–196 mbsf: chalk with chert
• 196–285 mbsf: shaley chalk
• >285 mbsf: basalt
|
