Priority:
|
Alternate site
|
Position:
|
36°00.516’N, 158°20.970’E
|
Water depth
(m):
|
3243
|
Target drilling
depth (mbsf):
|
333 (133 m sediment, 200 m basement)
|
Requested
maximum
penetration
(mbsf):
|
~433 (300 m basement)
|
Survey
coverage:
|
Cruise TN037, R/V Thomas Thompson (Klaus and Sager, 2002)
• Seismic Line 11 (time: 1741Z, 19 Aug 1994) (Fig. AF1)
• Seismic Line 9 (time: 0801Z, 16 Aug 1994). (Fig. AF2)
• Track map (Fig. AF3, AF4)
|
Objective:
(see text
for details)
|
• Core igneous basement from Central High summit 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, coring to TD (possible need for second bit and FFF deployment?)
• Wireline log (triple combo, FMS-Sonic)
|
Anticipated
lithology:
|
• 0–25 mbsf: pelagic ooze
• 25–88 mbsf: chalk with chert
• 88–133 mbsf: shaley chalk
• >133 mbsf: basalt
|
