Priority:
|
Alternate site
|
Position:
|
30°54.357’N, 156°32.473’E
|
Water depth
(m):
|
4783
|
Target drilling
depth (mbsf):
|
611 (511 m sediment, 100 m basement)
|
Requested
maximum
penetration
(mbsf):
|
~811 (300 m basement)
|
Survey
coverage:
|
Cruise TN037, R/V Thomas Thompson
• Seismic Line 17C (time: 2301Z, 28 Aug 1994) (Fig. AF15)
• Track map (Figs. AF13, AF14)
|
Objective:
(see text
for details)
|
• Core possible late stage sills and igneous basement rocks from the deep flank of Southern High for petrographic, geochemical, isotopic, radiometric dating, and paleolatitude investigation.
• Determine the origin and emplacement history of early Shatsky Rise basement rocks.
|
Drilling,
coring, and
downhole
measurement
program:
|
Hole A
• RCB wash to ~50 m above sediment reflectors (sill or postshield lava flow?), core to TD or bit failure
• Wireline log (triple combo, FMS-Sonic)
|
Anticipated
lithology:
|
• 0–74 mbsf: pelagic ooze
• 74–511 mbsf: chert/chalk/limestone and possible sill?
• >511 mbsf: basalt
|
