Technical Note 20/5


LEG 179



TABLE 1

PROPOSED SITE INFORMATION AND DRILLING STRATEGY


SITE: ODP Site 756
PRIORITY:
POSITION: 27°21.00´S, 87°35.00´W
WATER DEPTH: 1520 m
SEDIMENT THICKNESS: 139 m
TOTAL PENETRATION: 339 m
SEISMIC COVERAGE:

Objectives: Drill a borehole into basement on the Ninetyeast Ridge in the Indian Ocean to provide a site for the installation of a broadband ocean seismometer and instrument package for ION program.

Drilling Program: Jet-in first casing string. Drill hole and case to basement. RCB core in basement.

Logging and Downhole Operations: Triple combo with ARI, FMS-sonic, UBI.

Nature of Rock Anticipated: Basalt



SITE
: ODP Site 757
PRIORITY:
POSITION: 17°01´S, 88°11´E
WATER DEPTH: m
SEDIMENT THICKNESS: 370 m
TOTAL PENETRATION: 470 m
SEISMIC COVERAGE:

Objectives: Alternate site with the same objectives as Site 756.

Drilling Program: Jet-in first casing string. Drill hole and case to basement. RCB core in basement.

Logging and Downhole Operations: Triple combo with ARI, FMS-sonic, UBI.

Nature of Rock Anticipated: Basalt


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