SITE SUMMARY GAB-02B

Site: GAB-02B
(GAB-02B seismic)
(GAB-02B track line)

Priority: 1
Position: 3332.3730S, 12854.3002E
Water Depth: 1043 m
Sediment Thickness: ‰4600 m
Approved Maximum Penetration: 1750 m
Seismic Coverage: Intersection at SPs 428 and 3550 on AGSO Line 169/07

Objectives: The objectives of GAB-02B are to

  1. Recover pelagic ooze from the middle-upper slope to construct a Cenozoic and Late Cretaceous paleoceanographic record of the opening of the Southern Ocean and the development of the Circum-Antarctic Current.
  2. Determine the history of Cenozoic and Late Cretaceous CCD fluctuations and intermediate water mass variations during the evolution of the Southern Ocean (in conjunction with Sites GAB-01C and GAB-13B).
  3. Determine depositional and diagenetic facies on the middle-upper slope.

Drilling Program: Triple APC, XCB, RCB

Logging and Downhole Operations: Triple combo, FMS/Sonic, GHMT, WST

Nature of Rock Anticipated: Nanno-foram ooze and chalk with minor wackestone (1400 m); indurated sandy calcareous mudstone (310 m)

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