SITE SUMMARY GAB-13B

Site: GAB-13B
(GAB-13B seismic)
(GAB-13B track line)

Priority: 2
Position: 3445.4940S, 12735.4358E
Water Depth: 4465 m
Sediment Thickness: >3.5 km
Approved Maximum Penetration: 800 m
Seismic Coverage: Intersection of AGSO Lines 169/08 (SP 3987.5) and 169/09 (SP 3457.5)

Objectives: The objectives of GAB-13B are to

  1. Recover pelagic ooze from the middle continental rise to construct a Cenozoic and Late Cretaceous paleoceanographic record of the opening of the Southern Ocean and development of the Circum-Antarctic Current.
  2. Determine the history of Cenozoic and Late Cretaceous CCD fluctuations and deep-water mass variations during the evolution of the Southern Ocean (in conjunction with Sites GAB-01C and GAB-02B).
  3. Determine depositional and diagenetic facies on the middle continental rise.

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 (610 m), calcareous mudstone (375 m)

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