SITE SUMMARY GAB-07A

Site: GAB-07A
(GAB-07A seismic)
(GAB-07A track line)

Priority: 1
Position: 3321.4498S, 12828.8772E
Water Depth: 480 m
Sediment Thickness: ‰2645 m
Approved Maximum Penetration: 580 m
Seismic Coverage: Intersection at SPs 600 and 10569.5 on AGSO Line 169/05

Objectives: The objectives of GAB-07A are to

  1. Collect detailed, high-resolution profiles through a late Neogene succession deposited within a low-energy, cool-water carbonate environment to determine the response of such a depositional system to Plio-Pleistocene sea-level fluctuations.
  2. Obtain a high-resolution record of late Neogene paleoceanographic variation within a middle-upper slope setting, as a component of the shelf-to-basin paleoceanographic transect.
  3. Evaluate the diagenetic history of calcitic sediments deposited within a low-energy environment below storm wave base, for comparison with the higher energy environments at Sites GAB-08A and GAB-09A.

Drilling Program: Double APC, XCB

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

Nature of Rock Anticipated: Foram-nanno ooze and chalk; minor wackestone

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