Site: SWPAC-8A
Track line SWPAC-8A
Seismic line SWPAC-8A

Priority: 1
Position: 4634.78'S, 17723.63'W
Water Depth: 4425 m
Sediment Thickness: 1160 m
Target Drilling Depth: 710 m
Approved Maximum Penetration: 800 m
Seismic Coverage: NZOI Lines CR2023, CR2040, and CR1151; NIWAR 3034 Lines 11 and 12

Objectives: The objectives of SWPAC-8A are to:

  1. Determine climate, sea level, and tectonic controls on abyssal sediment supply.
  2. Test the deep-sea cyclotherm model.
  3. Evaluate late Miocene to Holocene sediment injection into DWBC.
  4. This site in combination with the most southerly drift sites (Sites SWPAC-6B, 7B) will allow us to assess the shift in position of the climatically important AAC and SAF fronts using faunal and coarse-fraction analysis and stable isotopic and magnetic susceptibility measurements to trace ice-rafted detritus.

Drilling Program: Double APC, XCB

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

Nature of Rock Anticipated: Terrigenous silt/mud turbidites, hemipelagites

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