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Hayward, Bruce William; Sabaa, Ashwaq T; Grenfell, Hugh R (2004): Late Quaternary benthic foraminiferal record of the Bounty Trough, east of New Zealand [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.705193, Supplement to: Hayward, BW et al. (2004): Benthic foraminifera and the Late Quaternary (last 150 ka) paleoceanographic and sedimentary history of the Bounty Trough, east of New Zealand. Palaeogeography, Palaeoclimatology, Palaeoecology, 211(1-2), 59-93, https://doi.org/10.1016/j.palaeo.2004.04.007

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Abstract:
The Bounty Trough, east of New Zealand, lies along the southeastern edge of the present-day Subtropical Front (STF), and is a major conduit via the Bounty Channel, for terrigenous sediment supply from the uplifted Southern Alps to the abyssal Bounty Fan. Census data on 65 benthic foraminiferal faunas (>63 µm) from upper bathyal (ODP 1119), lower bathyal (DSDP 594) and abyssal (ODP 1122) sequences, test and refine existing models for the paleoceanographic and sedimentary history of the trough through the last 150 ka (marine isotope stages, MIS 6-1).
Cluster analysis allows recognition of six species groups, whose distribution patterns coincide with bathymetry, the climate cycles and displaced turbidite beds. Detrended canonical correspondence analysis and comparisons with modern faunal patterns suggest that the groups are most strongly influenced by food supply (organic carbon flux), and to a lesser extent by bottom water oxygen and factors relating to sediment type.
Major faunal changes at upper bathyal depths (1119) probably resulted from cycles of counter-intuitive seaward-landward migrations of the Southland Front (SF) (north-south sector of the STF). Benthic foraminiferal changes suggest that lower nutrient, cool Subantarctic Surface Water (SAW) was overhead in warm intervals, and higher nutrient-bearing, warm neritic Subtropical Surface Water (STW) was overhead in cold intervals.
At lower bathyal depths (594), foraminiferal changes indicate increased glacial productivity and lowered bottom oxygen, attributed to increased upwelling and inflow of cold, nutrient-rich, Antarctic Intermediate Water (AAIW) and shallowing of the oxygen-minimum zone (upper Circum Polar Deep Water, CPDW). The observed cyclical benthic foraminiferal changes are not a result of associations migrating up and down the slope, as glacial faunas (dominated by Globocassidulina canalisuturata and Eilohedra levicula at upper and lower bathyal depths, respectively) are markedly different from those currently living in the Bounty Trough.
On the abyssal Bounty Fan (1122), faunal changes correlate most strongly with grain size, and are attributed to varying amounts of mixing of displaced and in-situ faunas. Most of the displaced foraminifera in turbiditic sand beds are sourced from mid-outer shelf depths at the head of the Bounty Channel. Turbidity currents were more prevalent during, but not restricted to, glacial intervals.
Project(s):
Deep Sea Drilling Project (DSDP)
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -45.427545 * Median Longitude: 175.457813 * South-bound Latitude: -46.579660 * West-bound Longitude: 172.393383 * North-bound Latitude: -44.755533 * East-bound Longitude: -177.393700
Date/Time Start: 1983-01-03T00:00:00 * Date/Time End: 1998-09-12T08:00:00
Event(s):
90-594 * Latitude: -45.523500 * Longitude: 174.948000 * Date/Time: 1983-01-03T00:00:00 * Elevation: -1204.0 m * Penetration: 505.1 m * Recovery: 300.7 m * Location: South Pacific/CONT RISE * Campaign: Leg90 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 50 cores; 475.3 m cored; 28.8 m drilled; 63.3 % recovery
181-1119 * Latitude: -44.755533 * Longitude: 172.393383 * Date/Time Start: 1998-08-05T00:00:00 * Date/Time End: 1998-08-26T00:00:00 * Elevation: -396.2 m * Penetration: 656.6 m * Recovery: 612.8 m * Location: South Pacific Ocean * Campaign: Leg181 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 70 cores; 656.6 m cored; 0 m drilled; 93.3% recovery
181-1122C * Latitude: -46.579660 * Longitude: -177.393700 * Date/Time Start: 1998-09-07T06:25:00 * Date/Time End: 1998-09-12T08:00:00 * Elevation: -4431.8 m * Penetration: 627.4 m * Recovery: 351.44 m * Location: South Pacific Ocean * Campaign: Leg181 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 68 cores; 627.4 m cored; 0 m drilled; 56 % recovery
Comment:
Further relevant data set: Hayward et al. (2001) doi:10.1594/PANGAEA.705250, Hayward et al. (2002) doi:10.1594/PANGAEA.690806
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
5 datasets

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Datasets listed in this publication series

  1. Hayward, BW; Sabaa, AT; Grenfell, HR (2004): Relative abundances of late Quaternary benthic foraminifera in ODP Site 90-594. https://doi.org/10.1594/PANGAEA.705139
  2. Hayward, BW; Sabaa, AT; Grenfell, HR (2004): (Appendix 1) Benthic foraminiferal abundance and diversities of DSDP Hole 90-594. https://doi.org/10.1594/PANGAEA.464586
  3. Hayward, BW; Sabaa, AT; Grenfell, HR (2004): Relative abundances of late Quaternary benthic foraminifera in ODP Site 181-1119. https://doi.org/10.1594/PANGAEA.705140
  4. Hayward, BW; Sabaa, AT; Grenfell, HR (2004): (Appendix 1) Benthic foraminiferal abundance and diversities of ODP Site 181-1119. https://doi.org/10.1594/PANGAEA.464587
  5. Hayward, BW; Sabaa, AT; Grenfell, HR (2004): (Appendix 1) Benthic foraminiferal abundance and diversities of ODP Hole 181-1122C. https://doi.org/10.1594/PANGAEA.464588