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Australian Antarctic Southern Ocean Profiling Project

Created 17/11/2025

Updated 17/11/2025

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Metadata record for data from ASAC Project 1119 See the link below for public details on this project. A marked bend in the Hawaiian-Emperor seamount chain supposedly resulted from a recent major reorganization of the plate-mantle system there 50 million years ago. Although alternative mantle-driven and plate-shifting hypotheses have been proposed, no contemporaneous circum-Pacific plate events have been identified. We report reconstructions for Australia and Antarctica that reveal a major plate reorganization between 50 and 53 million years ago. Revised Pacific Ocean sea-floor reconstructions suggest that subduction of the Pacific-Izanagi spreading ridge and subsequent Marianas/Tonga-Kermadec subduction initiation may have been the ultimate causes of these events. Thus, these plate reconstructions solve long-standing continental fit problems and improve constraints on the motion between East and West Antarctica and global plate circuit closure.

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Additional Info

Field Value
Title Australian Antarctic Southern Ocean Profiling Project
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/bd4b39c0-80b6-4be8-9c09-8d4c063189a1
Contact Point
Australian Ocean Data Network
metadata@aad.gov.au
Reference Period 30/09/2000 - 31/03/2002
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        62.0,
        -70.0
      ],
      [
        159.0,
        -70.0
      ],
      [
        159.0,
        -54.0
      ],
      [
        62.0,
        -54.0
      ],
      [
        62.0,
        -70.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Australian Oceans Data Network

Data Source

This dataset was originally found on Australian Oceans Data Network "Australian Antarctic Southern Ocean Profiling Project". Please visit the source to access the original metadata of the dataset:
https://catalogue.aodn.org.au/geonetwork/srv/eng/csw/dataset/australian-antarctic-southern-ocean-profiling-project1