[Parameters: Topic='OCEANS', Term='BATHYMETRY/SEAFLOOR TOPOGRAPHY']
Australian Antarctic Southern Ocean Profiling ProjectEntry ID: ASAC_1119
Abstract: 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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Start Date: 2000-09-30Stop Date: 2002-03-31
Quality Values provided in temporal and spatial coverage are approximate only.
Access Constraints These data are not yet publicly available for download.
A copy of the referenced publication is available from the provided URL.
Use Constraints This data set conforms to the PICCCBY Attribution License
Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_1119 when using these data.
Data Set Progress
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Email: phil.obrien.ant at gmail.com
J. M. Whittaker, R. D. Muller, G. Leitchenkov, H. Stagg, M. Sdrolias, C. Gaina and A. Goncharov (2007), Major Australian-Antarctic Plate Reorganization at Hawaiian-Emperor Bend Time, Science, 318, 5847, 83-86, doi:DOI: 10.1126/science.1143769
Creation and Review Dates
DIF Creation Date: 2004-02-17
Last DIF Revision Date: 2012-02-06