Australian Antarctic Southern Ocean Profiling Project

• Other Authors: AADC (owner), AADC, DATA OFFICER (distributor), AADC, DATA OFFICER (custodian), AU/AADC > Australian Antarctic Data Centre, Australia (hasAssociationWith), Australian Antarctic Data Centre (publisher), Australian Antarctic Division (sponsor), O'BRIEN, PHILIP EDWARD (collaborator), O'BRIEN, PHILIP EDWARD (hasPrincipalInvestigator), O'BRIEN, PHILIP EDWARD (author), O'Brien, P. (originator)
• Format: Dataset
• Language: unknown
• Published: Australian Ocean Data Network
• Subjects: elevation; oceans; EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY; Plates; AMD/AU; CEOS; AMD; OCEAN > SOUTHERN OCEAN; GEOGRAPHIC REGION > POLAR; Antarc*; Antarctic; Antarctica; Southern Ocean; West Antarctica
• Online Access: https://researchdata.edu.au/australian-antarctic-southern-profiling-project/2820954

Progress Code: completed Statement: Values provided in temporal and spatial coverage are approximate only. 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.