Australian Antarctic Southern Ocean Profiling Project

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...

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Bibliographic Details
Other Authors: O'BRIEN, PHILIP EDWARD (hasPrincipalInvestigator), O'BRIEN, PHILIP EDWARD (processor), Australian Antarctic Data Centre (publisher)
Format: Dataset
Language:unknown
Published: Australian Antarctic Data Centre
Subjects:
elevation
oceans
BATHYMETRY/SEAFLOOR TOPOGRAPHY
EARTH SCIENCE
Plates
OCEAN &gt
SOUTHERN OCEAN
GEOGRAPHIC REGION &gt
POLAR
Antarctic
Emperor Seamount Chain
Pacific
Southern Ocean
Tonga
West Antarctica
Antarc*
Antarctica
Online Access:https://researchdata.ands.org.au/australian-antarctic-southern-profiling-project/699435
https://data.aad.gov.au/metadata/records/ASAC_1119
http://nla.gov.au/nla.party-617536
Description
Summary: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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