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Major Australian-Antarctic Plate Reorganization at Hawaiian-Emperor Bend Time


Whittaker, J and Muller, RD and Leitchenkov, G and Stagg, H and Sdrolias, M and Gaina, C and Goncharov, A, Major Australian-Antarctic Plate Reorganization at Hawaiian-Emperor Bend Time, Science, 318 pp. 83-86. ISSN 0036-8075 (2007) [Refereed Article]

Copyright Statement

Copyright 2007 AAAS

DOI: doi:10.1126/science.1143769


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 mantledriven 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.

Item Details

Item Type:Refereed Article
Keywords:Australia, Antarctica, Izanagi, subduction, plate reorganization
Research Division:Earth Sciences
Research Group:Geology
Research Field:Marine geoscience
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the earth sciences
UTAS Author:Whittaker, J (Associate Professor Jo Whittaker)
ID Code:84443
Year Published:2007
Web of Science® Times Cited:211
Deposited By:IMAS Research and Education Centre
Deposited On:2013-05-14
Last Modified:2016-12-21

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