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  • Title: Major Australian-Antarctic plate reorganization at Hawaiian-Emperor bend time.
    Author: Whittaker JM, Müller RD, Leitchenkov G, Stagg H, Sdrolias M, Gaina C, Goncharov A.
    Journal: Science; 2007 Oct 05; 318(5847):83-6. PubMed ID: 17916729.
    Abstract:
    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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