Neogene history of the West Pacific Warm Pool, Kuroshio and Leeuwin currents

Stephen J Gallagher; Malcolm W Wallace; Chung Leong Li; Belinda Kinna; John T Bye; Kazumi Akimoto; Masayuki Torii

Journal article

Neogene history of the West Pacific Warm Pool, Kuroshio and Leeuwin currents

Stephen J Gallagher, Malcolm W Wallace, Chung Leong Li, Belinda Kinna, John T Bye, Kazumi Akimoto, Masayuki Torii

PALEOCEANOGRAPHY | AMER GEOPHYSICAL UNION | Published : 2009

DOI: 10.1029/2008PA001660

Abstract

Foraminiferal analysis of Miocene to recent strata of the Northwest Shelf of Australia is used to chart West Pacific Warm Pool (WPWP) influence. The assemblage is typified by “larger” foraminifera with ingressions of the Indo‐Pacific “smaller” taxaAsterorotaliaandPseudorotaliaat around 4 Ma and from 1.6 to 0.8 Ma. A review of recent and fossil biogeography of these taxa suggests their stratigraphic distribution can be used to document WPWP evolution. From 10 to 4.4 Ma a lack of biogeographic connectivity between the Pacific and Indian Ocean suggests Indonesian Throughflow (ITF) restriction. During this period, the collision of Australia and Asia trapped warmer waters in the Pacific, creating..

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University of Melbourne Researchers

Stephen Gallagher Author

Malcolm Wallace Author

John Bye Author

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Awarded by ARC Linkage

Awarded by Australian Research Council

Funding Acknowledgements

We thank Justin Parker (Geoscience Australia) and Lukas Hottinger for reading an earlier draft of this paper. The work was partly funded by and ARC Linkage project on the Northwest Shelf LP0219312 and ARC DP0558150. We thank Graham Moss for access to his unpublished data set from the Northwest Shelf [Moss et al., 2004]. We thank the editor Jerry Deckens and two reviewers, Wolfgang Kuhnt and R. Mark Leckie, for their thorough reviews that greatly improved the paper.