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Louisville seamount subduction and its implication on mantle flow beneath the central Tonga–Kermadec arc

Author

Listed:
  • Christian Timm

    (GNS Science)

  • Daniel Bassett

    (University of Oxford)

  • Ian J. Graham

    (GNS Science)

  • Matthew I. Leybourne

    (GNS Science
    Present address: ALS Geochemistry, 2103 Dollarton Hwy, North Vancouver, British Columbia, Canada)

  • Cornel E. J. de Ronde

    (GNS Science)

  • Jon Woodhead

    (School of Earth Sciences, University of Melbourne)

  • Daniel Layton-Matthews

    (Queen’s University)

  • Anthony B. Watts

    (University of Oxford)

Abstract

Subduction of intraplate seamounts beneath a geochemically depleted mantle wedge provides a seldom opportunity to trace element recycling and mantle flow in subduction zones. Here we present trace element and Sr, Nd and Pb isotopic compositions of lavas from the central Tonga–Kermadec arc, west of the contemporary Louisville–Tonga trench intersection, to provide new insights into the effects of Louisville seamount subduction. Elevated 206Pb/204Pb, 208Pb/204Pb, 86Sr/87Sr in lavas from the central Tonga–Kermadec arc front are consistent with localized input of subducted alkaline Louisville material (lavas and volcaniclastics) into sub-arc partial melts. Furthermore, absolute Pacific Plate motion models indicate an anticlockwise rotation in the subducted Louisville seamount chain that, combined with estimates of the timing of fluid release from the subducting slab, suggests primarily trench-normal mantle flow beneath the central Tonga–Kermadec arc system.

Suggested Citation

  • Christian Timm & Daniel Bassett & Ian J. Graham & Matthew I. Leybourne & Cornel E. J. de Ronde & Jon Woodhead & Daniel Layton-Matthews & Anthony B. Watts, 2013. "Louisville seamount subduction and its implication on mantle flow beneath the central Tonga–Kermadec arc," Nature Communications, Nature, vol. 4(1), pages 1-9, June.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms2702
    DOI: 10.1038/ncomms2702
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    Cited by:

    1. Xiaohui Li & Osamu Ishizuka & Robert J. Stern & Sanzhong Li & Zhiqing Lai & Ian Somerville & Yanhui Suo & Long Chen & Hongxia Yu, 2024. "A HIMU-like component in Mariana Convergent Margin magma sources during initial arc rifting revealed by melt inclusions," Nature Communications, Nature, vol. 15(1), pages 1-11, December.

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