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Synchronous motion of the Easter mantle plume and the East Pacific Rise

Author

Listed:
  • John M. O’Connor

    (Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
    Vrije Universiteit Amsterdam)

  • Marcel Regelous

    (Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU))

  • Karsten M. Haase

    (Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU))

  • Christophe Hemond

    (rue Dumont Durville)

  • Anthony A. P. Koppers

    (Oregon State University)

  • Daniel P. Miggins

    (Oregon State University)

  • Daniel E. Heaton

    (Oregon State University)

Abstract

The Easter mantle plume has produced one of the longest hotspot tracks in the Pacific Ocean. While previous studies have focused on the eastern side extending across the Nazca Plate, we use 40Ar/39Ar isotopic and geochemical data to investigate the less explored western side around the Easter Microplate. We propose a dynamic model in which a deeper (600 km-depth), less buoyant mantle exerts a westward force on the East Pacific Rise (EPR), while a more buoyant plume region drives Easter hotspot volcanism and a localised acceleration in seafloor spreading. Our findings suggest that the Easter hotspot is the more focused surface expression of the most buoyant region of a vast, deep-seated mantle plume extending from the Pacific Large Low Shear Velocity Province (LLSVP). This challenges the traditional view of hotspots as isolated phenomena and suggests they are part of broader LLSVP-related mantle structures. Our results imply a more intricate, large-scale relationship between hotspots, mantle plumes, spreading ridges, and mantle dynamics.

Suggested Citation

  • John M. O’Connor & Marcel Regelous & Karsten M. Haase & Christophe Hemond & Anthony A. P. Koppers & Daniel P. Miggins & Daniel E. Heaton, 2024. "Synchronous motion of the Easter mantle plume and the East Pacific Rise," Nature Communications, Nature, vol. 15(1), pages 1-16, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-54115-2
    DOI: 10.1038/s41467-024-54115-2
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    References listed on IDEAS

    as
    1. S. M. Carbotte & C. Small & K. Donnelly, 2004. "The influence of ridge migration on the magmatic segmentation of mid-ocean ridges," Nature, Nature, vol. 429(6993), pages 743-746, June.
    2. M. G. Jackson & J. G. Konter & T.W. Becker, 2017. "Primordial helium entrained by the hottest mantle plumes," Nature, Nature, vol. 542(7641), pages 340-343, February.
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