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Inferring nonlinear mantle rheology from the shape of the Hawaiian swell

Author

Listed:
  • N. Asaadi

    (Institute for Advanced Studies in Basic Sciences (IASBS))

  • N. M. Ribe

    (Université Pierre et Marie Curie (Paris 6), Université Paris-Sud, CNRS, Lab FAST, Bâtiment 502, Campus Universitaire, 91405 Orsay, France)

  • F. Sobouti

    (Institute for Advanced Studies in Basic Sciences (IASBS))

Abstract

Diffusion holds sway beneath Hawaii There is still no reliable rheological map to show where each of the two principal rock-deformation mechanisms — diffusion creep and dislocation creep — predominates in Earth's mantle. Asaadi et al. report a technique that could help draw that map. They use a simple fluid-mechanical model to identify an observable quantity — the rate of downstream decay of the anomalous seafloor topography (swell) produced by a hotspot volcano — that can be used to determine rheological behaviour in the vicinity. Comparison of the Hawaiian swell topography with the model's predictions reveals that dislocation creep, not diffusion creep, is the better explanation.

Suggested Citation

  • N. Asaadi & N. M. Ribe & F. Sobouti, 2011. "Inferring nonlinear mantle rheology from the shape of the Hawaiian swell," Nature, Nature, vol. 473(7348), pages 501-504, May.
    • Handle: RePEc:nat:nature:v:473:y:2011:i:7348:d:10.1038_nature09993
    DOI: 10.1038/nature09993
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