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Showing 1–8 of 8 results
Advanced filters: Author: Frédéric Deschamps Clear advanced filters

  • Seismic data have identified large-scale compositional heterogeneities in Earth’s deep mantle, but their origin is debated. Numerical modelling demonstrates that seismological and geochemical constraints on the character of these heterogeneities can be satisfied if they are composed of primitive material formed early in Earth’s history.

    • Frédéric Deschamps
    • Edouard Kaminski
    • Paul J. Tackley
    Research
    Nature Geoscience
    Volume: 4, P: 879-882

  • Hints from seismic tomography and geochemistry indicate that Earth's mantle is heterogeneous at large scale. Numerical simulations of mantle convection show that, if it started enriched in silicates, the lower mantle may remain unmixed today.

    • Frédéric Deschamps
    News & Views
    Nature Geoscience
    Volume: 10, P: 161

  • Ocean island lavas have complex geochemical signatures. Numerical simulations suggest that these signatures may reflect the entrainment and transport to Earth's surface of both primordial material and recycled oceanic crust by deeply rooted mantle plumes.

    • Frédéric Deschamps
    News & Views
    Nature Geoscience
    Volume: 7, P: 330-331

  • The fate of water carried by subducted slabs to the deep Earth remains unclear. Experiments suggest that water is unlikely to escape the slabs when they reach the core–mantle boundary despite high pressures and temperatures.

    • Frédéric Deschamps
    News & Views
    Nature Geoscience
    Volume: 17, P: 590-591

  • Thermal conductivity of Earth’s core affects Earth’s thermal structure, evolution and dynamics. Based on thermal conductivity measurements of iron–silicon alloys at high pressure and temperature conditions, the authors here propose Earth’s inner core could be older than previously expected.

    • Wen-Pin Hsieh
    • Alexander F. Goncharov
    • Jung-Fu Lin
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-7