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Global electromagnetic induction constraints on transition-zone water content variations

Author

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  • Anna Kelbert

    (College of Oceanic & Atmospheric Sciences, Oregon State University, Corvallis, Oregon 97331-5503, USA)

  • Adam Schultz

    (College of Oceanic & Atmospheric Sciences, Oregon State University, Corvallis, Oregon 97331-5503, USA)

  • Gary Egbert

    (College of Oceanic & Atmospheric Sciences, Oregon State University, Corvallis, Oregon 97331-5503, USA)

Abstract

Hydrating the mantle Water plays a fundamental role in the Earth's interior, influencing the melting temperature of mantle minerals, the tendency of plumes of mantle melt to form, and the viscosity of the convecting mantle. The electrical conductivity of mantle minerals is influenced significantly by water content. Kelbert et al. have used long-period geomagnetic response functions to derive a global-scale three-dimensional model of electrical conductivity variations in the Earth's mantle. Their study reveals variations in the mantle transition zone (at depths of 410–660 km) of approximately one order of magnitude, with high conductivities associated with cold, seismically fast areas where slabs have subducted. This supports the view that at least some of the water in the transition zone has been carried into that region by cold subducting slabs.

Suggested Citation

  • Anna Kelbert & Adam Schultz & Gary Egbert, 2009. "Global electromagnetic induction constraints on transition-zone water content variations," Nature, Nature, vol. 460(7258), pages 1003-1006, August.
    • Handle: RePEc:nat:nature:v:460:y:2009:i:7258:d:10.1038_nature08257
    DOI: 10.1038/nature08257
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    Cited by:

    1. Wen-Yi Zhou & Ming Hao & Jin S. Zhang & Bin Chen & Ruijia Wang & Brandon Schmandt, 2022. "Constraining composition and temperature variations in the mantle transition zone," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    2. Shiwen Li & Yabin Li & Yanhui Zhang & Zikun Zhou & Junhao Guo & Aihua Weng, 2023. "Remnant of the late Permian superplume that generated the Siberian Traps inferred from geomagnetic data," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    3. Weiwen Chen & Shengji Wei & Weitao Wang, 2024. "Subslab ultra low velocity anomaly uncovered by and facilitating the largest deep earthquake," Nature Communications, Nature, vol. 15(1), pages 1-13, December.

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