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      Seismic anisotropy and mantle deformation: What have we learned from shear wave splitting?

      Reviews of Geophysics

      American Geophysical Union (AGU)

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          Most cited references 228

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          Preliminary reference Earth model

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            Rheology of the upper mantle: a synthesis.

             P Wu,  S Karato (1993)
            Rheological properties of the upper mantle of the Earth play an important role in the dynamics of the lithosphere and asthenosphere. However, such fundamental issues as the dominant mechanisms of flow have not been well resolved. A synthesis of laboratory studies and geophysical and geological observations shows that transitions between diffusion and dislocation creep likely occur in the Earth's upper mantle. The hot and shallow upper mantle flows by dislocation creep, whereas cold and shallow or deep upper mantle may flow by diffusion creep. When the stress increases, grain size is reduced and the upper mantle near the transition between these two regimes is weakened. Consequently, deformation is localized and the upper mantle is decoupled mechanically near these depths.
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              The velocity of compressional waves in rocks to 10 kilobars: 2.

               Francis Birch (1961)
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                Author and article information

                Journal
                Reviews of Geophysics
                Rev. Geophys.
                American Geophysical Union (AGU)
                87551209
                February 1999
                February 1999
                : 37
                : 1
                : 65-106
                10.1029/98RG02075
                © 1999

                http://doi.wiley.com/10.1002/tdm_license_1.1

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                Self URI (article page): http://doi.wiley.com/10.1029/98RG02075

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