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L=A s

Dynamic recrystallization. -r. L=A s. Some Applications. Dewatering due to partial melting and the lithosphere-asthenosphere structure (Karato (1986); Hirth and Kohlstedt (1996); Karato and Jung (1998)) Strength and deformation of subducted slabs

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L=A s

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  1. Dynamic recrystallization -r L=As

  2. Some Applications • Dewatering due to partial melting and the lithosphere-asthenosphere structure (Karato (1986); Hirth and Kohlstedt (1996); Karato and Jung (1998)) • Strength and deformation of subducted slabs (Riedel and Karato (1997); Karato et al. (2001))

  3. Partial melting results in depletion of trace elements including hydrogen leading to hardening.

  4. Karato and Jung (1998)

  5. Hirth and Kohlstedt (1996)

  6. A model of rheological structure of a descending slab in the transition zone Karato et al. (1998) Karato et al. (2001)

  7. Unresolved Problems in Rheology • Rheological stratification: rheology of deep mantle minerals • Lattice-preferred orientation in deep mantle minerals • What controls the grain-size? • What controls the water distribution? • Shear localization • Deformation of a two-phase material

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