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Diffusion Creep in Perovskite: Implications for the Rheology of the Lower Mantle
Abstract
High-temperature creep experiments on polycrystalline perovskite (CaTiO 3 ), an analog of (Mg,Fe)SiO 3 perovskite of the lower mantle, suggest that (grain size-sensitive) diffusion creep is important in the lower mantle and show that creep rate is enhanced by the transformation from the orthorhombic to the tetragonal structure. These observations suggest that grain-size reduction after a subducting slab passes through the 670-kilometer discontinuity or after a phase transformation from orthorhombic to tetragonal in perovskite will result in rheological softening in the top portions of the lower mantle.
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Citations
Cited by
Seismic anisotropy and mantle deformation: What have we learned from shear wave splitting?
Savage, M. K. (1999) · Reviews of Geophysics · doi:10.1029/98rg02075 · Cited by 1,312
C60 in Water: Nanocrystal Formation and Microbial Response
Fortner, J. D., Lyon, D. Y., Sayes, C. M., Boyd, A. M., Falkner, J. C., Hotze, E. M., Alemany, L. B., Tao, Y. J., Guo, W., Ausman, K. D., et al. (2005) · Environmental Science & Technology · doi:10.1021/es048099n · Cited by 666
Subduction zones: Observations and geodynamic models
King, S. D. (2001) · Physics of the Earth and Planetary Interiors · doi:10.1016/s0031-9201(01)00218-7 · Cited by 76
Can hotter mantle have a larger viscosity?
Solomatov, V. S. (1996) · Geophysical Research Letters · doi:10.1029/96gl00724 · Cited by 49
Metadata
- Authors
- Karato, S.-I., & Li, P.
- Venue
- Science
- Published
- 1992-03-06
- Volume
- 255
- Issue
- 5049
- Pages
- 1238-1240
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W1973811075
- Cited by
- 164
- References
- 0
- FWCI
- 15.10
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Diffusion Creep in Perovskite: Implications for the Rheology of the Lower Mantle. https://app.cochat.ai/papers/10.1126/science.255.5049.1238
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- Karato, S.-I., & Li, P. (1992). Diffusion Creep in Perovskite: Implications for the Rheology of the Lower Mantle. Science. https://doi.org/10.1126/science.255.5049.1238
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Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
