Statistics – Applications
Scientific paper
Jul 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001e%26psl.189..253k&link_type=abstract
Earth and Planetary Science Letters, Volume 189, Issue 3-4, p. 253-267.
Statistics
Applications
45
Scientific paper
The interpretation of seismic anisotropy in the mantle requires a knowledge of the relationship between the lattice preferred orientation (LPO) of crystals and the convective flow field. In order better to understand this link, we present a model for the evolution of LPO in olivine aggregates that deform by both intracrystalline slip and dynamic recrystallization. Dynamic recrystallization depends on the dislocation density of the grains, which is a function of the applied local stress. Grains with a large density of dislocations lower their bulk strain energy by nucleating strain-free sub-grains at a rate proportional to a dimensionless nucleation parameter λ*. Grains with high energy are then invaded by grains with low energy by grain-boundary migration, at a rate proportional to a dimensionless grain-boundary mobility M*. The value of λ* is constrained by observed LPO patterns in experimentally deformed olivine aggregates, and M* is constrained by the temporal evolution of the strength of the LPO. For M*=125+/-75 and λ*>3, the model predictions agree well with the experimental results. Numerical calculations of LPO using our model are significantly faster than those based on viscoplastic self-consistent or equilibrium-based theories, making the model especially suitable for applications for complex convective flows.
Kaminski Edouard
Ribe Neil M.
No associations
LandOfFree
A kinematic model for recrystallization and texture development in olivine polycrystals does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A kinematic model for recrystallization and texture development in olivine polycrystals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A kinematic model for recrystallization and texture development in olivine polycrystals will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1777503