A KINEMATIC MODEL FOR RECRYSTALLIZATION AND TEXTURE DEVELOPMENT IN OLIVINE POLYCRYSTALS
- DSpace Home
- →
- Геология России
- →
- ELibrary
- →
- View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.
dc.contributor.author | Kaminski E. | |
dc.contributor.author | Ribe N.M. | |
dc.date.accessioned | 2021-03-11T06:59:48Z | |
dc.date.available | 2021-03-11T06:59:48Z | |
dc.date.issued | 2001 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=764334 | |
dc.identifier.citation | Earth and Planetary Science Letters, 2001, 189, 3-4, 253-267 | |
dc.identifier.issn | 0012-821X | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/26556 | |
dc.description.abstract | 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. | |
dc.subject | DYNAMIC METAMORPHISM | |
dc.subject | RECRYSTALLIZATION | |
dc.subject | SEISMIC CITY | |
dc.subject | ANISOTROPY | |
dc.title | A KINEMATIC MODEL FOR RECRYSTALLIZATION AND TEXTURE DEVELOPMENT IN OLIVINE POLYCRYSTALS | |
dc.type | Статья |
Files in this item
Files | Size | Format | View |
---|---|---|---|
There are no files associated with this item. |
This item appears in the following Collection(s)
-
ELibrary
Метаданные публикаций с сайта https://www.elibrary.ru