Abstract
Polycrystalline MgGeO3 post-perovskite was plastically deformed in the diamond anvil cell between 104 and 130 gigapascals confining pressure and ambient temperature. In contrast with phenomenological considerations suggesting (010) as a slip plane, lattice planes near (100) became aligned perpendicular to the compression direction, suggesting that slip on (100) or (110) dominated plastic deformation. With the assumption that silicate post-perovskite behaves similarly at lower mantle conditions, a numerical model of seismic anisotropy in the D″ region implies a maximum contribution of post-perovskite to shear wave splitting of 3.7% with an oblique polarization.
Original language | English (US) |
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Pages (from-to) | 644-646 |
Number of pages | 3 |
Journal | Science |
Volume | 311 |
Issue number | 5761 |
DOIs | |
State | Published - Feb 3 2006 |
All Science Journal Classification (ASJC) codes
- General