作者
Sébastien Merkel, Atsushi Kubo, Lowell Miyagi, Sergio Speziale, Thomas S Duffy, Ho-kwang Mao, Hans-Rudolf Wenk
发表日期
2006/2/3
期刊
Science
卷号
311
期号
5761
页码范围
644-646
出版商
American Association for the Advancement of Science
简介
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.
引用总数
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