کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4742108 1641558 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Elastic anisotropy of ferromagnesian post-perovskite in Earth's D” layer
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فیزیک زمین (ژئو فیزیک)
پیش نمایش صفحه اول مقاله
Elastic anisotropy of ferromagnesian post-perovskite in Earth's D” layer
چکیده انگلیسی
We report experimental observation of a sizable elastic anisotropy in a polycrystalline sample of ferromagnesian silicate in post-perovskite (ppv) structure. Using a novel composite X-ray transparent gasket to contain and synthesize ppv in a panoramic diamond-anvil cell along with oblique X-ray diffraction geometry, we observed the anisotropic lattice strain and {1 0 0} or {1 1 0} slip-plane texture in the sample at 140 GPa. We deduced the elasticity tensor (cij), orientation-dependent compressional wave velocities, polarization-dependent shear-wave velocities, and the velocity anisotropy of the silicate ppv. Our results are consistent with calculations and indicate that with sufficient preferred orientation, the elastic anisotropy of this phase can produce large shear-wave splitting.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics of the Earth and Planetary Interiors - Volume 180, Issues 3–4, June 2010, Pages 203-208
نویسندگان
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