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Literature DB >> 23318681

Shear response of Fe-bearing MgSiO(3) post-perovskite at lower mantle pressures.

Abstract

We investigate the shear response of possible slip systems activated in pure and Fe-bearing MgSiO(3) post-perovskite (PPv) through ab initio generalized stacking fault (GSF) energy calculations. Here we show that the [100](001) slip system has the easiest response to plastic shear among ten possible slip systems investigated. Incorporation of Fe(2+) decreases the strength of all slip systems but does not change the plastic anisotropy style. Therefore, pure and Fe-bearing MgSiO(3) PPv should demonstrate similar LPO patterns with a strong signature of the [100](001) slip system. An aggregate with this deformation texture is expected to produce a V(SH) > V(SV) type polarization anisotropy, being consistent with seismological observations.(Communicated by Ikuo KUSHIRO, M.J.A.).

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Year: 2013 PMID： 23318681 PMCID： PMC3611955 DOI： 10.2183/pjab.89.51

Source DB: PubMed Journal: Proc Jpn Acad Ser B Phys Biol Sci ISSN： 0386-2208 Impact factor: 3.493

11 in total

1. Inferences on flow at the base of Earth's mantle based on seismic anisotropy.

Authors: Mark Panning; Barbara Romanowicz
Journal: Science Date: 2004-01-16 Impact factor: 47.728

2. Slip systems in MgSiO3 post-perovskite: implications for D'' anisotropy.

Authors: Lowell Miyagi; Waruntorn Kanitpanyacharoen; Pamela Kaercher; Kanani K M Lee; Hans-Rudolf Wenk
Journal: Science Date: 2010-09-24 Impact factor: 47.728

3. First-principles constraints on diffusion in lower-mantle minerals and a weak D'' layer.

Authors: M W Ammann; J P Brodholt; J Wookey; D P Dobson
Journal: Nature Date: 2010-05-27 Impact factor: 49.962

4. Anisotropy of Earth's D'' layer and stacking faults in the MgSiO3 post-perovskite phase.

Authors: Artem R Oganov; Roman Martonák; Alessandro Laio; Paolo Raiteri; Michele Parrinello
Journal: Nature Date: 2005-12-22 Impact factor: 49.962

5. Temperature profile in the lowermost mantle from seismological and mineral physics joint modeling.

Authors: Kenji Kawai; Taku Tsuchiya
Journal: Proc Natl Acad Sci U S A Date: 2009-12-11 Impact factor: 11.205

6. QUANTUM ESPRESSO: a modular and open-source software project for quantum simulations of materials.

Authors: Paolo Giannozzi; Stefano Baroni; Nicola Bonini; Matteo Calandra; Roberto Car; Carlo Cavazzoni; Davide Ceresoli; Guido L Chiarotti; Matteo Cococcioni; Ismaila Dabo; Andrea Dal Corso; Stefano de Gironcoli; Stefano Fabris; Guido Fratesi; Ralph Gebauer; Uwe Gerstmann; Christos Gougoussis; Anton Kokalj; Michele Lazzeri; Layla Martin-Samos; Nicola Marzari; Francesco Mauri; Riccardo Mazzarello; Stefano Paolini; Alfredo Pasquarello; Lorenzo Paulatto; Carlo Sbraccia; Sandro Scandolo; Gabriele Sclauzero; Ari P Seitsonen; Alexander Smogunov; Paolo Umari; Renata M Wentzcovitch
Journal: J Phys Condens Matter Date: 2009-09-01 Impact factor: 2.333

Shear response of Fe-bearing MgSiO(3) post-perovskite at lower mantle pressures.

1. Inferences on flow at the base of Earth's mantle based on seismic anisotropy.

2. Slip systems in MgSiO3 post-perovskite: implications for D'' anisotropy.

3. First-principles constraints on diffusion in lower-mantle minerals and a weak D'' layer.

4. Anisotropy of Earth's D'' layer and stacking faults in the MgSiO3 post-perovskite phase.

5. Temperature profile in the lowermost mantle from seismological and mineral physics joint modeling.

6. QUANTUM ESPRESSO: a modular and open-source software project for quantum simulations of materials.

7. Spin transition in magnesiowüstite in earth's lower mantle.

8. Implications for plastic flow in the deep mantle from modelling dislocations in MgSiO3 minerals.

9. Post-perovskite phase transition in MgSiO3.

10. Deformation of (Mg,Fe)SiO3 post-perovskite and D'' anisotropy.

1. Seismic anisotropy of the D″ layer induced by (001) deformation of post-perovskite.

2. Modeling defects and plasticity in MgSiO₃ post-perovskite: Part 1-generalized stacking faults.