Аннотация
Seismological observations show that, in some regions of the lower mantle, an increase in bulk sound velocity, interestingly, occurs in the same volume where there is a decrease in shear velocity. We show that this anti-correlated behavior occurs on cation substitution in bridgmanite by making single crystal elasticity measurements of MgSiO 3 and (Mg,Fe,Al)(Si,Al)O 3 using inelastic x-ray scattering in the ambient conditions. Cation substitution of ferrous iron and aluminum may explain large low shear velocity provinces in the lower mantle.
Язык оригинала | английский |
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Номер статьи | 33337 |
Журнал | Scientific Reports |
Том | 6 |
DOI | |
Состояние | Опубликовано - 19 сен 2016 |
Опубликовано для внешнего пользования | Да |