TY - JOUR

T1 - Effect of cation substitution on bridgmanite elasticity

T2 - A key to interpret seismic anomalies in the lower mantle

AU - Fukui, Hiroshi

AU - Yoneda, Akira

AU - Nakatsuka, Akihiko

AU - Tsujino, Noriyoshi

AU - Kamada, Seiji

AU - Ohtani, Eiji

AU - Shatskiy, Anton

AU - Hirao, Naohisa

AU - Tsutsui, Satoshi

AU - Uchiyama, Hiroshi

AU - Baron, Alfred Q.R.

PY - 2016/9/19

Y1 - 2016/9/19

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84988503974&partnerID=8YFLogxK

U2 - 10.1038/srep33337

DO - 10.1038/srep33337

M3 - Article

AN - SCOPUS:84988503974

VL - 6

JO - Scientific Reports

JF - Scientific Reports

SN - 2045-2322

M1 - 33337

ER -