Seismic Anisotropy in the Lower Mantle Transition Zone Induced by Lattice Preferred Orientation of Akimotoite
Seismic Anisotropy in the Lower Mantle Transition Zone Induced by Lattice Preferred Orientation of Akimotoite
复制标题
秋元石晶格择优取向引起的下地幔过渡带地震各向异性
DOI:
10.1029/2022gl098549
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发表时间:
2022
影响因子:
5.2
通讯作者:
Higo Yuji
中科院分区:
文献类型:
--
作者:
Guan Longli;Yamazaki Daisuke;Tsujino Noriyoshi;Tange Yoshinori;Higo Yuji
Seismic anisotropy has been widely observed near the subducting slabs in the lower mantle transition zone (MTZ) and is often interpreted by the lattice preferred orientation (LPO) of constituent minerals. Akimotoite is one of the dominant minerals near the cold subducting slabs. Therefore, we conducted the well‐controlled uniaxial and shear deformation experiments on the MgSiO3akimotoite aggregates at 21–23 GPa and 900–1300°C by using the D111‐type Kawai‐type multianvil apparatus. We observed strong LPOs and the most dominant slip system of akimotoite is suggested to be (0001). The elastic wave velocities of deformed samples were calculated to be strong azimuthal and polarization anisotropy with the velocities of horizontally polarized shear waves greater than that of vertically polarized shear waves for the horizontal mantle shearing. Our results provide important implications for the origin of observed seismic anisotropies and the mantle flow directions in the lower MTZ.
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DOI:
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发表时间:
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期刊:
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影响因子:
--
作者:
Se bastien Merkel;H. Wenk;J. Badro;G. Montagnac;P. Gillet;H. Mao;R. Hemley
通讯作者:
R. Hemley
影响因子:
3.9
作者:
Fukao, Yoshio;Obayashi, Masayuki
通讯作者:
Obayashi, Masayuki
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
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通讯作者:
G. D. Price
影响因子:
1.6
作者:
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F. Bundy
影响因子:
18.3
作者:
Ferreira, Ana M. G.;Faccenda, Manuele;Schardong, Lewis
通讯作者:
Schardong, Lewis