气候变化领域集成服务门户(CCPortal): Sound Velocities of Al-Bearing Phase D up to 22 GPa and 1300 K

CCPortal

DOI	10.1029/2020GL088877
	Sound Velocities of Al-Bearing Phase D up to 22 GPa and 1300 K
	Xu C.; Gréaux S.; Inoue T.; Noda M.; Sun W.; Kuwahara H.; Higo Y.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:18
英文摘要	Sound velocities of Al-bearing phase D were investigated up to 22 GPa and 1300 K using in situ synchrotron X-ray techniques combined with ultrasonic measurements in a multianvil apparatus. The isothermal bulk modulus of Al-bearing phase D was found to be ~16.7% lower than that of Mg-endmember, suggesting a strong effect of Al incorporation on the bulk modulus of phase D. Al-bearing phase D has higher P- (VP) and S- (VS) wave velocities compared to other mantle transition zone minerals, up to 4.3% for VP and up to 9.6% for VS compared with hydrous iron-bearing ringwoodite, which might engender reduction of velocity contrast between anhydrous mantle and hydrous slab components. The accumulation of hydrated slab components carrying Al-phase D in the uppermost lower mantle can explain some local negative shear velocity perturbations (ΔVS) up to −1.5%, although ΔVP (−0.5%) is expected to remain below the detection limit of seismological techniques. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Acoustic wave velocity; Elastic moduli; Shear flow; Ultrasonic applications; Al incorporation; Anhydrous mantle; In-situ synchrotrons; Isothermal bulk modulus; Mantle transition zone; Multi-anvil apparatus; Shear velocities; Velocity contrasts; Aluminum compounds; bulk modulus; lower mantle; measurement method; reduction; sound velocity; transition zone; ultrasonics; X-ray analysis
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169749
作者单位	Geodynamics Research Center, Ehime University, Matsuyama, Japan; Institute of Earthquake Forecasting, China Earthquake Administration (CEA), Beijing, China; Earth-Life Science Institute, Tokyo Institute of Technology, Tokyo, Japan; Department of Earth and Planetary Systems Science, Hiroshima University, Higashi-Hiroshima, Japan; Hiroshima Institute of Plate Convergence Region Research (HiPeR), Hiroshima University, Higashi-Hiroshima, Japan; Institute for Planetary Materials, Okayama University, Tottori, Japan; Japan Synchrotron Radiation Research Institute, SPring-8Hyogo, Japan
推荐引用方式 GB/T 7714	Xu C.,Gréaux S.,Inoue T.,et al. Sound Velocities of Al-Bearing Phase D up to 22 GPa and 1300 K[J],2020,47(18).
APA	Xu C..,Gréaux S..,Inoue T..,Noda M..,Sun W..,...&Higo Y..(2020).Sound Velocities of Al-Bearing Phase D up to 22 GPa and 1300 K.Geophysical Research Letters,47(18).
MLA	Xu C.,et al."Sound Velocities of Al-Bearing Phase D up to 22 GPa and 1300 K".Geophysical Research Letters 47.18(2020).