DOI: 10.1002/2016GL068377
论文题名: Sound velocities of aluminum-bearing stishovite in the mantle transition zone
作者: Gréaux S. ; Kono Y. ; Wang Y. ; Yamada A. ; Zhou C. ; Jing Z. ; Inoue T. ; Higo Y. ; Irifune T. ; Sakamoto N. ; Yurimoto H.
刊名: Geophysical Research Letters
ISSN: 0094-9052
EISSN: 1944-8783
出版年: 2016
卷: 43, 期: 9 起始页码: 4239
结束页码: 4246
语种: 英语
英文关键词: aluminum
; elasticity
; high pressure
; high temperature
; stishovite
; ultrasonic interferometry
Scopus关键词: Acoustic wave velocity
; Elasticity
; Interferometry
; High pressure
; High temperature
; Mid ocean ridge basalts
; Pressure and temperature
; stishovite
; Temperature derivatives
; Thermal equilibrations
; Ultrasonic interferometry
; Aluminum
; aluminum
; elasticity
; high pressure
; high temperature
; interferometry
; mid-ocean ridge basalt
; mineral property
; sound velocity
; stishovite
; transition zone
; ultrasonics
英文摘要: The elasticity of Al-bearing stishovite with 1.0, 3.3, and 4.5 wt % Al2O3 was investigated in the multianvil apparatus at high pressures and temperatures up to 21 GPa and 1700 K, by ultrasonic interferometry in conjunction with in situ X-ray techniques. The moduli KS and G are found to decrease with increasing Al2O3 content, while their pressure and temperature derivatives do not change in a significant manner for 1.0 and 3.3 wt % Al2O3. The temperature derivatives for 4.5 wt % Al2O3, however, are larger, which may result from a change in the Al substitution mechanism at high Al2O3 content. It is shown that acoustic velocities of any mid-ocean ridge basalt are lower by -0.4% than those calculated from pure stishovite data. Velocity perturbations up to -3.4% (VP) and -4.2% (VS) in subducted slabs are explained by the combination of the thermal equilibration (ΔT ~ 600 K) of the slab and Al enrichment in stishovite. © 2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84970978722&doi=10.1002%2f2016GL068377&partnerID=40&md5=f83cabfa8a2a7d4f73da47333cd2ab5b
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10015
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: Geodynamics Research Center, Ehime University, Matsuyama, Japan
Recommended Citation:
Gréaux S.,Kono Y.,Wang Y.,et al. Sound velocities of aluminum-bearing stishovite in the mantle transition zone[J]. Geophysical Research Letters,2016-01-01,43(9).