DOI: 10.1002/2013GL057578
论文题名: The role of harzburgite layers in the morphology of subducting plates and the behavior of oceanic crustal layers
作者: Yoshida M.
刊名: Geophysical Research Letters
ISSN: 0094-8450
EISSN: 1944-8181
出版年: 2013
卷: 40, 期: 20 起始页码: 5387
结束页码: 5392
语种: 英语
英文关键词: harzburgite layer
; mantle convection
; numerical simulation
; oceanic crust
; subducting plate
; subduction dynamics
Scopus关键词: Harzburgites
; Mantle convection
; Oceanic crust
; Subducting plate
; Subduction dynamics
; Computer simulation
; Morphology
; Numerical models
; Viscosity
; Tectonics
; buckling
; curvature
; harzburgite
; lower mantle
; mantle convection
; morphology
; numerical model
; oceanic crust
; simulation
; subduction
; transition zone
; viscosity
英文摘要: Numerical simulations of mantle convection with semidynamic plate subduction in 3-D geometry is performed to investigate the role of harzburgite layers in the morphology of subducting plates and the behavior of oceanic crustal layers. The results show that a "buckled" crustal layer is observed under the "heel" of the stagnant slab that begins to penetrate into the lower mantle, regardless of the magnitude of the viscosity of the harzburgite layer, δηhrz, when the factor of viscosity increase at the boundary of the upper and lower mantle, δη lm, is larger than 60-100. As δηhrz increases, the curvature of buckling is larger. When δηlm and δηhrz are larger, the volumes of crustal and harzburgite materials trapped in the mantle transition zone (MTZ) are also larger, although almost all of the materials penetrate into the lower mantle. These materials are trapped in the MTZ for over tens of millions of years. Key Points The role of harzburgite layers in the behavior of plates is numerically studied The buckled crustal layer is found under the stagnant slab in this numerical model A factor of viscosity increase at the upper and lower mantle boundary is ∼100 ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84886545316&doi=10.1002%2f2013GL057578&partnerID=40&md5=9a3d128f70fe2702056249b67812724a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5714
Appears in Collections: 气候减缓与适应
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作者单位: Institute for Research on Earth Evolution, Japan Agency for Marine-Earth Science and Technology, 2-15 Natsushima-cho, Yokosuka, Kanagawa 237-0061, Japan
Recommended Citation:
Yoshida M.. The role of harzburgite layers in the morphology of subducting plates and the behavior of oceanic crustal layers[J]. Geophysical Research Letters,2013-01-01,40(20).