DOI: 10.1002/2015GL063834
论文题名: Overriding plate thickness control on subducting plate curvature
作者: Holt A.F. ; Buffett B.A. ; Becker T.W.
刊名: Geophysical Research Letters
ISSN: 0094-9272
EISSN: 1944-9003
出版年: 2015
卷: 42, 期: 10 起始页码: 3802
结束页码: 3810
语种: 英语
英文关键词: overriding plate
; rheology
; slab curvature
; subduction dynamics
Scopus关键词: Elasticity
; Plasticity
; Rheology
; Bending force
; Key control
; Positive correlations
; Radius of curvature
; Slab curvature
; Subducting plate
; Subduction dynamics
; Plates (structural components)
; bending
; correlation
; curvature
; dissipation
; numerical model
; plate motion
; rheology
; slab
; subduction zone
英文摘要: Subducting plate (SP) curvature exerts a key control on the amount of bending dissipation associated with subduction, and the magnitude of the subduction-resisting bending force. However, the factors controlling the development of SP curvature are not well understood. We use numerical models to quantify the role of SP rheology on the minimum radius of curvature, Rmin . We find that Rmin depends strongly on the SP thickness when the rheology is viscous. This dependence is substantially reduced when the SP behaves plastically, in line with the lack of correlation between Rmin and SP thickness on Earth. In contrast, plasticity leads to a strong positive correlation between Rmin and the overriding plate (OP) thickness. Using an analysis of Rmin versus OP thickness, we show that such a positive correlation exists on Earth. This suggests that OP structure, in conjunction with SP plasticity, is crucial in generating slab curvature systematics on Earth. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84931568560&doi=10.1002%2f2015GL063834&partnerID=40&md5=f6dfbad4b3ca8781fbe7aae155a3f783
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8888
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Earth Sciences, University of Southern California, Los Angeles, CA, United States
Recommended Citation:
Holt A.F.,Buffett B.A.,Becker T.W.. Overriding plate thickness control on subducting plate curvature[J]. Geophysical Research Letters,2015-01-01,42(10).