DOI: 10.1016/j.epsl.2018.01.035
Scopus记录号: 2-s2.0-85044397304
论文题名: “Virtual shear box” experiments of stress and slip cycling within a subduction interface mélange
作者: Webber S. ; Ellis S. ; Fagereng Å.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 488 起始页码: 27
结束页码: 35
语种: 英语
英文关键词: Chrystalls Beach Complex
; mélange
; numerical modeling
; strain transients
; stress
; subduction
Scopus关键词: Beaches
; Boundary conditions
; Shear stress
; Stresses
; Chrystalls Beach Complex
; Constant shear
; Strain transients
; Stress boundary conditions
; Stress cycling
; subduction
; Subduction interface
; Viscous deformation
; Numerical models
英文摘要: What role does the progressive geometric evolution of subduction-related mélange shear zones play in the development of strain transients? We use a “virtual shear box” experiment, based on outcrop-scale observations from an ancient exhumed subduction interface – the Chrystalls Beach Complex (CBC), New Zealand – to constrain numerical models of slip processes within a meters-thick shear zone. The CBC is dominated by large, competent clasts surrounded by interconnected weak matrix. Under constant slip velocity boundary conditions, models of the CBC produce stress cycling behavior, accompanied by mixed brittle-viscous deformation. This occurs as a consequence of the reorganization of competent clasts, and the progressive development and breakdown of stress bridges as clasts mutually obstruct one another. Under constant shear stress boundary conditions, the models show periods of relative inactivity punctuated by aseismic episodic slip at rapid rates (meters per year). Such a process may contribute to the development of strain transients such as slow slip. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109985
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Victoria University of Wellington, Wellington, New Zealand; GNS Science, Lower Hutt, New Zealand; Cardiff University, Cardiff, United Kingdom
Recommended Citation:
Webber S.,Ellis S.,Fagereng Å.. “Virtual shear box” experiments of stress and slip cycling within a subduction interface mélange[J]. Earth and Planetary Science Letters,2018-01-01,488