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首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >'Virtual shear box' experiments of stress and slip cycling within a subduction interface melange
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'Virtual shear box' experiments of stress and slip cycling within a subduction interface melange

机译：“虚拟剪切盒”压力和滑动循环在电影界面内的循环的实验

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What role does the progressive geometric evolution of subduction-related melange 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. (C) 2018 Elsevier B.V. All rights reserved.
机译：俯冲相关的混合物剪切区的渐进几何演化在应变瞬变开发中发挥了什么作用？我们使用“虚拟剪切盒”实验，根据古老的挖掘俯冲界面的露头尺度观测 - 克莱斯尔斯海滩复合体（CBC），新西兰 - 约束米厚的剪切区内滑动工艺的数值模型。 CBC由由互联弱矩阵包围的大型态度夹层主导。在恒定滑动速度边界条件下，CBC的模型产生应力循环行为，伴随着混合脆性粘性变形。这是由于养分泥浆的重组，以及压力桥的逐步发展和崩溃，因为夹具相互阻碍彼此。在恒定的剪切应力边界条件下，模型显示出在快速速率（每年米）的症态发作滑动点缀的相对不活动的时期。这种过程可以有助于发展应变瞬变，例如慢速滑动。 （c）2018年elestvier b.v.保留所有权利。

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