Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/s41467-020-15750-7 |
Oceanic crust recycling controlled by weakening at slab edges | |
Jessica Munch; Taras Gerya; Kosuke Ueda | |
2020-04-24 | |
发表期刊 | Nature
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出版年 | 2020 |
英文摘要 | Retreating subduction zones such as the Lesser Antilles, Gibraltar and Scotia have been migrating towards the Atlantic Ocean by cutting their way through the oceanic crust. This spontaneously retreating subduction is enabled by the development of faults at the edges of the slab, but the physical mechanisms controlling fault propagation and direction remain unknown. Here, using 3D numerical subduction models we show that oceanic lithosphere recycling is mainly controlled by the intensity of strain-induced weakening of fractures forming at the edges of the slab. Intense strain-induced weakening causes predominantly brittle fault propagation and slab narrowing until detachment. Without weakening, preponderantly ductile slab edge propagation occurs, which causes slab widening. This rheological control is not affected by the proximity of non-weakened passive continental margins. Natural examples suggest that slab edges follow convergent paths that could be controlled by fractures weakening due to deep water penetration into the oceanic lithosphere. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/249501 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Jessica Munch,Taras Gerya,Kosuke Ueda. Oceanic crust recycling controlled by weakening at slab edges[J]. Nature,2020. |
APA | Jessica Munch,Taras Gerya,&Kosuke Ueda.(2020).Oceanic crust recycling controlled by weakening at slab edges.Nature. |
MLA | Jessica Munch,et al."Oceanic crust recycling controlled by weakening at slab edges".Nature (2020). |
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