Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL090576 |
Slab dehydration in Sumatra: Implications for fast and slow earthquakes and arc magmatism | |
Yingfeng Ji; Ruyu Yan; Deng Zeng; Chaodi Xie; Weiling Zhu; Rui Qu; Shoichi Yoshioka | |
2021-01-12 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | The catastrophic 2004 Sumatra‐Andaman Mw9.1 earthquake associated with destructive tsunamis has characterized Sumatra as one of the most dangerous convergence zones. Nevertheless, the effects of the thermohydrous state on the strongly coupled megathrust of the incoming plate remain enigmatic. By using a 3‐D thermomechanical model to compute the temperature variation and the complicated phase transition process of the water‐bearing descending plate which generates unstable thrust slips, we find that Sumatran earthquakes at varying depths are likely under the control of the inter‐ or intraplate hydrothermal regime, which occurs in or close to the petrological metamorphism transition area. The slab dehydration of the water‐rich mid‐ocean‐ridge basalts (MORB) and the ultramafic rocks in the oceanic lithosphere releases a large amount of fluid to the continental wedge and further facilitates arc magmatism. The fluids are prone to upwelling following the subduction channel along the plate interface and thus contribute to the clustering of earthquakes updip of the dehydration front beneath offshore Sumatra. Brittle failure and dehydration embrittlement at depth, along with the temperature differences caused by variant slab geometry, are conjectured to greatly influence the occurrence of fast and slow earthquakes in Sumatra. This article is protected by copyright. All rights reserved. |
领域 | 气候变化 |
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/311369 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Yingfeng Ji,Ruyu Yan,Deng Zeng,et al. Slab dehydration in Sumatra: Implications for fast and slow earthquakes and arc magmatism[J]. Geophysical Research Letters,2021. |
APA | Yingfeng Ji.,Ruyu Yan.,Deng Zeng.,Chaodi Xie.,Weiling Zhu.,...&Shoichi Yoshioka.(2021).Slab dehydration in Sumatra: Implications for fast and slow earthquakes and arc magmatism.Geophysical Research Letters. |
MLA | Yingfeng Ji,et al."Slab dehydration in Sumatra: Implications for fast and slow earthquakes and arc magmatism".Geophysical Research Letters (2021). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论