Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL090482 |
Role of Serpentinized Mantle Wedge in Affecting Megathrust Seismogenic Behavior in the Area of the 2010 M=8.8 Maule Earthquake | |
Kelin Wang; Taizi Huang; Frederik Tilmann; Simon M. Peacock; Dietrich Lange | |
2020-10-26 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2020 |
英文摘要 | What controls subduction megathrust seismogenesis downdip of the mantle wedge corner (MWC)? We propose that, in the region of the 2010 Mw=8.8 Maule, Chile, earthquake, serpentine minerals derived from the base of the hydrated mantle wedge exert a dominant control. Based on modeling, we predict that the megathrust fault zone near the MWC contains abundant lizardite/chrysotile‐rich serpentinite that transforms to antigorite‐rich serpentinite at greater depths. From the MWC at 32–40 km depth to at least 55 km, the predominantly velocity‐strengthening megathrust accommodated dynamic propagation of the 2010 rupture but with small slip and negative stress drop. The downdip distribution of interplate aftershocks exhibits a gap around the MWC that can be explained by the velocity‐strengthening behavior of lizardite/chrysotile. Interspersed velocity‐weakening and dynamic weakening antigorite‐rich patches farther downdip may be responsible for increased abundance of aftershocks and possibly for some of the high‐frequency energy radiation during the 2010 rupture. |
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/301879 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Kelin Wang,Taizi Huang,Frederik Tilmann,et al. Role of Serpentinized Mantle Wedge in Affecting Megathrust Seismogenic Behavior in the Area of the 2010 M=8.8 Maule Earthquake[J]. Geophysical Research Letters,2020. |
APA | Kelin Wang,Taizi Huang,Frederik Tilmann,Simon M. Peacock,&Dietrich Lange.(2020).Role of Serpentinized Mantle Wedge in Affecting Megathrust Seismogenic Behavior in the Area of the 2010 M=8.8 Maule Earthquake.Geophysical Research Letters. |
MLA | Kelin Wang,et al."Role of Serpentinized Mantle Wedge in Affecting Megathrust Seismogenic Behavior in the Area of the 2010 M=8.8 Maule Earthquake".Geophysical Research Letters (2020). |
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