气候变化领域集成服务门户(CCPortal): Cohesional Slip on a Plate Subduction Boundary During a Large Earthquake

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DOI	10.1029/2020GL088395
	Cohesional Slip on a Plate Subduction Boundary During a Large Earthquake
	Kameda J.; Hamada Y.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:18
英文摘要	The frontal part of the Japan Trench plate boundary fault, which slipped during the 2011 Tohoku-Oki earthquake (Mw 9.0), is enriched in smectite and is intrinsically weak owing to the high swelling pressure of this mineral. Our rheometric experiments using analog fault materials demonstrate that “cohesional slip,” rather than frictional slip, is a realistic faulting process in the studied fault zone. The cohesional slip can be described by the Bingham plastic model. Consequently, the coseismic shear stress is described by the yield stress and plastic viscosity. Comparison of the results with the average shear stress derived from a previous study suggests that the slip zone thickness for cohesional slip is ~1.3 cm or less. This finding is consistent with textures characterized by discrete slip planes of comparable thickness observed in the recovered fault rocks, suggesting that these slip planes were activated during the Tohoku-Oki earthquake. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Earthquakes; Shear stress; Swelling; Textures; Yield stress; 2011 Tohoku-Oki earthquakes; Average shear stress; Bingham-plastic models; Faulting process; Large earthquakes; Plastic viscosity; Plate boundaries; Tohoku-Oki earthquakes; Faulting; boundary layer; cohesion; coseismic process; earthquake; frontal feature; plate boundary; shear stress; slip; subduction zone; swelling; tectonic plate; Tohoku earthquake 2011; Japan Trench; Pacific Ocean
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169713
作者单位	Department of Earth and Planetary Sciences, Graduate School of Science, Hokkaido University, Sapporo, Japan; Kochi Institute for Core Sample Research, X-star, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Nankoku, Japan
推荐引用方式 GB/T 7714	Kameda J.,Hamada Y.. Cohesional Slip on a Plate Subduction Boundary During a Large Earthquake[J],2020,47(18).
APA	Kameda J.,&Hamada Y..(2020).Cohesional Slip on a Plate Subduction Boundary During a Large Earthquake.Geophysical Research Letters,47(18).
MLA	Kameda J.,et al."Cohesional Slip on a Plate Subduction Boundary During a Large Earthquake".Geophysical Research Letters 47.18(2020).