GSTDTAP  > 气候变化
DOI10.1002/2017GL074826
Thermal State, Slab Metamorphism, and Interface Seismicity in the Cascadia Subduction Zone Based On 3-D Modeling
Ji, Yingfeng1; Yoshioka, Shoichi1,2; Banay, Yuval A.2
2017-09-28
发表期刊GEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
EISSN1944-8007
出版年2017
卷号44期号:18
文章类型Article
语种英语
国家Japan
英文摘要

Giant earthquakes have repeatedly ruptured the Cascadia subduction zone, and similar earthquakes will likely also occur there in the near future. We employ a 3-D time-dependent thermomechanical model that incorporates an up-to-date description of the slab geometry to study the Cascadia subduction thrust. Results show a distinct band of 3-D slab dehydration that extends from Vancouver Island to the Seattle Basin and farther southward to the Klamath Mountains in northern California, where episodic tremors cluster. This distribution appears to include a region of increased dehydration in northern Cascadia. The phenomenon of heterogeneous megathrust seismicity associated with oblique subduction suggests that the presence of fluid-rich interfaces generated by slab dehydration favors megathrust seismogenesis in the northern part of this zone. The thin, relatively weakly metamorphosed Explorer, Juan de Fuca, and Gorda Plates are associated with an anomalous lack of thrust earthquakes, and metamorphism that occurs at temperatures of 500-700 degrees C near the Moho discontinuity may represent a key factor in explaining the presence of the associated episodic tremor and slip (ETS), which requires a young oceanic plate to subduct at a small dip angle, as is the case in Cascadia and southwestern Japan. The 3-D intraslab dehydration distribution suggests that the metamorphosed plate environment is more complex than had previously been believed, despite the existence of channeling vein networks. Slab amphibolization and eclogitization near the continental Moho depth is thus inferred to account for the resultant overpressurization at the interface, facilitating the generation of ETS and the occurrence of small to medium thrust earthquakes beneath Cascadia.


英文关键词Cascadia thermal regime slab dehydration 3-D model
领域气候变化
收录类别SCI-E
WOS记录号WOS:000413148100016
WOS关键词FORE-ARC MANTLE ; SEISMOGENIC ZONE ; EPISODIC TREMOR ; EARTHQUAKE ; BENEATH ; RUPTURE ; MARGIN ; JAPAN ; DEHYDRATION ; MAGNITUDE
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
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/25870
专题气候变化
作者单位1.Kobe Univ, Res Ctr Urban Safety & Secur, Kobe, Hyogo, Japan;
2.Kobe Univ, Grad Sch Sci, Dept Planetol, Kobe, Hyogo, Japan
推荐引用方式
GB/T 7714
Ji, Yingfeng,Yoshioka, Shoichi,Banay, Yuval A.. Thermal State, Slab Metamorphism, and Interface Seismicity in the Cascadia Subduction Zone Based On 3-D Modeling[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(18).
APA Ji, Yingfeng,Yoshioka, Shoichi,&Banay, Yuval A..(2017).Thermal State, Slab Metamorphism, and Interface Seismicity in the Cascadia Subduction Zone Based On 3-D Modeling.GEOPHYSICAL RESEARCH LETTERS,44(18).
MLA Ji, Yingfeng,et al."Thermal State, Slab Metamorphism, and Interface Seismicity in the Cascadia Subduction Zone Based On 3-D Modeling".GEOPHYSICAL RESEARCH LETTERS 44.18(2017).
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Ji, Yingfeng]的文章
[Yoshioka, Shoichi]的文章
[Banay, Yuval A.]的文章
百度学术
百度学术中相似的文章
[Ji, Yingfeng]的文章
[Yoshioka, Shoichi]的文章
[Banay, Yuval A.]的文章
必应学术
必应学术中相似的文章
[Ji, Yingfeng]的文章
[Yoshioka, Shoichi]的文章
[Banay, Yuval A.]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

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。