DOI: 10.1002/2015GL067363
论文题名: Along-trench variations in the seismic structure of the incoming Pacific plate at the outer rise of the northern Japan Trench
作者: Fujie G. ; Kodaira S. ; Sato T. ; Takahashi T.
刊名: Geophysical Research Letters
ISSN: 0094-9437
EISSN: 1944-9168
出版年: 2016
卷: 43, 期: 2 起始页码: 666
结束页码: 673
语种: 英语
英文关键词: oceanic plate
; outer rise
; pseudofault
; Vp/Vs ratio
; water content
; wide-angle seismic survey
Scopus关键词: Fracture
; Geological surveys
; Seismic waves
; Seismology
; Surveys
; Tectonics
; Water content
; Oceanic plate
; Outer rise
; Pseudofault
; Seismic surveys
; Vp/Vs ratio
; Plates (structural components)
; atmosphere-ocean coupling
; fracture zone
; hydration
; oceanic crust
; outer core
; Pacific plate
; pseudotachylite
; seismic method
; seismic survey
; seismic velocity
; seismicity
; subduction
; topography
; transportation
; water content
; Japan Trench
; Pacific Ocean
英文摘要: To investigate along-trench variations in the seismic structure of the incoming oceanic plate and their effect on water transportation by the oceanic plate, we conducted a wide-angle seismic survey of a trench-parallel transect 270 km long on the outer rise of the northern Japan Trench. The resulting seismic structure models show that the central part of the transect is characterized by rough topography, thick oceanic crust, low seismic velocities, and high Vp/Vs ratios, suggesting pervasive fracturing and high water content (hydration) there. These observations are consistent with the presence of an ancient fracture zone associated with ridge propagation. The trenchward extension of this fracture zone corresponds to an area of low interplate seismicity, low seismic velocities, and high Vp/Vs ratio around the depth of the subduction interface. Our results suggest that this ancient scar on the oceanic plate influences along-trench variations in interplate seismic coupling through its effect on water transportation. © 2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956597998&doi=10.1002%2f2015GL067363&partnerID=40&md5=40a5645d146b62054bdca5d22d927382
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10400
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: CEAT/JAMSTEC, Yokohama, Japan
Recommended Citation:
Fujie G.,Kodaira S.,Sato T.,et al. Along-trench variations in the seismic structure of the incoming Pacific plate at the outer rise of the northern Japan Trench[J]. Geophysical Research Letters,2016-01-01,43(2).