DOI: 10.1002/grl.50487
论文题名: Active blind thrusts beneath the Tokyo metropolitan area: Seismic hazards and inversion tectonics
作者: Ishiyama T. ; Sato H. ; Kato N. ; Nakayama T. ; Abe S.
刊名: Geophysical Research Letters
ISSN: 0094-8975
EISSN: 1944-8706
出版年: 2013
卷: 40, 期: 11 起始页码: 2608
结束页码: 2612
语种: 英语
英文关键词: active fault
; blind thrust
; metropolitan Tokyo
; seismic hazard
; subsurface structure
Scopus关键词: Active fault
; blind thrust
; metropolitan Tokyo
; Seismic hazards
; Subsurface structures
; Earthquakes
; Stratigraphy
; Tectonics
; Fault slips
; active fault
; deformation
; earthquake magnitude
; earthquake recurrence
; metropolitan area
; Neogene
; Quaternary
; seismic hazard
; seismic reflection
; slip rate
; urbanization
; Honshu
; Japan
; Kanto
; Tokyo [Kanto]
英文摘要: The Tokyo metropolitan area, underlain by Neogene and Quaternary sediments more than 5 km thick, is currently deformed by blind thrusts that could generate hazardous earthquakes. However, their little geomorphic expression and dense urbanization make understanding of folds produced above them and recent deformation highly elusive. Here we show subsurface geometries of several active blind thrusts beneath this highly urbanized area, based on tectonic landforms, high-resolution seismic reflection data, and Quaternary stratigraphy. Deep seismic reflection profiles corroborate the notion that steeply dipping blind thrusts are reactivated normal faults originally formed by middle Miocene extensional tectonics. Despite very slow (less than 0.1 mm/yr) late Quaternary slip rates, our work suggests the presence of previously unrecognized faults that pose seismic hazards to Tokyo and outlying communities, highlighting the need for additional information to define recent slip rates, magnitude, and recurrence of past earthquakes on them. © 2013 American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879986465&doi=10.1002%2fgrl.50487&partnerID=40&md5=cf3b33bb6e888961c9fcb6a199f4b73e
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6239
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Earthquake Research Institute, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan
Recommended Citation:
Ishiyama T.,Sato H.,Kato N.,et al. Active blind thrusts beneath the Tokyo metropolitan area: Seismic hazards and inversion tectonics[J]. Geophysical Research Letters,2013-01-01,40(11).