DOI: 10.1002/2014GL062833
论文题名: Rapid slip-deficit rates at the eastern margin of the Tibetan Plateau prior to the 2008 M<inf>w</inf> 7.9 Wenchuan earthquake
作者: Thompson T.B. ; Plesch A. ; Shaw J.H. ; Meade B.J.
刊名: Geophysical Research Letters
ISSN: 0094-8866
EISSN: 1944-8597
出版年: 2015
卷: 42, 期: 6 起始页码: 1677
结束页码: 1684
语种: 英语
英文关键词: detachment
; earthquake cycle
; interseismic
; Longmen Shan
; Tibet
Scopus关键词: Earthquakes
; Faulting
; Geodetic satellites
; Global positioning system
; Surface topography
; Tectonics
; detachment
; Earthquake cycles
; interseismic
; Longmen Shan
; Tibet
; Fault slips
; collision zone
; deformation
; earthquake event
; fold and thrust belt
; geodesy
; slip
; China
; Longmen Mountains
; Qinghai-Xizang Plateau
英文摘要: The Longmen Shan is the steepest topographic front at the India-Asia collision zone and the site of the Mw 7.9 Wenchuan earthquake. Here to explain the interseismic GPS velocities across the greater Longmen Shan region, we develop a boundary element model including earthquake cycle effects, topography, the westward dipping Beichuan Fault and a ∼20km deep, shallowly dipping, detachment, inferred from observed afterslip and from structural considerations. Previous analyses which neglected the detachment and earthquake cycle effects have found shortening rates near zero. In contrast, we find that interseismic GPS data are consistent with a shortening rate of 5.7±1.5mm/yr and maximum surface slip-deficit rate of 9.5±2.5mm/yr. This model unifies the interpretation of geodetic deformation throughout the earthquake cycle and suggests that the Longmen Shan is an active fold-and-thrust belt with of Wenchuan-like recurrence intervals as short as 600 years. Key Points Longmen Shan GPS velocities consistent with 9 mm/yr slip-deficit rates Earthquake cycle model with ramp fault, detachment fault, and surface topography Inference of 600 year recurrence interval for Wenchuan-like earthquakes ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84927726568&doi=10.1002%2f2014GL062833&partnerID=40&md5=3a097afd7f06b1118e87bc1982270d89
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8482
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: Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, United States
Recommended Citation:
Thompson T.B.,Plesch A.,Shaw J.H.,et al. Rapid slip-deficit rates at the eastern margin of the Tibetan Plateau prior to the 2008 M<inf>w</inf> 7.9 Wenchuan earthquake[J]. Geophysical Research Letters,2015-01-01,42(6).