DOI: 10.1002/2015GL064670
论文题名: Postseismic relaxation in Kashmir and lateral variations in crustal architecture and materials
作者: Bendick R. ; Khan S.F. ; Bürgmann R. ; Jouanne F. ; Banerjee P. ; Khan M.A. ; Bilham R.
刊名: Geophysical Research Letters
ISSN: 0094-9557
EISSN: 1944-9288
出版年: 2015
卷: 42, 期: 11 起始页码: 4375
结束页码: 4383
语种: 英语
英文关键词: crustal rheology
; Himalaya
; Kashmir earthquake
; postseismic deformation
Scopus关键词: Deformation
; Finite element method
; Tectonics
; Viscoelasticity
; Viscosity
; 2005 Kashmir earthquake
; Crustal rheology
; Himalayas
; Horizontal displacements
; Kashmir earthquake
; Main boundary thrusts
; Postseismic deformation
; Surface displacement
; Earthquakes
英文摘要: Thirty horizontal displacement time series from GPS sites in the area around the 2005 Kashmir earthquake show lateral spatial variations in displacement magnitude and relaxation time for the postseismic interval from 2005 to 2012. The observed spatial pattern of surface displacements can only be reproduced by finite element models of postseismic deformation in elastic over viscoelastic crust that include lateral differences in both the thickness of the elastic layer and the viscosity of the viscoelastic layer. Solutions reproducing the sign of horizontal displacements everywhere in the epicentral region also require afterslip on the portion of the fault dislocation in the viscoelastic layer but not in the elastic lid. Although there are substantial tradeoffs among contributions to postseismic displacements of the surface, the observations preclude both crustal homogeneity and shallow afterslip. In the best family of solutions, the thickness of the elastic upper crust differs by a factor of 5 and the viscosity of the middle and lower crust by an order of magnitude between domains north and south of a suture zone containing the Main Boundary Thrust and Main Mantle Thrust. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84934441214&doi=10.1002%2f2015GL064670&partnerID=40&md5=6c09e5ca3aee4dc2df8238da3f77289e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9172
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 Geosciences, University of Montana, Missoula, MT, United States
Recommended Citation:
Bendick R.,Khan S.F.,Bürgmann R.,et al. Postseismic relaxation in Kashmir and lateral variations in crustal architecture and materials[J]. Geophysical Research Letters,2015-01-01,42(11).