DOI: 10.1002/grl.50839
论文题名: Bias in estimates of lithosphere viscosity from interseismic deformation
作者: Hines T.T. ; Hetland E.A.
刊名: Geophysical Research Letters
ISSN: 0094-8689
EISSN: 1944-8420
出版年: 2013
卷: 40, 期: 16 起始页码: 4260
结束页码: 4265
语种: 英语
英文关键词: earthquake cycle
; interseismic deformation
; lithosphere viscosity
Scopus关键词: Apparent viscosity
; Depth dependents
; Earthquake cycles
; Inter-seismic periods
; Interseismic deformations
; Lithospheric mantle
; Uniform viscosity
; Uppermost mantle
; Deformation
; Earthquakes
; Estimation
; Structural geology
; Viscosity
; deformation mechanism
; earthquake epicenter
; estimation method
; fault
; geometry
; lithosphere
; shear zone
; upper mantle
; viscosity
英文摘要: The estimation of uniform viscosities representing the lower crust and uppermost mantle from postseismic or interseismic deformation (i.e., apparent viscosities) is inherently biased with respect to a depth dependence of the viscosities within each layer. Estimates are biased toward a more viscous lower crust or a less viscous lithospheric mantle, depending on the relative geometric mean viscosities of the two layers. When there is a low-viscosity shear zone beneath the fault, apparent viscosities are close to that of the shear zone immediately after the earthquake, although the apparent viscosities increase significantly during the later interseismic period. Inferences made from interseismic deformation that the lower crust is more viscous than the upper mantle may be entirely consistent with depth-dependent viscosity profiles that have a significant increase in viscosity from the lowermost crust to the uppermost mantle. Key Points Inference of lithosphere viscosities from interseismic deformation is biased Bias results from neglecting the depth-dependence of lithosphere viscosities Inferred viscosities are biased to a strong crust and weak mantle. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84882744292&doi=10.1002%2fgrl.50839&partnerID=40&md5=165c13d5a3524fe7c6737a60022e305f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5953
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth and Environmental Sciences, University of Michigan, 2534 CC Little Bldg., 1100 N. University Ave., Ann Arbor, MI 48104, United States
Recommended Citation:
Hines T.T.,Hetland E.A.. Bias in estimates of lithosphere viscosity from interseismic deformation[J]. Geophysical Research Letters,2013-01-01,40(16).