DOI: 10.1002/grl.50780
论文题名: Influences of temperature-dependent thermal conductivity on surface heat flow near major faults
作者: So B.-D. ; Yuen D.A.
刊名: Geophysical Research Letters
ISSN: 0094-8739
EISSN: 1944-8470
出版年: 2013
卷: 40, 期: 15 起始页码: 3868
结束页码: 3872
语种: 英语
英文关键词: insulating effect
; strong fault
; surface heat flow
; variable conductivity
Scopus关键词: Finite element simulations
; Frictional heating
; insulating effect
; Surface heat flow
; Surface heat fluxes
; Temperature-dependent thermal conductivity
; Thermal-insulating
; Thermo-mechanical effects
; Friction
; Heat flux
; Thermal conductivity
; crust-mantle boundary
; fault
; finite element method
; heat flow
; heat flux
; shear strength
; surface flux
; thermal conductivity
; thermomechanics
; Calluna vulgaris
英文摘要: We studied the thermomechanical effects on surface heat flow near major faults from positive feedback between temperature-dependent thermal conductivity k(T) ∝ (1/T)b and frictional heating in a crust-lithosphere system using finite element simulations. Variable conductivity and frictional heating cause a drastic reduction in the thermal conductivity, and these changes can impact the heat flux. When b = 1, the temperature is 400 K higher around the fault than in the uniform conductivity case. This is caused by the reduction in thermal conductivity. In spite of the high temperature around the fault in the variable conductivity cases, the surface heat flux is 30% (for b = 0.5) to 50% (for b = 1) lower than in the uniform conductivity case. This thermal insulating effect may explain the lack of heat flow anomalies near major faults and is consistent with previous hypotheses about the nature of the shear strength associated with these faults. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84881462457&doi=10.1002%2fgrl.50780&partnerID=40&md5=9ec2a3fc1d2827e3367767e87f5eb036
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6003
Appears in Collections: 气候减缓与适应
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作者单位: School of Earth and Environmental Sciences, Seoul National University, Sillim-dong, Gwanak-gu, Seoul 151-742, South Korea
Recommended Citation:
So B.-D.,Yuen D.A.. Influences of temperature-dependent thermal conductivity on surface heat flow near major faults[J]. Geophysical Research Letters,2013-01-01,40(15).