DOI: 10.1002/grl.50302
论文题名: Shear-induced permeability anisotropy of simulated serpentinite gouge produced by triaxial deformation experiments
作者: Okazaki K. ; Katayama I. ; Noda H.
刊名: Geophysical Research Letters
ISSN: 0094-9197
EISSN: 1944-8928
出版年: 2013
卷: 40, 期: 7 起始页码: 1290
结束页码: 1294
语种: 英语
英文关键词: earthquake
; fluid flow
; friction experiments
; Serpentinite fault gouge
; shear induced-permeability anisotropy
; subduction zone
Scopus关键词: Fault gouge
; Friction experiments
; Heterogeneous distributions
; Heterogeneous fluids
; Orthogonal directions
; Permeability anisotropy
; Spatio-temporal variation
; Subduction zones
; Deformation
; Earthquakes
; Experiments
; Flow of fluids
; Friction
; Kaolinite
; Serpentine
; Tectonics
; Anisotropy
; anisotropy
; antigorite
; fluid flow
; fluid pressure
; friction
; permeability
; pore pressure
; seismicity
; serpentinite
; shear stress
; slip rate
; steady-state equilibrium
; subduction zone
; triaxial test
英文摘要: We have determined the permeability of antigorite serpentinite gouge in three orthogonal directions during frictional experiments using a triaxial gas apparatus to better understand fluid flow in subduction fault zones. The experiments were conducted at room temperature, a confining pressure of 150 MPa, a pore pressure of 100 MPa, and a constant slip rate of 0.58 μm/s. Although the initial permeabilities are similar in all directions, anisotropy develops during deformation, with the permeability normal to the shear plane becoming one order of magnitude lower than in the other directions when the shear stress reaches steady state. Formation of such permeability anisotropies may enhance fluid flow along the subduction plate interface and serpentinite-bearing fault zones, important in evaluating potentially heterogeneous distribution of fluid pressure along the fault and in understanding the spatio-temporal variation in the seismic activity. Key Points Shear deformation of serpentine gouge results a strong permeability anisotropy Fluid flow is enhanced along the interface of subducting plates and fault zones Subduction seismicity is controlled by heterogeneous fluid flow at the boundary ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876889885&doi=10.1002%2fgrl.50302&partnerID=40&md5=626796a9fb549df1b9d962ae366565d4
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6461
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth and Planetary Systems Science, Hiroshima University, 1-3-1 Kagami-yama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
Recommended Citation:
Okazaki K.,Katayama I.,Noda H.. Shear-induced permeability anisotropy of simulated serpentinite gouge produced by triaxial deformation experiments[J]. Geophysical Research Letters,2013-01-01,40(7).