DOI: 10.1002/2015GL063507
论文题名: Frictional properties of fault zone gouges from the J-FAST drilling project (Mw 9.0 2011 Tohoku-Oki earthquake)
作者: Remitti F. ; Smith S.A.F. ; Mittempergher S. ; Gualtieri A.F. ; Di Toro G.
刊名: Geophysical Research Letters
ISSN: 0094-8734
EISSN: 1944-8465
出版年: 2015
卷: 42, 期: 8 起始页码: 2691
结束页码: 2699
语种: 英语
英文关键词: amorphous
; friction
; J-FAST project
; smectite-rich gouge
; subduction zones
; Tohoku-Oki earthquake
Scopus关键词: Amorphous materials
; Earthquakes
; Faulting
; Friction
; Grinding (comminution)
; Tribology
; Velocity
; 2011 Tohoku-Oki earthquakes
; Frictional properties
; Integrated ocean drilling programs
; Intermediate velocities
; J-FAST project
; Smectites
; Subduction zones
; Tohoku-Oki earthquakes
; Fault slips
; deformation
; fault propagation
; fault zone
; friction
; plate boundary
; rupture
; slip rate
英文摘要: Smectite-rich fault gouges recovered during Integrated Ocean Drilling Program Expedition 343 (Japan Trench Fast Drilling Project (J-FAST)) from the plate boundary slip zone of the 2011 Mw 9.0 Tohoku-Oki earthquake were deformed at slip velocities of 10 μm s-1 to 3.5 m s-1 and normal stresses up to 12 MPa. Water-dampened gouges (1) are weaker (apparent friction coefficient, μ∗ <0.1) than room-humidity gouges (apparent friction coefficient, μ∗ ∼0.1-0.35) at all slip velocities, (2) are velocity insensitive to velocity weakening at all slip velocities, unlike room-humidity gouges that are velocity strengthening at intermediate velocities (V = 0.001-0.1 m s-1), and (3) have negligible peak μ∗ at high slip velocities (V > 0.1 m s-1). A significant amount of amorphous material formed in room-humidity experiments at low- and high-slip velocities, likely by comminution and disordering of smectite. Our results indicate that the frictional properties of water-dampened gouges could have facilitated propagation of the Tohoku-oki rupture to the trench and large coseismic slip at shallow depths. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84929513152&doi=10.1002%2f2015GL063507&partnerID=40&md5=8045d8d27fc21e15ad0c6c3af137ef57
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8350
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: Dipartimento di Scienze Chimiche e Geologiche, Università di Modena e Reggio Emilia, Modena, Italy
Recommended Citation:
Remitti F.,Smith S.A.F.,Mittempergher S.,et al. Frictional properties of fault zone gouges from the J-FAST drilling project (Mw 9.0 2011 Tohoku-Oki earthquake)[J]. Geophysical Research Letters,2015-01-01,42(8).