DOI: 10.1002/2013GL058601
论文题名: Effect of glass on the frictional behavior of basalts at seismic slip rates
作者: Violay M. ; Di Toro G. ; Gibert B. ; Nielsen S. ; Spagnuolo E. ; Del Gaudio P. ; Azais P. ; Scarlato P.G.
刊名: Geophysical Research Letters
ISSN: 0094-10486
EISSN: 1944-10217
出版年: 2014
卷: 41, 期: 2 起始页码: 348
结束页码: 355
语种: 英语
英文关键词: Basalts
; Earthquakes
; Friction
; Interstitial glass
Scopus关键词: Basalt
; Earthquakes
; Glass
; Seismology
; Tribology
; Bulk melting temperatures
; Crystal fraction
; Friction experiments
; Frictional behavior
; Frictional melting
; Rupture propagation
; Seismic condition
; Thermal softening
; Friction
; basalt
; crystal structure
; friction
; rupture
; seismic survey
; slip rate
英文摘要: We performed 31 friction experiments on glassy basalts (GB) and glass-free basalts (GFB) at slip rates up to 6.5 m s-1 and normal stress up to 40 MPa (seismic conditions). Frictional weakening was associated to bulk frictional melting and lubrication. The weakening distance (Dw) was about 3 times shorter in GB than in GFB, but the steady state friction was systematically higher in GB than in GFB. The shorter Dw in GB may be explained by the thermal softening occurring at the glass transition temperature (Tg ∼500°C), which is lower than the bulk melting temperature (Tm ∼1250°C) of GFB. Postexperiment microanalyses suggest that the larger crystal fraction measured in GB melts results in the higher steady state friction value compared to the GFB melts. The effect of interstitial glass is to facilitate frictional instability and rupture propagation in GB with respect to GFB. ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84892632087&doi=10.1002%2f2013GL058601&partnerID=40&md5=54d01fb9a43700d3fa20a69f14787b54
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7750
Appears in Collections: 气候减缓与适应
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作者单位: Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy
Recommended Citation:
Violay M.,Di Toro G.,Gibert B.,et al. Effect of glass on the frictional behavior of basalts at seismic slip rates[J]. Geophysical Research Letters,2014-01-01,41(2).