DOI: 10.1002/2014GL061246
论文题名: Frictional melting of clayey gouge during seismic fault slip: Experimental observation and implications
作者: Han R. ; Hirose T. ; Jeong G.Y. ; Ando J.-I. ; Mukoyoshi H.
刊名: Geophysical Research Letters
ISSN: 0094-9860
EISSN: 1944-9591
出版年: 2014
卷: 41, 期: 15 起始页码: 5457
结束页码: 5466
语种: 英语
英文关键词: clayey gouge
; faults
; frictional melting
; rotary shear tests
; seismic slip
Scopus关键词: Clay minerals
; Faulting
; Friction
; Melting
; Seismology
; Bulk temperatures
; clayey gouge
; Frictional behavior
; Frictional melting
; Humidity conditions
; Seismic slips
; Shallow depths
; Shear tests
; Local melting
; Seismic faults
; Fault slips
; clay mineral
; fault slip
; friction
; melting
英文摘要: Clayey gouges are common in fault slip zones at shallow depths. Thus, the fault zone processes and frictional behaviors of the gouges are critical to understanding seismic slip at these depths. We conducted rotary shear tests on clayey gouge (∼41wt % clay minerals) at a seismic slip rate of 1.3m/s. Here we report that the gouge was melted at 5MPa of normal stress and room humidity conditions. The initial local melting was followed by melt layer formation. Clay minerals (e.g., smectite and illite) and plagioclase were melted and quenched to glass with numerous vesicles. Both flash heating and bulk temperature increases appear to be responsible for the melting. This observation of clayey gouge melting is comparable to that of natural faults (e.g., Chelungpu fault, Taiwan). Due to heterogeneous fault zone properties (e.g., permeability), frictional melting may be one of the important processes in clayey slip zones at shallow depths. Key Points Frictional melting of clayey gouge is observed in shear experiments at 1.3 m/s Melting microstructures are comparable to those from the Chelungpu fault, Taiwan Frictional melting can occur in clayey slip zones during earthquakes © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84905619217&doi=10.1002%2f2014GL061246&partnerID=40&md5=fb9df5b545c21c0727938ac039f53ff2
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7124
Appears in Collections: 气候减缓与适应
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作者单位: Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources, Daejeon, South Korea
Recommended Citation:
Han R.,Hirose T.,Jeong G.Y.,et al. Frictional melting of clayey gouge during seismic fault slip: Experimental observation and implications[J]. Geophysical Research Letters,2014-01-01,41(15).