DOI: 10.1002/2015GL066882
论文题名: Fault mirrors in seismically active fault zones: A fossil of small earthquakes at shallow depths
作者: Kuo L.-W. ; Song S.-R. ; Suppe J. ; Yeh E.-C.
刊名: Geophysical Research Letters
ISSN: 0094-9279
EISSN: 1944-9010
出版年: 2016
卷: 43, 期: 5 起始页码: 1950
结束页码: 1959
语种: 英语
英文关键词: fault mirror
; flash heating
; fossil earthquakes
; melt
; silica gel
Scopus关键词: Deformation
; Earthquakes
; Faulting
; Geophysics
; Melting
; Mirrors
; Seismology
; Silica
; Silica gel
; Tectonics
; Coseismic slips
; Flash heating
; Fold-and-thrust belts
; Reverse faults
; Seismic deformation
; Seismically active faults
; Shallow depths
; Small earthquakes
; Fault slips
英文摘要: Fault mirrors (FMs) are naturally polished and glossy fault slip surfaces that can record seismic deformation at shallow depths. They are important for investigating the processes controlling dynamic fault slip. We characterize FMs in borehole samples from the hanging wall damage zone of the active Hsiaotungshi reverse fault, Taiwan. Here we report the first documented occurrence of the combination of silica gel and melt patches coating FMs, with the silica gel resembling those observed on experimentally formed FMs that were cataclastically generated. In addition, the melt patches, which are unambiguous indicators of coseismic slip, suggest that the natural FMs were produced at seismic rates, presumably resulting from flash heating at asperities on the slip surfaces. Since flash heating is efficient at small slip, we propose that these natural FMs represent fossils of small earthquakes, formed in either coseismic faulting and folding or aftershock deformation in the active Taiwan fold-and-thrust belt. © 2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84960420506&doi=10.1002%2f2015GL066882&partnerID=40&md5=31a3737f6167e6fe6e05a91865b00319
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10242
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: Department of Earth Sciences, National Central University, Taoyuan, Taiwan
Recommended Citation:
Kuo L.-W.,Song S.-R.,Suppe J.,et al. Fault mirrors in seismically active fault zones: A fossil of small earthquakes at shallow depths[J]. Geophysical Research Letters,2016-01-01,43(5).