DOI: 10.1002/2014GL059805
论文题名: Mineral assemblage anomalies in the slip zone of the 1999 Taiwan Chi-Chi earthquake: Ultrafine particles preserved only in the latest slip zone
作者: Hirono T. ; Kameda J. ; Kanda H. ; Tanikawa W. ; Ishikawa T.
刊名: Geophysical Research Letters
ISSN: 0094-10081
EISSN: 1944-9812
出版年: 2014
卷: 41, 期: 9 起始页码: 3052
结束页码: 3059
语种: 英语
英文关键词: Chelungpu fault
; comminution
; frictional heat
Scopus关键词: Comminution
; Earthquakes
; Grinding (comminution)
; Particles (particulate matter)
; Quartz
; Transmission electron microscopy
; X ray diffraction
; Diffraction intensity
; Frictional heat
; Heating experiment
; Lattice distortions
; Mineral assemblage
; Most recent earthquakes
; Scanning and transmission electron microscopy
; Ultrafine particle
; Faulting
; Chi-Chi earthquake 1999
; coating
; comminution
; heat balance
; identification method
; mineral
; particle size
; slip
英文摘要: We determined mineral assemblages of samples from the Taiwan Chelungpu fault and from milling and heating experiments by using X-ray diffraction and scanning and transmission electron microscopy. The fault system contains three dominant fault zones, the shallowest of which slipped during the 1999 Chi-Chi earthquake. The quartz and clay mineral contents of the primary slip zone were low, and it contained partly amorphous ultrafine particles (several tens of nanometers). Up to 30 weight percent of materials in that zone could not be fit to standard diffraction patterns, whereas nearly 100 weight percent of those in surrounding samples could be. The unfitted component could be attributed to the observed ultrafine particles produced by comminution during the earthquake, because weak diffraction intensities are caused from mineral lattice distortion, granulation, and amorphous coatings. Such particles are a potential proxy for identifying the slip zone of the most recent earthquake along a fault. Key Points Coseismic comminution and heating by slip affect a slip-zone mineral assemblage Coseismic comminution produces ultrafine particles in a slip zone Ultrafine particles could be a proxy for latest slip-zone identification © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84901919114&doi=10.1002%2f2014GL059805&partnerID=40&md5=83387d3a47e086f4dbb48b60b1fb2cf3
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7345
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka, Osaka, Japan
Recommended Citation:
Hirono T.,Kameda J.,Kanda H.,et al. Mineral assemblage anomalies in the slip zone of the 1999 Taiwan Chi-Chi earthquake: Ultrafine particles preserved only in the latest slip zone[J]. Geophysical Research Letters,2014-01-01,41(9).