DOI: 10.1002/2015GL063195
论文题名: Trace element anomaly in fault rock induced by coseismic hydrothermal reactions reproduced in laboratory friction experiments
作者: Tanikawa W. ; Ishikawa T. ; Honda G. ; Hirono T. ; Tadai O.
刊名: Geophysical Research Letters
ISSN: 0094-8704
EISSN: 1944-8435
出版年: 2015
卷: 42, 期: 9 起始页码: 3210
结束页码: 3217
语种: 英语
英文关键词: coseismic fluid-rock interaction
; frictional experiment
; frictional heating
; thermal pressurization
Scopus关键词: Atmospheric temperature
; Lithium
; Surface properties
; Trace elements
; Tribology
; Fluid-rock interaction
; Friction coefficients
; Friction experiments
; Frictional heating
; Hydrothermal reaction
; Reaction temperature
; Thermal pressurization
; Trace element analysis
; Friction
; coseismic process
; deformation
; friction
; hydrothermal system
; pore pressure
; sliding
; trace element
; water-rock interaction
; Chelungpu Fault Zone
; Taiwan
英文摘要: Friction experiments at high velocities (0.1 to 0.4m/s) at room temperature under high pore fluid pressures (2 or 5MPa) and trace element analyses of the run products were carried out on simulated fault gouge derived from the Chelungpu fault, Taiwan. The friction coefficient decreased to ∼0.1 during sliding, and the slip surface temperature reached 300°C by 6m of slip displacement. The slip caused a small, but distinct decrease of Li in the deformed gouge when the slip surface temperature exceeded 300°C. The observed Li depletion agreed with calculated results, indicating that it resulted from a hydrothermal reaction at a high temperature produced by short-duration (up to 40s) frictional heating. The geochemical data suggest a small fluid/rock ratio and low reaction temperature in the simulated fault, which is explained by higher normal stress or repeated earthquakes which elevated fluid-rock ratios in the natural fault. Key Points Frictional heating under water caused a distinct decrease of Li Li depletion occurred when temperature of slip surface exceeded 300°C Fluid/rock ratio and temperature rise control water-rock interaction ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84930474711&doi=10.1002%2f2015GL063195&partnerID=40&md5=70a5a68d01556734f23edbfbce150138
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8320
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: Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology, Nankoku, Japan
Recommended Citation:
Tanikawa W.,Ishikawa T.,Honda G.,et al. Trace element anomaly in fault rock induced by coseismic hydrothermal reactions reproduced in laboratory friction experiments[J]. Geophysical Research Letters,2015-01-01,42(9).