DOI: 10.1002/grl.50469
论文题名: Microfractures within the fault damage zone record the history of fault activity
作者: Mizoguchi K. ; Ueta K.
刊名: Geophysical Research Letters
ISSN: 0094-9048
EISSN: 1944-8779
出版年: 2013
卷: 40, 期: 10 起始页码: 2023
结束页码: 2027
语种: 英语
英文关键词: active fault
; fault damage zone
; history of fault activity
; microfracture density
Scopus关键词: Active fault
; Earthquake events
; Fault activity
; Fault damage zone
; Healing temperature
; Micro-fracture
; Off-fault damage
; Sedimentary covers
; Earthquakes
; Structural geology
; Faulting
; earthquake event
; fault zone
; fracture
; paleoseismicity
; prediction
; Quaternary
; temperature effect
英文摘要: For faults without sedimentary covers, there is no robust method to obtain paleoseismic data that is crucial for the prediction of future damaging earthquake events. Sudden failure along faults during earthquakes induces off-fault damage surrounding such basement faults. We showed that the Quaternary-active fault has the damage zone characterized by a fracture density that decays exponentially with distance from the fault for both healed and open microfractures. In contrast, Quaternary-inactive faults contain only healed microfracture damage zone. Cross-cutting relationships between microfractures and a minimum healing temperature of ∼100°C suggest that healed microfractures formed before, and at deeper levels, than did unhealed microfractures. The damage zone defined by open microfractures reflects the recent fault movement during exhumation, associated with erosion and regional uplift, from the maximum depth at which microfractures may remain unhealed. Microfracture analysis can therefore be used to examine the history of basement fault activity. ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879895711&doi=10.1002%2fgrl.50469&partnerID=40&md5=d636fc435b90917d467ece49fc84985f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6312
Appears in Collections: 气候减缓与适应
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作者单位: Geosphere Science Sector, Civil Engineering Research Laboratory, Central Research Institute of Electric Power Industry (CRIEPI), Abiko 270-1194, Japan
Recommended Citation:
Mizoguchi K.,Ueta K.. Microfractures within the fault damage zone record the history of fault activity[J]. Geophysical Research Letters,2013-01-01,40(10).