Fuyun Fault: Long-Term Faulting Behavior under Low Crustal Strain Rate
详细信息
- 责任者：Xu Xiwei (Key Laboratory of Active Tectonics and Volcano ; Institute of Geology ; China Earthquake Administration ; Beijing 100029 ; China) ; Sun Xinzhe
- 刊名：Seismology and Geology
- 出版年：2012
- 卷期：34(4)
- 关键词：走滑断层 ; strike-slip faults ; 地震周期性 ; earthquake periodicity ; 阿尔泰山 ; Altai Mountains
- 页码：p.606-617
- 图表：6 illus., 35 refs.
- 分类号：0500
- issnNo：ISSN0253-4967
- isbnNo：CN11-2192/P
摘要
Field observations and restoration of horizontal offsets from the 3D LiDAR data obtained from 3 sites along the Funyun Fault confirm that the average coseismic right-lateral slip of the 1931 Fuyun earthquake is (6.3±1.2) m,and the slip distribution is unusually flat over its entire length of the Fuyun Fault. Several successive offset landforms are dated at 2 sites by cosmogenic dating method (10Be) to constrain the long-term right-lateral slip rate of (0.76±0.24) mm/a. Then,great earthquakes on the Fuyun Fault,a right-lateral strike-slip fault follow a characteristic slip behavior with a low long-term slip rate and long recurrence interval,which is a faulting response to the far-field strain resulting from the collision between the Indian and Eurasian plates.
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