DOI: 10.1016/j.tecto.2021.228758
论文题名: Quaternary crustal reactivation of the southwestern Beishan, NW China: The Liuyuan sinistral transpressional duplex
作者: Yang H. ; Cunningham D. ; Yang X.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2021
卷: 803 语种: 英语
英文关键词: Remote sensing
; Bounding faults
; Deformation field
; Field observations
; Growing bodies
; Low strain rates
; Moment magnitudes
; Surrounding regions
; Western China
; Strain rate
; crustal structure
; Internet
; Landsat
; plate motion
; plate tectonics
; remote sensing
; satellite data
; satellite imagery
; seismicity
; Shuttle Radar Topography Mission
; strike-slip fault
; transpression
; Beishan
; China
; Nei Monggol
英文摘要: We report remote sensing evidence and reconnaissance field observations for an actively evolving transpressional duplex 150 km north of Tibet, in the southern Beishan region of western China. We analyze Landsat-8, Google Earth and SRTM-30 data to reveal active fault traces, kinematics, offset contacts and landforms, and the overall duplex geometry in an area of limited recorded seismicity compared to surrounding regions. Eight NE-striking faults transfer sinistral displacement between E-W bounding faults and accommodate N-S shortening by sinistral-reverse displacements that have tilted the internal duplex blocks. The potential moment magnitude of a surface-rupturing event on one fault, that displays a twenty km-long, 1–3 m-high surface scarp, is estimated to be 6.6. Our study adds to the growing body of evidence that suggests the Beishan is a region of subtly expressed, but widespread, continental interior, strike-slip reactivation at low strain rates - challenging the long-held view that the Beishan has anomalous crustal stability within the huge Indo-Eurasia deformation field. © 2021 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170931
Appears in Collections: 气候变化与战略
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作者单位: State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing, China; Department of Environmental Earth Science, Eastern Connecticut State University, Willimantic, CT, United States
Recommended Citation:
Yang H.,Cunningham D.,Yang X.. Quaternary crustal reactivation of the southwestern Beishan, NW China: The Liuyuan sinistral transpressional duplex[J]. Tectonophysics,2021-01-01,803