Seismotectonics of the 2013 Lushan M-w 6.7 earthquake: Inversion   tectonics in the eastern margin of the Tibetan Plateau

doi:10.1002/2017GL074296

CORC > 北京大学 > 地球与空间科学学院

	Seismotectonics of the 2013 Lushan M-w 6.7 earthquake: Inversion tectonics in the eastern margin of the Tibetan Plateau
	Lu, Renqi ; Xu, Xiwei ; He, Dengfa ; John, Suppe ; Liu, Bo ; Wang, Fuyun ; Tan, Xibin ; Li, Yingqiang
刊名	GEOPHYSICAL RESEARCH LETTERS
	2017
关键词	blind fault reactivated fault seismotectonics shear fault-bend folding inversion tectonics Lushan earthquake 2008 WENCHUAN EARTHQUAKE LONGMEN SHAN SICHUAN BASIN M(S)7.0 EARTHQUAKE THRUST CHINA HAZARD EVOLUTION GEOMETRY UPLIFT
DOI	10.1002/2017GL074296
英文摘要	On 20 April 2013, an unexpected M-w 6.7 earthquake occurred in Lushan County at the southern Longmen Shan, the eastern margin of the Tibetan Plateau. A high-resolution seismic reflection profile was combined with near-surface geological data, earthquake relocation and geodetic measurements, and a recent deep artificial seismic reflection profile to identify the active fault and seismotectonics of this earthquake. Three-dimensional imaging of the aftershocks was used to identify two planar faults that together form a y shape (f1 and f2). Seismic interpretations suggest that fault f1 did not break through the overlying Mesozoic and Cenozoic rocks and is a typical blind fault. Geodetic measurements suggest that the coseismic deformation is consistent with the geometry and kinematics of shear fault-bend folding. Deep seismic data indicate the syndepositional nature of fault f1 a preexisting normal fault older than the Triassic, which underwent positive inversion tectonics during the Late Cenozoic. A thrust fault f3 converges with f1 at a depth of approximately 12km with an accumulated slip 3.6km. This 2013 Lushan earthquake triggered by blind faults is a hidden earthquake. Blind and reactivated faults increase the potential risk and uncertainty related to earthquakes in the eastern margin of the Tibetan Plateau.; National Natural Science Foundation of China [41202142, 41430316, 41572117]; Project for Sichuan-Yunnan National Earthquake Experimental Field [2017CESE0102]; Project for Basic Research Work of the Institute of Geology, China Earthquake Administration [IGCEA1422]; SCI(E); ARTICLE; 16; 8236-8243; 44
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/471361]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Lu, Renqi,Xu, Xiwei,He, Dengfa,et al. Seismotectonics of the 2013 Lushan M-w 6.7 earthquake: Inversion tectonics in the eastern margin of the Tibetan Plateau[J]. GEOPHYSICAL RESEARCH LETTERS,2017.
APA	Lu, Renqi.,Xu, Xiwei.,He, Dengfa.,John, Suppe.,Liu, Bo.,...&Li, Yingqiang.(2017).Seismotectonics of the 2013 Lushan M-w 6.7 earthquake: Inversion tectonics in the eastern margin of the Tibetan Plateau.GEOPHYSICAL RESEARCH LETTERS.
MLA	Lu, Renqi,et al."Seismotectonics of the 2013 Lushan M-w 6.7 earthquake: Inversion tectonics in the eastern margin of the Tibetan Plateau".GEOPHYSICAL RESEARCH LETTERS (2017).