Magnetic mineral characterization close to the Yingxiu-Beichuan fault surface rupture zone of the Wenchuan earthquake (Mw 7.9, 2008) and its implication for earthquake slip processes

2016 ◽  
Vol 115 ◽  
pp. 468-479 ◽  
Author(s):  
Dongliang Liu ◽  
Haibing Li ◽  
Teh-Quei Lee ◽  
Zhiming Sun ◽  
Jiang Liu ◽  
...  
Keyword(s):  
Wenchuan Earthquake ◽  
Rupture Zone ◽  
Magnetic Mineral ◽  
Surface Rupture ◽  
Fault Surface ◽  
Surface Rupture Zone ◽  
The Wenchuan Earthquake ◽  
Beichuan Fault ◽  
Mineral Characterization

Investigation on Highway Damages Caused by the Wenchuan Earthquake: Geological Disasters

2021 ◽  
Author(s):  
Chen Lesheng
Keyword(s):  
Debris Flow ◽  
Wenchuan Earthquake ◽  
Current Situation ◽  
Rupture Zone ◽  
Surface Rupture ◽  
Geological Disasters ◽  
Surface Rupture Zone ◽  
The Wenchuan Earthquake ◽  
Geological Disaster ◽  
Simple Language

Starting with introduction to the geologic environment, this book elaborates the theory, cause, and current situation about the highway damages in the Wenchuan Earthquake Stricken Area in simple language on the basis of a great deal of full and accurate investigation data about the Wenchuan Earthquake and post-earthquake geological disasters. These results provide valuable technical support for the reconstruction of post-earthquake highways and prevention of post-earthquake geological disasters. This book, the pictures and their accompanying text are both excellent. This book is divided into fourteen chapters, covering geological disaster review, surface rupture zone and liquefaction, collapses and landslide and post-earthquake secondary debris flow, as well as a large number of precious affected highway examples.

scholarly journals Coseismic fluid–rock interactions in the Beichuan-Yingxiu surface rupture zone of the Mw 7.9 Wenchuan earthquake and its implication for the fault zone transformation

2020 ◽  
Author(s):  
Yangyang Wang ◽  
Xiaoqi Gao ◽  
Sijia Li ◽  
Shiyuan Wang ◽  
Deyang Shi ◽  
...  
Keyword(s):  
Wenchuan Earthquake ◽  
Fault Zone ◽  
Structural Characteristics ◽  
Damage Zone ◽  
Major Elements ◽  
Rupture Zone ◽  
Surface Rupture ◽  
Fault Rock ◽  
Surface Rupture Zone ◽  
Geochemical Variations

Abstract. Mechanism of fluids in modifying mineralogy and geochemistry of the fault zone and the role of rock-fluid interaction in the faulting weakening is still debatable. Through analyzing mineralogical compositions, major elements as well as micro-structural characteristics of outcrop samples including wall rocks, low damage zone, high damage zone and oriented fault gouge samples from principal slip zone gouges, mineralogical and geochemical variations of the fault-rocks is observed from Shaba outcrop of Beichuan-Yingxiu surface rupture zone of the Mw 7.9 Wenchuan earthquake, China. The element enrichment/depletion pattern of fault rock shows excellent consistency with the variation pattern of minerals in terms of the notable feldspar alteration and decomposition, decarbonization, coseismic illitization, and chloritization that occurs in the fault zone. The Isocon analysis indicates that the overall mass loss amount of the Shaba fault zone is ranked as low damage zone 

scholarly journals Soil gas distribution in the main coseismic surface rupture zone of the 1980, M s  = 6.9, Irpinia earthquake (southern Italy)

2014 ◽  
Vol 119 (3) ◽  
pp. 2440-2461 ◽  
Author(s):  
Giancarlo Ciotoli ◽  
Sabina Bigi ◽  
Chiara Tartarello ◽  
Pietro Sacco ◽  
Salvatore Lombardi ◽  
...  
Keyword(s):  
Southern Italy ◽  
Soil Gas ◽  
Rupture Zone ◽  
Gas Distribution ◽  
Surface Rupture ◽  
Surface Rupture Zone

scholarly journals Estimation of the Rupture History of the 2008 Mw8.0 Wenchuan Earthquake by Joint Inversion of Teleseismic and Strong-Motion Records

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Deyu Yin ◽  
Yun Dong ◽  
Qifang Liu ◽  
Yuexin She ◽  
Jingke Wu ◽  
...  
Keyword(s):  
Wenchuan Earthquake ◽  
Strong Motion ◽  
Inversion Method ◽  
Near Surface ◽  
Strong Motion Records ◽  
The Wenchuan Earthquake ◽  
Finite Fault ◽  
History Of ◽  
Beichuan Fault ◽  
Dip Angle

In order to reproduce the rupture history of the 2008 Mw8.0 Wenchuan earthquake, the teleseismic and strong-motion records are adopted. Based on a multiple-segment, variable-slip model, the finite fault inversion method is utilized to recover the rupture process. The results are as follows: (1) the rupture duration of the Wenchuan earthquake is about 100 s, and the released seismic moment is 1.24 × 1021 N·m, equal to the moment magnitude Mw8.0. There are 5 asperities on the fault plane, indicating that the earthquake is composed of at least 5 subevents. (2) The slip is mainly distributed on the Beichuan fault, indicating that the Beichuan fault is the main rupture fault. On the southern part of the Beichuan fault, the dislocation underside the Longmenshan area and Hongkou-Yingxiu near-surface area is dominated by thrust, and the maximum slip is 11.8 m. Slip between the Yuejiashan and Qingping area is dominated by thrust. On the northern part of the Beichuan fault, the area under Beichuan is dominated by thrust, the slip under Nanba is thrust and strike, near Qingchuan, the slip turns into the strike slip, and the maximum slip is 13.1 m. The dislocation under Bailu is also dominated by thrust, with maximum slip 8.9 m. (3) The rupture of the Wenchuan earthquake is mainly a unilateral rupture to the northeast. The rupture started at the low dip angle part of the Beichuan fault, and after 3 s, it propagated to the Pengguan fault. After 10 s, the largest asperity under Longmenshan in the south section of the Beichuan fault began to break, lasting for about 24 s. Then, the Xiaoyudong fault was triggered by the Pengguan fault, and the bilateral rupture of the high dip angle part of the Beichuan fault started at about 6 s. South section of the Beichuan fault began to break at about 35 s, and at 43 s, 63 s, and 80 s, the rupture extended to Beichuan, Nanba, and Qingchuan areas.

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