Abstract
Longmen Shan is located the special joint between the Qinghai-Tibetan Plateau in the west and the Yangtze craton in the east. Consisting of a series of parallel imbricated thrust, it develops, from the west to the east, the Maoxian-Wenchuan, Yingxiu-Beichuan and Pengxian-Guanxian faults. Wenchuan Ms 8.0 earthquake is a thrust with strike-slip type, and surface ruptures are located in Yingxiu-Beichuan fault zone and Peng- xian-Guanxian fault zone. Based on the geological background, tectonic setting, the active tectonics of Long- men Shan and surface ruptures of the Wenchuan earthquake, a dynamical model to illustrate possible links between surface processes and upward extrusion of lower crustal flow channel at the eastern margin of the Tibetan plateau have been studied, and the results is the material in lower crust in the Longmen Shan moving as nearly-vertical extrusion and uplift, resulting in the surface rate of tectonic movement differing according to depth rate as well as the occurrence of large shallow Wenchuan earthquake.
Highlights
The Ms 8.0 Wenchuan Earthquake in May 12th, 2008 is one of the most disastrous earthquakes since the foundation of P
Based on the geological background, tectonic setting, the active tectonics of Longmen Shan and surface ruptures of the Wenchuan earthquake, a dynamical model to illustrate possible links between surface processes and upward extrusion of lower crustal flow channel at the eastern margin of the Tibetan plateau have been studied, and the results is the material in lower crust in the Longmen Shan moving as nearly-vertical extrusion and uplift, resulting in the surface rate of tectonic movement differing according to depth rate as well as the occurrence of large shallow Wenchuan earthquake
The active tectonics and Wenchuan earthquake show the Longmen Shan fault is characterize by thrust and dextral strike-slip movement, which does not coincide with England and Molnar’s large scale dextral shear movement in the eastern margin of Qinghai-Tibetan Plateau, and which does not coincide with Avouac and Tapponnier [20] eastward thrusting mode in the eastern margin of the Qinghai-Tibetan Plateau
Summary
The Ms 8.0 Wenchuan Earthquake in May 12th, 2008 is one of the most disastrous earthquakes since the foundation of P. R. China, which destroyed the epicenter of Sichuan province and several closed provinces. China, which destroyed the epicenter of Sichuan province and several closed provinces It was felt in most regions of China, as well as nations outside China. This tragic event provides the opportunity to advance the subject of seismic sciences. This paper compiles 70 sets of data from accumulated past and new surveys, detailing surface rupture and seismic disasters since our work began in the 1990s [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15].
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