The Longmenshan Xie Store Seismites Development Characteristics And Its Controlling Factors

There had been a serious earthquake in mountain area where is near Yingxiu town in Western Sichuan Province of China at 2:28 p.m on May 12,2008. The earthquake magnitude is about 8.0. Violent shake caused huge economic losses and casualties. Also, a lot of basic and public facilities were destroyed. Wenchuan Earthquake made us realize profoundly that we must pay more attention to the geological disaster research when we studied active fault belt of Longmen Mountain and the stability of earth crust. In the process of reconstruction of the disaster area, geological disaster is problem which is needed to be solved eagerly. As a result of the severe situation of disaster mitigation, we must pay more attention to mechanism research and prevention research of landside and collapse. Wenchuan Earthquake bought great disaster for us and created an opportunity for earthquake science research. Meantime, it provided data for the crustal stress function research to the forming and distribution of reservoir.Based on the region geological study and fundamental geology research. aiming at Xiejiadianzi village in Longmenshan town of Pengzhou city, the paper describes geological disaster characteristic of rock mass which is formed by seismic deposition and does some research about basic geology and earth dynamics. According to the geological background of region, geographical environment, data of geological survey and research findings,the paper analyses type and characteristic of geological disaster,presents basic concept and theory of rock mass which formed by seismic deposition, explains growing process and characteristic of it, reveals evoked mechanism and control factor of it. Then, the important meaning of rock mass which formed by seismic deposition on science of geological disaster and geology is discussed. The concrete study is given as follows:(1) Growing process and the analysis of its characteristic. According to the growing process of geological disaster, growing characteristic of geological disaster, the data of geological survey, growing process and characteristic are explained.Generally speaking, landslide-debris flow is divided three sections:①sart section,②planed erosion section,③accumulation section; three Body:①impact body,②plane corrosion body,③accumulation body.And detritus from the integrated seismic lithology,structural characteristics, structure and color characteristics of clastic material, and the relationship between oil and gas analysis in such areas.The reservoir quality of the fourth section is good and it can be good place for preserving oil and gas. The phenomenon of rock mass which formed by seismic deposition reveals that crustal stress has influences on forming mechanism and distribution rule of reservoir. It has strong relation with deep fracture and there is good way of oil and gas migration in it.(2) Type and characteristic of geological disaster. According to the type and characteristic of geological disaster, the paper introduces growing feature and forming rule of collapse, landslide, debris flow, mud and stone flow, seismite. The concept of rock mass which formed by seismic deposition is proposed by analysis. (3) Evoked mechanism and control factor when growing. By analysis of earthquake dynamics, architectonic geology, terrain and geomorphy, rock source, the paper reveals reasons of growing and control factor of growing. Based on earthquake rupture initiation point at latitude of about 31.1°, longitude of about 103.3°, the Longmen Shan fault zone on a range of points of latitude 31°00'N-31°50'N, longitude range 103°29'E-104°45'E, strong force in the latitude in the northern hemisphere, southern hemisphere's role in the range of latitude 21°33'-68°27', latitude 21°33'-68°27'. thus determined, the Longmen Shan fault zone by obvious strong force in the weft. Strong mid-latitude force on the fault zone, as the activities of the Longmen Shan fault zone to power。(4) Discuss its meaning of geology. According to the dynamics of earthquake, geology, earthquake influence on geological disaster and mineral source distribution, the paper describes the meaning of rock mass which formed by seismic deposition in some research field, such as the prevention of geological disaster, accumulation and distribution of oil and gas.