本文通过遥感解译、地质考察、探槽开挖、剖面研判、地质测年、构造类比等方

Based on remote sensing interpretation, geological survey, trench excavation, profile research, geological dating, structural analogy, etc., this paper concludes that the linear characteristics of remote sensing images in the front of the Amuni Mountain are obvious, and there are suspected surface ruptures and faults about 30km in length. Mistake alluvial fans and terraces of different periods. Geological investigations revealed that there are earthquake rupture relics such as fault ridges, fault grooves, seismic drum beams, and water system twists along the fault line. There is a surface rupture with a strike of 120°-130°, a coseismic displacement of 2.3m and a length of about 20km. Through trench excavation, combined with surface relics, it is judged that the nature of the fault is mainly strike-slip, supplemented by thrust. The section reveals multiple faults, which are obviously faulted to the surface, forming the characteristics of multi-phase activities. Based on the empirical statistical relationship between magnitude and surface rupture, and the empirical relationship between strike-slip fault and rupture length, it is calculated that the length of the surface rupture formed by the magnitude 6.8 earthquake is about 24.4km, and the coseismic displacement is 2.0m. The rupture length and coseismic displacement of this section Fully comply with the empirical statistical relationship and experience value. Comprehensive seismic geological survey results, seismic geological disasters and other data, it is confirmed that the macro epicenter is located in front of the Amuni Mountain in the northeast of North Hobson Lake, and its geographic coordinates are: 36.89°N, 96.61°E, which is 50km away from the micro epicenter. The seismogenic fault is the Amunicshan section of the northern margin of the Qaidam Basin.

In this paper, through remote sensing interpretation, geological investigation, exploration channel excavation, cross-sectional study, geological dating, tectonic analogy and other methods of research that: in front of The Amunik Mountain remote sensing image linear features are obvious, there is a suspected length of about 30 km of surface rupture, fracture fault fault in different periods of flood fan and ground. The geological survey found that the seismic rupture remains of the developed faults along the fault line, fault grooves, seismic drum beams, water system twists and turns, etc., existed a surface rupture with a direction of 120 degrees-130 degrees, the same seismic displacement of 2.3m, and about 20 km long. Through the excavation of the exploration channel, combined with the surface remains, to judge the nature of the fault to slip mainly, reverse flush as a supplement, the profile revealed a number of faults, and obviously broken to the surface, forming the characteristics of multi-phase activities. Through the empirical statistical relationship between magnitude and surface rupture, the empirical relationship between slip fault and rupture length, the surface rupture length formed by the 6.8 magnitude earthquake is calculated to be about 24.4 km, and the same seismic displacement of 2.0m, the length of the rupture and the same seismic displacement are fully in line with the empirical statistical relationship and empirical value. Comprehensive seismic geological survey results, seismic geological disasters and other data, confirmed that the macro epicenter is located in the north-east of North Hobson Lake in front of The Amunik Mountain, its geographical coordinates are: 36.89 degrees N, 96.61 degrees E, with the micro-epicenter of 50 km deviation, the earthquake fracture is the northern edge of the Chaidamu Basin fracture amunik mountain section.

Through remote sensing interpretation, geological investigation, trench excavation, profile study and judgment, geological dating and structural analogy, this paper considers that the linear characteristics of remote sensing images in the front of amunik mountain are obvious, and there is a suspected surface rupture of about 30 km long, and there are alluvial fans and terraces with different fault dislocations. Geological investigation found that along the fault developed fault scarps, fault grooves, seismic drum beam, water system twist and other seismic rupture traces, there is a strike of 120 ° to 130 ° with coseismic displacement of 2.3 m, about 20 km long surface rupture. Through trench excavation, combined with the surface relics, it is judged that the fault nature is mainly strike slip, supplemented by thrust. The profile reveals multiple faults, which are obviously staggered to the surface, forming the characteristics of multi-stage activities. According to the empirical statistical relationship between magnitude and surface rupture and the empirical relationship between strike slip fault and rupture length, the length of surface rupture caused by the Ms6.8 earthquake is about 24.4km, and the coseismic displacement is 2.0m. The rupture length and coseismic displacement of this segment fully conform to the empirical statistical relationship and empirical values. The macro epicenter is located in the front of amunik mountain in the northeast of North Hobson lake. Its geographical coordinates are 36.89 ° N and 96.61 ° e, which is 50km away from the micro epicenter. The seismogenic fault is the amunik mountain segment of the northern margin of Qaidam Basin.