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本文详细描述了曲江断裂的几何特征,指出该断裂带由12条互相独立的断层雁列构成。其雁列形式有左阶和右阶雁列两种,在左阶雁列区出现局部地面挤压抬升现象;在右阶雁列区出现断层塘和其它形式的地面沉降现象。 根据组成该断裂的断层之间的雁列比值大小,将整个断裂带分为西北、东南和中间三段。这三段断裂具有各自的特点,表现出不同的地震活动性和不同的地表破裂特征。文中指出,基于详细的断裂几何研究能够提供准确的断裂分带依据,有利于评价断裂带不同段的地震危险性和予测地震烈度分布。
This paper describes the geometric characteristics of the Qujiang fault in detail, and points out that the fault zone consists of 12 mutually independent fault geese. There are two kinds of geese in the form of left order and right order geese. In the left order geese, local surface elevation phenomenon occurs; in the right order, fault ponds and other forms of land subsidence occur. The whole fault zone is divided into three sections: northwest, southeast and middle according to the geese ratio between the faults that make up the fault. These three faults have their own characteristics, showing different seismic activities and different surface rupture characteristics. It is pointed out in this paper that based on the detailed fracture geometry research, accurate fracture zonation can be provided, which can be used to evaluate the seismic hazard of different sections of the fault zone and the distribution of seismic intensity to be predicted.