论文部分内容阅读
本文以1981年道孚6.9级地震考察资料为基础,结合1973年炉霍地震资料并运用光弹,泥料实验,讨论了鲜水河断裂上反“多”字型地裂缝带的成因机制。笔者认为反“多”字型地裂缝是断层水平剪切运动的产物,出现与相邻两条羽列裂缝交替部位的鼓包是裂缝水平错动在垂直方向调整作用的结果。鼓包两翼往往东陡西缓,鼓包轴部的逆断层也往往由西向东逆掩,这可能与断裂南西侧向南东运动有关,是以滇菱形断块向南南东运动产生的结果。
Based on the investigation data of the Daofude M 6.9 earthquake in 1981, combining with the data of furnace-fire and earthquake in 1973 and using the photoelastic and clay experiments, the paper discussed the genesis mechanism of the anti-“many” fissure zone on the Xianshuihe fault. The author thinks that the anti-“multi” fissure is the product of the horizontal shear movement of the fault. The drumbeat that appears in the alternate parts of two adjacent fractures is the result of vertical adjustment of the fracture. The two wings of the drum are usually steeply eastward and eastward. The thrust fault of the drum shaft also tends to be overturned from west to east. This may be related to the south-west movement of the fault and the south-east movement of the Yunnan diamond-shaped fault.