论文部分内容阅读
断裂深部产状和空间几何关系是研究地壳运动变形、动力作用及其地表响应的基础,也是模拟发震断裂与强震关系的基础。为了研究川西南地区强震活动与安宁河、则木河和金河断裂的关系,对盐源-西昌-雷波高分辨地震折射剖面初至Pg波走时和断层面反射波走时进行模拟,获得了川滇活动地块东边界带安宁河、则木河和金河断裂的深部形态。结果表明:在上地壳内,安宁河断裂和则木河断裂东倾32°～35°,其速度结构为舌状低速带,二者规模较大,延伸到了基底。金河断裂东倾约30°,向下延伸至少5km。
The deep fault geometry and space geometry are the basis for studying crustal deformation, dynamic action and its surface response, as well as the basis for simulating the relationship between seismogenic faults and strong earthquakes. In order to study the relationship between the strong earthquakes in the area of southwestern Sichuan and the Anning and Zehe faults and the Jinhe fault, On the east boundary of Yunnan activity block, the Anning River is the deep shape of the Muhe and Jinhe faults. The results show that in the upper crust, the Anninghe fault and the Zemuhe fault have an eastward inclination of 32 ° ~ 35 °, and the velocity structure is a tongue-like low-velocity zone, both of which are large in size and extend to the basement. Gold River fault eastward tilt of about 30 °, extending down at least 5km.