摘要
甘肃文县北部北东东向断裂带主要由松柏—何家坝—犁坪断裂东段、石鸡坝—观音坝断裂和石坊—临江断裂组成。运用地貌学原理和卫片判读,描述了该断裂带的新构造运动表现、运动方式。结果表明:(1)断裂带的新构造活动主要表现为左旋倾滑,水平活动规模较大;(2)石坊—临江断裂为两个明显的线性构造线,沿山脊横贯近东西向,线性构造线两侧冲沟及山脊被错,断裂呈现左旋走滑特点。在分析该断裂带地貌特征的基础上,初步探讨了地震与断层活动性的关系。
The NEE-striking fault belt north of Wen County, Gansu, includes the east part of the Songbo-Hejiaping- Liping fault, Shjiba-Guanyinba fault and Shifang-Linjiang fault. We study their Neotectonic behaviors and motion patterns according to geomorphologic principle and satellite photograph explanation. The results show： （1） the Neotectonic activity of the belt is mainly left-lateral dip-slip, the scale of whose level activity is big; （2） the Shifang-Linjiang fault consists of two obvious linearity tectonics-lines parallel to the ridge along near-EW, the gullies of both sides of which and the ridge are offset, and the fault shows left-lateral strike-slip characteristic. On the basis of the geomorphic analysis of the belt, we primarily discuss the relation between earthquake and fault activity.
出处
《地震研究》
CSCD
北大核心
2006年第2期143-146,共4页
Journal of Seismological Research
关键词
斜列式断裂带
新构造活动
左旋倾滑
卫片
diagonal fault belt, Neotectonic activity, left-lateral dip-slip, satellite photograph
