【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。更多还原

【Abstract】 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.更多还原