榆木山北缘断裂的构造地貌特征与断层活动性

构造地貌能反映断裂的结构变形特征和断层的活动强度。便如断层陡坎的高度、长度和坡度以及断层陡坎的连续程度。在这篇文章中，讨论了断层段内每个段落断层陡坎的F（C），F（D），F（LR），F（SR）值的特征。在这篇文章结尾，还讨论了冲洪积扇特征对以活动强度的反映。从地貌统计结果来看，发现在榆木山断裂的中间部位冲洪积扇体坡度最大，从中间向两侧中洪积扇扇体坡度呈减弱趋势。文中还给出了断层陡无坎变形的测量结果，冲洪积扇扇顶热释光年龄和断层滑动速度。从分析结果来看，榆木山北缘断裂可以细分为三段，东段（梨园小口子－排路口）、中段（排路口－芦泉河）和西段（芦泉河－李家山子）。

The tectonic topography feature of the faults in north Yumushan Mountain and its faulting activity

Tectonic topography can reflect the structural deformation feature and active strength of faults,such as the height,length and gradient of a fault scarp as well as its continuity.In this paper,the reatures of F(C),F(D),F(LR),F(SR)value in each segment of a fault scarp are analyzed.At the end of this paper,we discussed the reflection of alluvial fan on the active strength of faults.From the statistic results of geomorphy,we find that the gradient of the alluvial fan in the middle part of Yumushan Mountain is the biggest,and gets smaller extending from the middle to the both side.The survey results of fault deformation as well as the thermoluminescent dating on the fan top and fault slip velocity are also given.The results show that the fault in north boundary of Yumushan Mountain can be divided into three segments:east segment,middle segment,and west segment.