关键词: 定量地貌学, 断裂作用, 第四纪, 山西

Abstract: Three basic geomorphic units, which were developed in response to the climate changes during the last glaciation, are recongnized along the northern piedmont of the ENE-trending Liulengshan range from airphoto interpretations and field observations.These three units are the inter-stadial fluvial fan (S₃) about 23～53 ka old, the maximum-glacial fluvial fan(S₂) about 10～23 ka old and the post-glacial fluvial fan(S₁) about 1～10 ka old, respectively.Five fluvial terraces(T₀～T₄) were also developed owing to the climatic temperature fluctuations on thousandyear scale.These geomorphic units(S₁～S₃) and fluvial terraces(T₀～T₄) are chronometrically dated by thermoluminescence.Stripped geomorphic mapping shows a natural segmentation in offset-geomorphology along the norhern piedmont fault of Liulengshan range.Six segments can be divided in the mapping areas and they are the Xifutou, Donghouzikou-Dawangcun, Xitunpu-Qiulin, Huoshilin-Qiuchangcheng, Huajialing-Xiejiayao and Longmazhuang-Xinpu segments from the west to the east, respectively.A set of quantitative data (faulting ages, vertical displacements and slip rates) are obtained from long-distance topographic profiles across the offset geomorphic units or fuvial terraces.The average Holocene vertical slip rates are 0.43～0.48mm/a for the Donghouzikou-Dawangcun segment, a bout 0.45 mm /a for t he Xitunpn-Qiulin segment, and 0.53～0.55mm/a for the Longmazhuang-Xinpu segment.The faulting irregularity is demonstrated by temproal and spatial flucturation in vertical slip rates during the Late Quaternary.The period of 15.6～7.6ha B P is the main phase of intensely verical faulting along the northern piedmont of Liulengshan range.

Key words: uantitative geomorphology, Fracturing, Quaternary, Shanxi