SEISMOLOGY AND GEOLOGY ›› 1996, Vol. 18 ›› Issue (2): 169-181.

• Brief Report • Previous Articles     Next Articles

GEOMORPHIC STUDY ON LATE QUATERNARY IRREGULAR FAULTING ALONG THE NORTHERN PIEDMONT OF LIULENGSHAN RANGE, SHANXI PROVINCE, CHINA

Xu Xiwei1, Yonekura Nobuyuki2, Suzuki Yasuhiro3, Deng Qidong1, Wang Yipeng1, Takeuci Akira4, Wang Cunyu5   

  1. 1. Institute of Geology, SSB, Beijing 100029, China;
    2. Dept. of Geography, Graduate School of Science, University of Tokyo, Tokyo 113, Japan;
    3. Laboratory of Geosciences, Aichi Prefectural University, 467, Japan;
    4. Dept. of Geology, Toyama University, Toyama 930, Japan;
    5. Institute of Geology, Academia Beijing 100029, China
  • Received:1995-08-31 Revised:1995-12-31 Online:1996-06-05 Published:2009-11-25

山西六棱山北麓晚第四纪不规则断裂作用的地貌学研究

徐锡伟1, 米仓伸之2, 铃太康弘3, 邓起东1, 汪一鹏1, 王存玉4, 竹内章5   

  1. 1. 国家地震局地质研究所, 北京 100029;
    2. 东京大学理学部地理系, 东京 113;
    3. 日本爱知县立大学地球科学实验室, 名古屋 167;
    4. 中国科学院地质研究所, 北京 100029;
    5. 日本富山大学地质系, 富山 930
  • 基金资助:
    地震科学联合基金(95103);日本文部省科学基金(05041054)

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

摘要: 利用航片判读和野外核查相结合的途径确定了六棱山北麓晚第四纪时期的基本地貌单元及其形成时代,研究了六棱山北麓断裂的地貌学和构造学分段性特征,通过对断错地貌面的地形剖面的高精度实测,获得了表征六棱山北麓断裂作用时空不规则性的定量资料──晚第四纪断层滑动速率随时间的涨落特性,指出距今1.56~0.76万a时段是六棱山北麓断裂作用的强烈活跃期。

关键词: 定量地貌学, 断裂作用, 第四纪, 山西