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Acta Seismologica Sinica

, Volume 21, Issue 2, pp 156–169 | Cite as

Geometric structure and formation mechanism of Lintong-Chang’an fault zone

  • Ya-qin Shi (师亚芹)Email author
  • Xi-jie Feng (冯希杰)
  • Wang-qiang Dai (戴王强)
  • Xiao-ni Li (李晓妮)
  • Jun Ren (任隽)
  • Jin Chong (种瑾)
Article
  • 84 Downloads

Abstract

The results from investigation of large quantity of fault outcrops and artificial earthquakes suggest that the Lintong-Chang’an fault zone mainly consists of two faults. One is the Majie-Nianwan fault that separates a branch of Wangjiabian-Houjiawan fault on the right bank of the Bahe River; the other is the Hujiagou-Shoupazhang fault that separates a branch of Zhongdicun-Tangjiazhai fault in Tongrenyuan and Shaolingyuan. As tensional dip-slip normal faults, the faults distribute with approximately parallel equal intervals in local regions and the profiles drop in a step-like form to the northwest, presenting a Y-shape combination. The result from deep seismic reflection indicates that the fault is about 5∼8 km in depth, which is not only a basement fault, but also a listric normal fault in the deep stratum. The Lintong-Chang’an fault is a typical outstretching rift system under the NS-trending tension stress field. At the same time, affected by the sinistral strike slip of the Yuxia-Tieluzi fault, the fault extends like a broom from the northeast to the southwest.

Key words

Lintong-Chang’an fault tension stress outstretching rift system listric normal fault 

CLC number

P315.2 

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Copyright information

© Seismological Society of China and Springer-Verlag GmbH 2008

Authors and Affiliations

  • Ya-qin Shi (师亚芹)
    • 1
    Email author
  • Xi-jie Feng (冯希杰)
    • 1
  • Wang-qiang Dai (戴王强)
    • 1
  • Xiao-ni Li (李晓妮)
    • 1
  • Jun Ren (任隽)
    • 1
  • Jin Chong (种瑾)
    • 1
  1. 1.Earthquake Administration of Shaanxi ProvinceXi’anChina

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