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Analysis of Geological Background of Seismic Activity in the Chengdu Plain from Data of Seismic Prospecting for Oil

Huang Shenmu He Tianhua Fan Mingxiang Li Jiapen Xie Xiongfei Feng Hedi Wu Zhishen

中国地震研究（英文版）2004，Vol.18Issue(3)：300-316,17.
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中国地震研究（英文版）2004，Vol.18Issue(3)：300-316,17.

Analysis of Geological Background of Seismic Activity in the Chengdu Plain from Data of Seismic Prospecting for Oil

Analysis of Geological Background of Seismic Activity in the Chengdu Plain from Data of Seismic Prospecting for Oil

Huang Shenmu 1He Tianhua 2Fan Mingxiang 3Li Jiapen 4Xie Xiongfei 4Feng Hedi 5Wu Zhishen6

作者信息

  • 1. Earthquake Administration of Sichuan Province, Chendu 610041,China
  • 2. Institute for Geological Prospecting and Development, Sichuan Petroleum Administration, Chengdu 610081,China
  • 3. Chengdu Institute for Geophysical Prospecting, Sichuan Petroleum Administration, Chengdu 610212,China
  • 4. Second Geophysical Prospecting Team, Institute of Southwest Petroleum Administration, Xinxing Petroleum Company of Sino-Petroleum & Chemical Group, Deyang 618000,China
  • 5. Earthquake Administration of Chengdu City, Chengdu 610015,China
  • 6. Earthquake Administration of Deyang City, Deyang 618000,China
  • 折叠

摘要

Abstract

Summarizing the existing data of seismological and geological investigations ancl or strong and intermediate-strong earthquakes in the Sichuan basin and its adjacent areas accumulated by the seismological and petroleum organizations in Sichuan and of the results of seismic prospecting and detailed exploration in Chengdu depression during the last 20 years permitted ns to study the types and distribution of hidden structures in Chengdu depression and its adjacent areas, in particular, to identify in detail the "hidden faults" in the Chenngdu-Deyang area on the one hand; The obtained data indicate that the NE-trending Xinjin fault runs northward and dies out in the south of Penzhen town of Shuangiiu County. Meanwhile, we studied genetic relations of seismic activity to active faults and their corresponding movement characteristics on the other hand. Moreover, the surface faults and deep-seated faults are clearly defined and outlined,and 5 types of seismogenic faults suggested. The knowledge thus obtained enables us to delimit the focal zones for potential strong earthquakes in Chengdu depression. The study suggests that a zone of 40 km wide and more than 100 km long on sides along the Chengdu-Deyang line has a stable seismogeological background and good engineering-seismological conditions.

关键词

Chengdu plain/Shallow fault/Deep-seated fault/Decollement fault/Hidden basement fault/Through surface-basement fault/Earthquake activity

Key words

Chengdu plain/Shallow fault/Deep-seated fault/Decollement fault/Hidden basement fault/Through surface-basement fault/Earthquake activity

分类

天文与地球科学

引用本文复制引用

Huang Shenmu,He Tianhua,Fan Mingxiang,Li Jiapen,Xie Xiongfei,Feng Hedi,Wu Zhishen..Analysis of Geological Background of Seismic Activity in the Chengdu Plain from Data of Seismic Prospecting for Oil[J].中国地震研究（英文版）,2004,18(3):300-316,17.

基金项目

The research was supported under the State Key Basic Research and Development Program(95130505), China. （95130505）

中国地震研究（英文版）

2096-9996

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