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A Preliminary Study on a Seismotectonic Model for the Active Faults in the Xining Urban Area

Tian Qinjian Li Zhimin Zhang Junlong Ren Zhikun

中国地震研究(英文版)2008,Vol.22Issue(1):15-23,9.
中国地震研究(英文版)2008,Vol.22Issue(1):15-23,9.

A Preliminary Study on a Seismotectonic Model for the Active Faults in the Xining Urban Area

A Preliminary Study on a Seismotectonic Model for the Active Faults in the Xining Urban Area

Tian Qinjian 1Li Zhimin 2Zhang Junlong 3Ren Zhikun3

作者信息

  • 1. China Earthquake Disaster Prevention Center, Beijing 100029, China
  • 2. Earthquake Administration of Qinghai Province, Xining 810001, China
  • 3. Institute of Earthquake Science. CEA, Beijing 100036,China
  • 折叠

摘要

Abstract

On the basis of the Xining active urban fault survey, we studied the relationship between the active urban fault and fold deformation. The result of this research shows that the Hnangshuihe fault and the NW-striking fault on the northern bank of the Huangshuibe River are tensional faults on top of an anticline, the Nanchuanhe fault is a transverse tear fault resulting from differential folding on two sides of the fault, the east bank of the Beichuanhe River fault is a compressional fault developed on the core or climb of a syncline. By balance profile analysis of fold deformation and inversion of gravity anomaly data, we obtained the depth of the detachment plane and established the seismotectonic model of the Xining urban area. Based on the seismotectonic model, we analyzed the earthquake potential of the active urban fault.

关键词

Urban active fault/ Weak active fault/ Seismotectonic model/ Earthquake risk/ Xining

Key words

Urban active fault/ Weak active fault/ Seismotectonic model/ Earthquake risk/ Xining

分类

天文与地球科学

引用本文复制引用

Tian Qinjian ,Li Zhimin ,Zhang Junlong ,Ren Zhikun..A Preliminary Study on a Seismotectonic Model for the Active Faults in the Xining Urban Area[J].中国地震研究(英文版),2008,22(1):15-23,9.

基金项目

This project was sponsored by National Development and Reform Commission (NDRC) on studies of experimental exploration of active fault in urban area (20041138). (NDRC)

中国地震研究(英文版)

2096-9996

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