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Numerical simulation of the mechanics of formation of a parallel reverse fault

  • Hujun HeEmail author
  • Shengrui Su
  • Hai Mei
  • Peng Li
Original Paper
  • 26 Downloads

Abstract

The significance of the fault-formation mechanism and its relation to earthquakes are discussed, with attention paid to prior fieldwork and analytical results. This paper uses MIDAS/GTS numerical software to simulate the formation mechanism of the newly formed NW-trending Xiaoyudong Fault. The generation of the Xiaoyudong Fault was closely related to the stress distribution on the Beichuan-Yingxiu Fault (i.e., Longmenshan Central Fault) and the Anxian-Guanxian Fault (i.e., Longmenshan Qianshan Fault). The stress and displacement on the Central Fault are significantly greater than those on the Qianshan Fault, and the Central Fault had a greater effect on the Xiaoyudong Fault than did the Longmenshan Qianshan Fault. The stress gradient, displacement, and influence range gradually decrease with increasing depth, with greater rates of change occurring at < 4-km depth than at greater depths.

Keywords

New fault Mechanics Numerical simulation MIDAS/GTS 

Notes

Acknowledgments

We thank our many supervisors and colleagues who helped this paper reach publication, and gratefully acknowledge the thorough and constructive feedback provided by the editor and the anonymous reviewer.

Funding information

This work was financially supported by the major program of the National Natural Science Foundation of China (41030749 and 41072223), the geological survey projects of the Geological Survey Bureau of China (1212010914205), the Special Fund for Basic Scientific Research of Central Colleges (310827173702), and the open fund for State Key Laboratory of Water Resources Protection and Utilization in Coal Mining (SHJT-16-30.19).

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Copyright information

© Saudi Society for Geosciences 2019

Authors and Affiliations

  1. 1.School of Earth Science and ResourcesChang’an UniversityXi’anChina
  2. 2.Key Laboratory of Western Mineral Resources and Geological EngineeringMinistry of EducationXi’anChina
  3. 3.State Key Laboratory of Water Resource Protection and Utilization in Coal MiningShenhua Group Co., LtdBeijingChina
  4. 4.School of Geology Engineering and GeomaticsChang’an UniversityXi’anChina

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