Tectonic Stress Field of the Weihe Basin Using the Finite Element Method

QU Wei; WANG Yunsheng; XU Chao; ZHANG Qin; WANG Qingliang

doi:10.13203/j.whugis20150574

Volume 42 Issue 12

Dec. 2017

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Geomatics and Information Science of Wuhan University > 2017 > 42(12): 1749-1755. > DOI: 10.13203/j.whugis20150574

QU Wei, WANG Yunsheng, XU Chao, ZHANG Qin, WANG Qingliang. Tectonic Stress Field of the Weihe Basin Using the Finite Element Method[J]. Geomatics and Information Science of Wuhan University, 2017, 42(12): 1749-1755. DOI: 10.13203/j.whugis20150574

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Tectonic Stress Field of the Weihe Basin Using the Finite Element Method

1.
College of Geology Engineering and Geomatics, Chang'an Uiversity, Xi'an 710054, China
2.
State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
3.
Second Monitoring and Application Center, China Earthquake Administration, Xi'an 710054, China

Funds:

The National Natural Science Foundation of China 41674001

The National Natural Science Foundation of China 41504005

The National Natural Science Foundation of China 41202189

The National Natural Science Foundation of China 41274005

The National Natural Science Foundation of China 41274004

Natural Science Basic Research Plan in Shannxi Province of China 2016JM4005

the Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology) SKLGP2014K009

China Postdoctoral Science Foundation 2013M530412

the Special Fund for Basic Scientific Research of Central Colleges 2014G1261050

the Special Fund for Basic Scientific Research of Central Colleges 2014G3263014

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Author Bio:
QU Wei, PhD, associate professor, specializes in geodesy and crustal deformation. E-mail: maikerqq@163.com
Received Date: January 17, 2016
Published Date: December 04, 2017

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Abstract

Abstract

Based on the tectonic and the deep geological strata structure of the Weihe Basin, the three-dimensional (3D) finite element dynamic model was established by using the high-precision GPS monitoring data as boundary conditions. We further compared the movement property of faults and focal tectonic stress field simulated by the 3D model with the geological survey results and focal mechanism. The results of numerical simulation detailed reveal that the Longxian-Mazhao and Hancheng-Huaxian faults are the obvious difference boundaries of the tectonic stress field. The middle part where between the two faults is the concentration zone of tensile stress in the NW-SE direction, on the west side of the Longxian-Mazhao fault presents significant compression stress in the E-W direction, while on the east side of the Hancheng-Huaxian fault mainly presents compression stress in the NE-SW direction. The Pucheng-Liquan-Heyang fault is also the obvious difference boundaries divided the tectonic stress field of the middle part of Weihe Basin into two parts. The south side shows more significant tensile stress in the NW-SE direction compared with the north side of this fault. That may be the tectonic dynamic mechanism for the ground fissure more developed in the south side than the north side.
- GPS,
- Weihe Basin,
- three-dimensional finite element model,
- tectonic stress field,
- numerical simulation,
- ground fissures

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References

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