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Analysis of present tectonic stress and regional ground fissure formation mechanism of the Weihe Basin

Lookup NU author(s): Professor Zhenhong Li

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Abstract

In this paper, the crustal horizontal velocity fields of the Weihe Basin and the Xi'an area are determined using high-precision GPS campaign measurements, which in turn provide constraints to calculate tectonic stress fields. A finite element dynamic model is employed for the Weihe Basin and an elastic block model for the Xi'an area. It is suggested that the ground fissures in the Weihe Basin are shaped by active faults under the effect of a NW-SE regional tension stress field. Fault motion is the fundamental factor influencing the ground fissures and controls their directions and distribution, though the excessive extraction of underground water might be another major factor that accelerates the development of ground fissures. It is believed the results obtained in this study can provide important information for the prevention of basin ground fissure disasters and aid urban construction.

Publication metadata

Author(s): Zhang Q, Qu W, Wang Q, Peng J, Drummond J, Li Z, Lin Q

Publication type: Article

Publication status: Published

Journal: Survey Review

Year: 2011

Volume: 43

Issue: 322

Pages: 382-389

Print publication date: 01/09/2011

ISSN (print): 0039-6265

ISSN (electronic): 1752-2706

Publisher: Maney Publishing

URL: http://dx.doi.org/10.1179/003962611X13055561708740

DOI: 10.1179/003962611X13055561708740

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