Insight into Urban Faults by Wavelet Multi-Scale Analysis and Modeling of Gravity Data in Shenzhen, China

Chuang Xu; Haihong Wang; Zhicai Luo; Hualiang Liu; Xiangdong Liu

doi:10.1007/s12583-017-0770-4

Volume 29 Issue 6

Nov 2018

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Journal of Earth Science > 2018 > 29(6): 1340-1348.

Chuang Xu, Haihong Wang, Zhicai Luo, Hualiang Liu, Xiangdong Liu. Insight into Urban Faults by Wavelet Multi-Scale Analysis and Modeling of Gravity Data in Shenzhen, China. Journal of Earth Science, 2018, 29(6): 1340-1348. doi: 10.1007/s12583-017-0770-4

Citation:

Chuang Xu, Haihong Wang, Zhicai Luo, Hualiang Liu, Xiangdong Liu. Insight into Urban Faults by Wavelet Multi-Scale Analysis and Modeling of Gravity Data in Shenzhen, China. Journal of Earth Science, 2018, 29(6): 1340-1348. doi: 10.1007/s12583-017-0770-4

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Insight into Urban Faults by Wavelet Multi-Scale Analysis and Modeling of Gravity Data in Shenzhen, China

doi: 10.1007/s12583-017-0770-4

1.
MOE Key Laboratory of Fundamental Physical Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
2.
School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China
3.
Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University, Wuhan 430079, China
4.
China Water Resources Beifang Investigation, Design and Research Co. Ltd., Tianjin 300222, China

Funds:

the National Natural Science Foundation of China 41504015

China Postdoctoral Science Foundation 2015M572146

the National Natural Science Foundation of China 41429401

the Surveying and Mapping Basic Research Program of National Administration of Surveying, Mapping and Geoinformation 15-01-08

the National 973 Project of China 2013CB733302

the National High Technology Research and Development Program of China 2011AA060503

More Information

Corresponding author: Haihong Wang
Received Date: 15 Jan 2016
Accepted Date: 09 May 2016
Publish Date: 01 Dec 2018

Abstract

Abstract

Urban faults in Shenzhen are potential threats to city security and sustainable development. In consideration of the importance of the Shenzhen fault zone, the author provide a detailed interpretation on gravity data model. Bouguer gravity covering the whole Shenzhen City was calculated with a 1-km resolution. Wavelet multi-scale analysis (MSA) was applied to the Bouguer gravity data to obtain the multilayer residual anomalies corresponding to different depths. In addition, 2D gravity models were constructed along three profiles. The Bouguer gravity anomaly shows an NE-striking high-low-high pattern from northwest to southeast, strongly related to the main faults. According to the results of MSA, the correlation between gravity anomaly and faults is particularly significant from 4 to 12 km depth. The residual gravity with small amplitude in each layer indicates weak tectonic activity in the crust. In the upper layers, positive anomalies along most of faults reveal the upwelling of high-density materials during the past tectonic movements. The multilayer residual anomalies also yield important information about the faults, such as the vertical extension and the dip direction. The maximum depth of the faults is about 20 km. In general, NE-striking faults extend deeper than NW-striking faults and have a larger dip angle.
- urban faults,
- Bouguer gravity anomaly,
- wavelet multi-scale analysis,
- gravity modeling,
- Shenzhen

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References(43)

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Insight into Urban Faults by Wavelet Multi-Scale Analysis and Modeling of Gravity Data in Shenzhen, China

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