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Applied Geophysics

, Volume 15, Issue 3–4, pp 524–535 | Cite as

Three-dimensional gravity inversion based on sparse recovery iteration using approximate zero norm

  • Zhao-Hai MengEmail author
  • Xue-Chun Xu
  • Da-Nian Huang
Article
  • 12 Downloads

Abstract

This research proposes a novel three-dimensional gravity inversion based on sparse recovery in compress sensing. Zero norm is selected as the objective function, which is then iteratively solved by the approximate zero norm solution. The inversion approach mainly employs forward modeling; a depth weight function is introduced into the objective function of the zero norms. Sparse inversion results are obtained by the corresponding optimal mathematical method. To achieve the practical geophysical and geological significance of the results, penalty function is applied to constrain the density values. Results obtained by proposed provide clear boundary depth and density contrast distribution information. The method’s accuracy, validity, and reliability are verified by comparing its results with those of synthetic models. To further explain its reliability, a practical gravity data is obtained for a region in Texas, USA is applied. Inversion results for this region are compared with those of previous studies, including a research of logging data in the same area. The depth of salt dome obtained by the inversion method is 4.2 km, which is in good agreement with the 4.4 km value from the logging data. From this, the practicality of the inversion method is also validated.

Keywords

Three-dimensional gravity inversion sparse recovery approximate zero norm iterative method density constraint penalty function 

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Notes

Acknowledgements

The authors would like to thank reviewers Profs. Yao Changli, Jiang Puyu, and Luo Zhicai for their valuable comments and suggestions for the final paper, and also would like to extend their sincere thanks to Li Fengting, Geng Meixia, Qin Pengbo, et al. for the support of this research.

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Copyright information

© Editorial Office of Applied Geophysics and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Tianjin Navigation Instrument Research InstituteTianjinChina
  2. 2.College of Earth SciencesJilin UniversityChangchunChina
  3. 3.College of Instrumentation and Electrical EngineeringJilin UniversityChangchunChina
  4. 4.Key Laboratory of Petroleum Resources ResearchInstitute of Geology and Geophysics, Chinese Academy of SciencesBeijingChina

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