3-D Joint Inversion of DC Resistivity and Time-Domain Induced Polarization With Structural Constraints in Undulating Topography

Addressing the significant impact of undulating terrain on 3-D direct current (dc) inversion, the unreliability of traditional linearized polarizability inversion for highly polarizable anomalies, and the nonuniqueness of separate resistivity and time-domain-induced polarization (TDIP) inversion, th...

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Veröffentlicht in:IEEE transactions on geoscience and remote sensing Jg. 61; S. 1 - 12
Hauptverfasser: Yang, Hetian, Li, Tonglin, Zhang, Rongzhe, Dong, Xintong, Zhuang, Yan
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York IEEE 2023
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
3-D
Algorithms
Anomalies
Conductivity
Constraints
Direct current
Electrical resistivity
Finite element analysis
Finite element method
Induced polarization
Jacobian matrices
joint inversion
Mathematical models
Mountains
Polarizability
Polarization
resistivity
Solid modeling
Synthetic data
Terrain
Three-dimensional displays
Time domain analysis
time-domain-induced polarization (TDIP)
Topography
Zinc
ISSN:0196-2892, 1558-0644
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Zusammenfassung:Addressing the significant impact of undulating terrain on 3-D direct current (dc) inversion, the unreliability of traditional linearized polarizability inversion for highly polarizable anomalies, and the nonuniqueness of separate resistivity and time-domain-induced polarization (TDIP) inversion, this article conducts a joint inversion study of 3-D dc resistivity and TDIP with structural constraints in undulating topography. A regularly arranged deformed hexahedron mesh simulates undulating surface terrain, transformed into regular hexahedron elements for 3-D undulating terrain dc resistivity modeling. Based on the exact inversion of polarization calculated from the inversion results of apparent resistivity and equivalent apparent resistivity data, a joint inversion of resistivity and polarization constrained by cross-gradient is implemented. Synthetic data examples show that the application of arbitrary hexahedron elements significantly reduces the influence of terrain on inversion, and the implementation of joint inversion markedly improves the recovery of high-polarization anomalies while enhancing both the model resolution and the inversion accuracy. The proposed algorithm is applied to the joint inversion of resistivity and polarizability in the lead-zinc mining area of Xiagalaiaoyi River in Huzhong area, the Great Khingan Mountains, and Northwestern Heilongjiang Province, achieving good results.
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ISSN:0196-2892
1558-0644
DOI:10.1109/TGRS.2023.3321614