2.5D induced polarization forward modeling using the adaptive finite-element method

Ye, Yi-Xin; Li, Yuguo; Deng, Juzhi; Li, Zelin

doi:10.1007/s11770-014-0455-z

Cited by 6 publications

(2 citation statements)

References 13 publications

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“…The equivalent conductivity method was used while the induced‐polarization was being modelled (Weller, Frangos and Seichter ; Ye et al . ). The equivalent conductivity is defined as

σ_{η} = σ false(1 - η false)

that contains induced‐polarization where η is the chargeability.…”

Section: Data Acquisition and Processingmentioning

confidence: 97%

Three‐dimensional electrical exploration methods for the mapping of polymetallic targets in Gansu Province, China

Gong

Yang²,

Lin³

et al. 2019

Geophysical Prospecting

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We describe a three‐dimensional electrical exploration system, and its use in carrying out a three‐dimensional survey on a polymetallic deposit located in China's Gansu Province. A time‐domain‐induced polarization method, along with a controlled‐source audiomagnetotelluric method, was used to survey the same station points for comparison. Then, a three‐dimensional inversion based on the incomplete Gauss–Newton method (for time‐domain‐induced polarization) and a nonlinear conjugate gradient (for controlled‐source audiomagnetotelluric) method were developed and applied in order to model the data sets. Four subsurface targets were mapped by the three‐dimensional electrical exploration method. A strong correlation was found between the zones of the revealed ore‐bearing anomalies and the geological setting. Using the results of the three‐dimensional electrical exploration, we revealed the spatial distribution of the ore‐bearing stratum, as well as the relationship between the ore bodies and the stratum. The results potentially provided evidence for future interpretations of deep geological structures, along with evaluations of mineral resources.

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“…The equivalent conductivity method was used while the induced‐polarization was being modelled (Weller, Frangos and Seichter ; Ye et al . ). The equivalent conductivity is defined as

σ_{η} = σ false(1 - η false)

that contains induced‐polarization where η is the chargeability.…”

Section: Data Acquisition and Processingmentioning

confidence: 97%

Three‐dimensional electrical exploration methods for the mapping of polymetallic targets in Gansu Province, China

Gong

Yang²,

Lin³

et al. 2019

Geophysical Prospecting

View full text Add to dashboard Cite

show abstract

“…Analysis by 2.5D forward modeling is based on the background/anomalous-filed algorithm. In order to eliminate the time and strike components, it is usually manipulated in the Laplace and Fourier domains and calculated using the finite element method (FEM) [21][22][23][24]. The inverse Laplace and Fourier transforms are used to recover the solution in the time domain.…”

Section: Introductionmentioning

confidence: 99%

Talbot Algorithm with a Trapezoidal Wave in the 2.5D Airborne Transient Electromagnetic Method in Marine Investigations

Gao

Zhao

et al. 2020

Applied Sciences

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The airborne transient electromagnetic (TEM) method is widely used in land applications but faces challenges in marine applications due to the strong masking effects of seawater. The accuracy of the inverse Laplace transform algorithm strongly affects the applicability of the 2.5D TEM method in marine research; thus, an appropriate transmitted waveform is required. To resolve these issues, a trapezoidal wave was utilized as the waveform of the current source, owing to the substantial energy contribution of the low-frequency range. Further, the Talbot algorithm was selected for the inverse Laplace transform as it can yield an accurate response with smaller summation terms than the commonly used Gaver–Stehfest (G-S) algorithm. On this basis, a rugged seabed and a subsea tunnel were also investigated. The voltage response is obtained when the flight heights of the loop source change. The results confirmed that the Talbot algorithm with a trapezoidal waveform is more reliable and robust for complex marine geological models and is expected to provide an effective approach for marine explorations.

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Finite element numerical simulation of 2.5D direct current method based on mesh refinement and recoarsement

et al. 2016

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2.5D induced polarization forward modeling using the adaptive finite-element method

Cited by 6 publications

References 13 publications

Three‐dimensional electrical exploration methods for the mapping of polymetallic targets in Gansu Province, China

Three‐dimensional electrical exploration methods for the mapping of polymetallic targets in Gansu Province, China

Talbot Algorithm with a Trapezoidal Wave in the 2.5D Airborne Transient Electromagnetic Method in Marine Investigations

Finite element numerical simulation of 2.5D direct current method based on mesh refinement and recoarsement

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