Spectral induced polarization and mineral discrimination

Sampaio, Edson E. S.; Santos, Alana Batista dos; Sato, Hédison Kiuity

doi:10.1190/1.1820574

Cited by 6 publications

(7 citation statements)

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“…Representing the time dependence of the electric field as e −iωt , the expression proposed by [4] for the complex resistivity ( ) ρ ω is:…”

Section: The Fractal Modelmentioning

confidence: 99%

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The Influence of the Model Fractal Parameters on the Electromagnetic Response in Environment with Cylindrical Layers

Farias¹,

Rocha²,

Mores³

2017

IJG

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The induced polarization response of an environment presenting cylindrical layers was obtained. The fractal model for complex resistivity was employed as an intrinsic property of the polarizable layers. The influence of the model fractal parameters on the electromagnetic response was investigated. The results demonstrated that the fractal parameters dominate the apparent resistivity phase response; measurements of the induced polarization data allow for the determination of the fractal properties of the environment without noticeable electromagnetic coupling effects at frequencies below 10 4 Hz.

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“…Representing the time dependence of the electric field as e −iωt , the expression proposed by [4] for the complex resistivity ( ) ρ ω is:…”

Section: The Fractal Modelmentioning

confidence: 99%

“…This method was originally applied to the prospecting of disseminated ores, and has gradually evolved over the years, currently being used in mineral discrimination [4] and environmental studies [5] and [6].…”

Section: Introductionmentioning

confidence: 99%

The Influence of the Model Fractal Parameters on the Electromagnetic Response in Environment with Cylindrical Layers

Farias¹,

Rocha²,

Mores³

2017

IJG

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“…Representando a dependência temporal do campo elétrico como e iωt , a expressão proposta por [3] para resistividade complexa ρ(ω) é:…”

Section: O Modelo Fractalunclassified

“…Originalmente, o método era aplicado para a prospecção de minérios disseminados. Essa técnica gradualmente evoluiu, sendo atualmente empregado em discriminação mineral [3] e estudos ambientais [1] e [2].…”

Section: Introductionunclassified

Resposta de polarização induzida em poço usando o modelo fractal para resistividade complexa

Farias¹,

Oliveira²,

Rocha³

2015

Proceeding Series of the Brazilian Society of Computational and Applied Mathematics

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Resumo: A resposta de polarização induzida sobre um meio com camadas cilíndricas foi obtida.O modelo fractal para resistividade complexa foi empregado como propriedade intrínseca das camadas polarizáveis. A influência do parâmetro fractal do modelo na resposta foi investigado. Os resultados mostraram que o parâmetro fractal domina a resposta de fase da resistividade aparente; medidas de dados de polarização induzida permitem a determinação das propriedades fractais do meio sem que os efeitos de acoplamento eletromagnético sejam perceptíveis para freqüências inferiores a 10 4 Hz.

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“…Initially we employed the inversion procedure to compute the values of Dias' parameters that best matches the observed phase data from measurements on the sea bottom for four arrays spacing of investigation. Figure 10 displays both the theoretical and the experimental phase data employing the inversion algorithm of (Sampaio et al 1998) applied to the L2 norm described by Porsani et al (2000). The square error L2 norm is often associated with a Gaussian error distribution (Porsani et al 2000).…”

Section: Equivalent Analog Circuitmentioning

confidence: 99%

Apparent resistivity and spectral induced polarization in the submarine environment

Souza¹,

Sampaio

2001

An. Acad. Bras. Ciênc.

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Relatively few investigations have employed electrical methods in the submarine environment, which may be promising for mineral deposits or threatened by environmental problems. We have measured the electric field using both disk and bar electrodes in the sea water at three different levels: sea surface, seven meters deep, and sea bottom at a depth of ten meters, employing a 2 m spacing dipole-dipole array with 7 array spacings of investigation, and 13 values of frequencies at steps of (2 N hertz, N = -2, -1, 0, 1, 2,.....10). The measurement allowed the analysis of the electric field as a function of frequency and spacing, and of the spectral induced polarization. Modelling and interpretation of the apparent resistivity yielded a good fit with previous drilling data. Analysis of the spectrum of the complex apparent resistivity and the comparison with equivalent circuits, provided information about the grain size, the mineral composition and the major induced polarization phenomenon occurring below the sea. Therefore the result of the present research show the feasibility of measuring the variation of seawater resistivity in situ, as well as the resistivity of sea bottom sediments.

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Spectral induced polarization and mineral discrimination

Cited by 6 publications

References 0 publications

The Influence of the Model Fractal Parameters on the Electromagnetic Response in Environment with Cylindrical Layers

The Influence of the Model Fractal Parameters on the Electromagnetic Response in Environment with Cylindrical Layers

Resposta de polarização induzida em poço usando o modelo fractal para resistividade complexa

Apparent resistivity and spectral induced polarization in the submarine environment

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