Geophysical modeling in gold deposit through DC Resistivity and Induced Polarization methods

Moreira, César Augusto; Borssatto, Karolliny; Ilha, Lenon Melo; Santos, Shaiely Fernandes dos; Rosa, Fernanda Telles Gomes

doi:10.1590/0370-44672016690001

Cited by 17 publications

(15 citation statements)

References 6 publications

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“…From the lateral interpolation, patterned lines generated images in three dimensions -pseudo-3D, procedure adopted in some scientific articles (Moreira & Ilha, 2011;Moreira et al, 2012;Moreira et al, 2016a;Moreira et al, 2016b;Vieira et al, 2016& Côrtes et al, 2016.…”

Section: Resultsmentioning

confidence: 99%

Geophysical investigation of earth dam using the electrical tomography resistivity technique

Camarero¹,

Moreira²

2017

REM, Int. Eng. J.

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Dams are structures that dam rivers and streams for a variety of purposes. These structures often need to be sturdy to withstand the force of the impoundment and the high values of accumulated water load. The constant maintenance of these structures is essential, since a possible accident can lead to damage of catastrophic proportions. This research presents an alternative cheap and quick application for investigating water seepage in earth dams, through the application of the DC resistivity geophysical method from the electrical resistivity tomography (ERT) technique in Wenner array. Three ERT lines were placed parallel to the longitudinal axis of a dam formed by clay soil from the decomposition of diabase. The data are presented in 2D and pseudo-3D geophysical images with electrical resistivity values modeled. Based on the physical principle of electrolytic conduction, that is, decrease in electrical resistance in materials or siliceous minerals in moisture conditions as compared to the material in the dry state, the results revealed low-resistivity zones restricted to some points, associated with water infiltration in the transverse direction of the dam. The absence of evidence as water upwelling on the front of the dam together with geophysical evidence indicate saturation restricted to some points and low probability at the present time, for installation of piping processes.

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Section: Resultsmentioning

confidence: 99%

Geophysical investigation of earth dam using the electrical tomography resistivity technique

Camarero¹,

Moreira²

2017

REM, Int. Eng. J.

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“…Moreira et al . [ 22 ] show how the application of resistivity and IP supplied data for modelling of a gold deposit. Coelho et al .…”

Section: Methodsmentioning

confidence: 99%

The role of geophysics in enhancing mine planning decision-making in small-scale mining

et al. 2020

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Small-scale mining usually operates under high geological uncertainty conditions. This turns mine planning into a complex and sometimes inaccurate task, resulting in low productivity and substantial variability in the quantity and quality of the mineral products. This research demonstrates how the application of a novel methodology that relies on traditional and low-cost geophysical methods can contribute to mine planning in small-scale mining. A combination of resistivity and induced polarization methods is applied to enhance mine planning decision-making in three small-scale mining operations. This approach allows for the acquisition of new data regarding local geological settings, supporting geological modelling and enhancing decision-making processes for mine planning in a timely and low-cost fashion. The results indicate time savings of up to 77% and cost reductions of up to 94% as compared with conventional methods, contributing to more effective mine planning and, ultimately, improving sustainability in small-scale mining.

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“…From the two maps, it is observed that zones associated with high resistivity are also associated with high values of apparent chargeability. This means that there is a possibility of presence disseminated minerals hosted in rocks with high electrical resistance which is typical to hydrothermal alteration (Fon et al 2012, Moreira et al 2016). These include disseminated gold, pyrite and chalcopyrite minerals hosted in a massive quartz vein (Fon et al 2012, Moreira et al 2016.…”

Section: Resistivity Maps Of Hydrothermal Zones Resistivity and Chargeability Gradient Mapsmentioning

confidence: 99%

Integration of geophysics and remote sensing techniques in mapping zones mineralised with disseminated gold and sulphide minerals in Lolgorien, Narok County, Kenya

et al. 2021

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Even though ground geophysical surveys (especially Induced polarization and resistivity) are applied in mineral exploration, their effectiveness in identification of mineralised zones is often enhanced by integrating other mineral exploration techniques such as remote sensing and geological investigations. Integrating different techniques helps in reducing uncertainty that is often associated with mineral exploration. The methods being integrated also depend on characteristics of mineralisation and those of host rock. In this study, geophysical survey methods (induced polarization and resistivity) were integrated with remote sensing and geological methods to delineate mineralised zones in Lolgorien beyond reasonable doubt. By integrating these methods, it was found that Lolgorien’s gold and sulphide minerals (disseminated minerals) are hosted in massive quartz veins and auriferous quartz veins hosted in Banded Iron Formations. It was also found that this mineralisation was controlled by faults which mainly trend in two directions (NW-SE) and (NE-SW). Keywords: hydrothermal alteration, chargeability, resistivity, band ratio, lineament density

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Geophysical modeling in gold deposit through DC Resistivity and Induced Polarization methods

Cited by 17 publications

References 6 publications

Geophysical investigation of earth dam using the electrical tomography resistivity technique

Geophysical investigation of earth dam using the electrical tomography resistivity technique

The role of geophysics in enhancing mine planning decision-making in small-scale mining

Integration of geophysics and remote sensing techniques in mapping zones mineralised with disseminated gold and sulphide minerals in Lolgorien, Narok County, Kenya

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