Electrical resistivity tomography to investigate geological structures of the earth's upper crust

Storz,; Jacobs, David R.

doi:10.1046/j.1365-2478.2000.00196.x

Cited by 164 publications

(80 citation statements)

References 22 publications

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“…This is done by taking a very large number of readings either from the surface or from perforations (Telford et al, 1990;Store et al, 2000). The varying geoelectric response in the area under investigation enables users to obtain 2D profiles and 3D images of the distribution of the resistivities under the ground, which makes it a very effective, non-destructive tool for analyzing and characterizing possible discontinuities in the subsoil (Sasaki, 1992;Store et al, 2000). The depth range may vary from just a few meters to hundreds of meters in depth.…”

Section: Introductionmentioning

confidence: 99%

Electrical Tomography Applied to the Detection of Subsurface Cavities

Martines-López¹,

Rey²,

Dueñas³

et al. 2013

JCKS

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Abstract:We have analyzed the geoelectric response produced by three cavities cut into different geological substrata of granite, phyllite, and sandstone that had previously been characterized by direct methods. We also examined a mining void excavated in granite. In each case, we applied three different geoelectric arrays (Wenner-Schlumberger, Wenner and dipole-dipole) and several inter-electrode spacings. The survey results suggest that electrical resistivity tomography is a viable geophysical tool for the detection and monitoring of mining voids and other subsurface cavities. The results vary depending on a wide range of factors, such as the depth and diameter of the cavity, the multi-electrode array used, the inter-electrode spacing, the geological model, and the density of the data. The resolution capacity of the Wenner-Schlumberger array for the detection of these cavities was greater than that of the Wenner array and slightly better than the dipole-dipole. There is a direct relationship between inter-electrode spacing and diameter of the cavity. In general, we observed a loss of resolution as the distance between the electrodes increased. The most efficient detection was achieved when the inter-electrodes distance was less than or equal to the diameter of the cavity itself. In addition, cavity detection became increasingly less precise with its depth beneath the surface. Cavities with a radius of about 1.5 m were located by both the WennerSchlumberger method and the dipole-dipole at depths of more than 4.6 m, which means that prospecting can be carried out at depths 3 times the radius of the cavity.

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Section: Introductionmentioning

confidence: 99%

Electrical Tomography Applied to the Detection of Subsurface Cavities

Martines-López¹,

Rey²,

Dueñas³

et al. 2013

JCKS

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“…The variations in resistivity with depths helps in the construction of a 2D profile and is considered to be the most non-destructive techniques for studying the subsurface geological variations [5][6][7].…”

Section: Methodsmentioning

confidence: 99%

Application of ERT Survey for Addressing the Issues of Urban Rain Storm Water Logging in the Qassim Province of Saudi Arabia

K.¹,

Kassem²,

T.³

et al. 2012

IJG

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The Qassim province is one of the most arid regions of Saudi Arabia, however heavy rainfall events have led to water logging problems in the populated centers like Buraidah mainly as a consequence of construction in low lying areas and valleys. Urban rain storm water logging problem were reported at 4 localities in the Buraidah Municipal area after heavy rainfall in November 2008 and March 2009. The logged water from these sites were directed to 4 manmade lakes however the stagnant water in these lakes posed a serious environmental threat mainly in the form of water borne disease. Keeping this problem in mind, a detailed geophysical investigation in the form of Electrical Resistivity Tomography was carried out using the SYSCAL Pro Unit at these 4 locations with a dipole-dipole configuration. The survey was helpful in delineating the wet zones from the dry ones and based on the interpretations the optimum depth and sites of 4 injections bore-wells were determined at each locality. These injection bore-well would serve the dual propose of getting rid of the stagnant water in these lakes and also recharging the underlying aquifers.

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“…We measured the electrical resistivity of certain materials, which is the resistance that is encountered by an electric current when passing through a material [27,28]. The variations in the geoelectric behaviour allow 2D profiles to be constructed, which makes ERI one of the most effective non-destructive tools for studying and characterizing discontinuities in the subsurface [28,29].…”

Section: Eri Data Acquisition and Processingmentioning

confidence: 99%

Utilization of Integrated Geophysical Techniques to Delineate the Extraction of Mining Bench of Ornamental Rocks (Marble)

et al. 2017

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Low yields in ornamental rock mining remain one of the most important problems in this industry. This fact is usually associated with the presence of anisotropies in the rock, which makes it difficult to extract the blocks. An optimised planning of the exploitation, together with an improved geological understanding of the deposit, could increase these yields. In this work, marble mining in Macael (Spain) was studied to test the capacity of non-destructive geophysical prospecting methods (GPR and ERI) as tools to characterize the geology of the deposit. It is well-known that the ERI method provides a greater penetration depth. By using this technique, it is possible to distinguish the boundaries between the marble and the underlying micaschists, the morphology of the unit to be exploited, and even fracture zones to be identified. Therefore, this technique could be used in the early stages of research, to estimate the reserves of the deposit. The GPR methodology, with a lower penetration depth, is able to offer more detailed information. Specifically, it detects lateral and vertical changes of the facies inside the marble unit, as well as the anisotropies of the rock (fractures or holes). This technique would be suitable for use in a second stage of research. On the one hand, it is very useful for characterization of the texture and fabric of the rock, which allows us to determine in advance its properties, and therefore, the quality for ornamental use. On the other hand, the localization of anisotropy using the GPR technique will make it possible to improve the planning of the rock exploitation in order to increase yields. Both integrated geophysical techniques are effective for assessing the quality of ornamental rock and thus can serve as useful tools in mine planning to improve yields and costs.

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Electrical resistivity tomography to investigate geological structures of the earth's upper crust

Cited by 164 publications

References 22 publications

Electrical Tomography Applied to the Detection of Subsurface Cavities

Electrical Tomography Applied to the Detection of Subsurface Cavities

Application of ERT Survey for Addressing the Issues of Urban Rain Storm Water Logging in the Qassim Province of Saudi Arabia

Utilization of Integrated Geophysical Techniques to Delineate the Extraction of Mining Bench of Ornamental Rocks (Marble)

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