Interpretation of Data from Electrical Resistivity Measurements

Frangos, William

doi:10.4133/1.2921892

Cited by 4 publications

(4 citation statements)

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“…2a-d). Data acquisition followed the Schlumberger-Wenner configuration (Ward, 1988;Frangos, 1990) because it is sensitive to vertical and horizontal variations and a good intermediate between the Wenner and Dipole-dipole array configurations (Pazdirek and Blaha, 1996). The electrode spacing and the data acquisition method used in this study had been proven sufficient to provide the resolution and cover the width (,300 m) and depth (,30 m) of the mine tailing ponds in the study area (e.g., Aracil et al, 2007;Faz et al, 2006).…”

Section: Electrical Resistivity Measurements and Imagingmentioning

confidence: 99%

Electrical Resistivity Imaging Revealed the Spatial Properties of Mine Tailing Ponds in the Sierra Minera of Southeast Spain

Martínez‐Pagán

Cano

Aracil

et al. 2009

JEEG

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Mine tailing ponds are environmental hazards because of high susceptibility to leaching and erosion by water and wind. Vegetation establishment is an effective technique to reclaim tailing ponds but requires knowledge of the spatial relationship between the structural composition and physical and chemical properties of soils. In this study we have demonstrated the use of electrical resistivity imaging (ERI), combined with soil chemical analyses, to determine the structural and chemical composition of mine tailing ponds to assess efficient measures of environmental protection. We used a Syscal R1 resistivity meter to generate twoand three-dimensional (2-D/3-D) ERI images from El Lirio and Brunita mine tailing ponds. Soil samples were collected at 1-m intervals to a depth of 15 m, and were analyzed for pH, electrical conductivity and cadmium (Cd), copper (Cu), lead (Pb) and zinc (Zn) contents. Results show that materials in the ponds can be classified into three categories: fine tailings -low ER (,8 Vm), coarse waste rock -intermediate ER (8-150 V-m), and bedrock -high ER (.150 V-m). Our interpretation of the 2-D/3-D ERI images with respect to the historical depositions of materials in the ponds show that at El Lirio, decant water outlet was initially at the center and advanced to the east of the tailing pond as the mining activities progressed. At Brunita, the intermediate ER values on the west side of the pond marked the deposition of coarse waste rock materials released during a pond breakage in 1972. The ERI helped us image the spatial distribution of tailings and its qualitative spatial correlation with chemical properties (i.e., pH, EC, metals content). Low ER values are related to high amounts of Zn, Pb, Cu and Cd. These qualitative relationships underlie the usefulness of the combined geophysical and soil chemical approaches to improve our understanding of the properties of mine tailing ponds in the Sierra Minera (and other parts of the world).

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Section: Electrical Resistivity Measurements and Imagingmentioning

confidence: 99%

Electrical Resistivity Imaging Revealed the Spatial Properties of Mine Tailing Ponds in the Sierra Minera of Southeast Spain

Martínez‐Pagán

Cano

Aracil

et al. 2009

JEEG

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“…Saturated rocks/soil have lower resistivities than unsaturated and dry materials. This is due to electrolytic conduction in which aqueous ions migrate through a three-dimensional pore space matrix (Frangos, 1990).…”

Section: Rationalementioning

confidence: 99%

“…This is due to surface conduction (Frangos, 1990). The loosely bound layer of ions adsorbed to the surface of clay particles serve as paths for electric current flow.…”

Section: Rationalementioning

confidence: 99%

Rectangular Schlumberger Resistivity Arrays for Delineating Vadose Zone Clay‐Lined Fractures in Shallow Tuff

Miele¹,

Laymon²,

Gilkeson³

et al. 1996

Symposium on the Application of Geophysics to Engineering and Environmental Problems 1996

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Rectangular Schlumberger arrays can be used for 2-dimensional lateral profiling of apparent resistivity at a unique current electrode separation, hence single depth of penetration. Numerous apparent resistivity measurements are collected moving the potential electrodes (fixed MN spacing) within a rectangle of defined dimensions. The method provides a fast, cost-effective means for the collection of dense resistivity data to provide high-resolution information on subsurface hydeogeologic conditions. Several rectangular Schlumberger resistivity arrays were employed at Los Alamos National Laboratory (IANL) from 1989 through 1995 in an area adjacent to and downhill from an outfall pipe, septic tank, septic drainfield, and sump. Six rectangular arrays with 2 AB spacings were used to delineate lateral low resistivity anomalies that may be related to fractures that contain clay and/or vadose zone water. Duplicate arrays collected over a three year time period exhibited very good data repeatability.The properties of tritium make it an excellent groundwater tracer. Because triiium was present in discharged water from all of the anthropogenic sources in the vicinity it was used for this purpose. One major low resistivity anomaly correlates with relatively high tritium concentrations in the tuff. This was determined from borehole samples collected within and outside of the anomalous zone. The anomaly is interpreted to be due to fractures that contain clay from the soil profile. The clay was deposited in the fractures by aeolian processes and by surface water infiltration. The fractures likely served as a shallow vadose zone groundwater pathway.

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“…The presence of clay also reduces the resistivity of earth materials. This is due to surface conduction (Frangos, 1990). The loosely bound layer of ions adsorbed to the surface of clay particles serve as paths for electric current flow.…”

Section: Rationalementioning

confidence: 99%

Rectangular Schlumberger Resistivity Arrays For Delineating Vadose Zone Clay-Lined Fractures In Shallow Tuff

Miele

Laymon

Gilkeson

et al. 1996

9th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems

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Los Alamos National Laboratory, an affirmative actiodequal opportunity empldyer, is operated by the University of California for the U.S. Department of Energy under mntract W-7405-ENG-36. By acceptance of this arti @!. the publisher recognizes that the U.S. Government retains a nonexclusive, royalty-free license to publish or reproduce the published form of this mntribution$f requests that the publisher identify this article as work perform nt purposes. The Los Alamos National Laboratory nt of Energy.

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Interpretation of Data from Electrical Resistivity Measurements

Cited by 4 publications

References 0 publications

Electrical Resistivity Imaging Revealed the Spatial Properties of Mine Tailing Ponds in the Sierra Minera of Southeast Spain

Electrical Resistivity Imaging Revealed the Spatial Properties of Mine Tailing Ponds in the Sierra Minera of Southeast Spain

Rectangular Schlumberger Resistivity Arrays for Delineating Vadose Zone Clay‐Lined Fractures in Shallow Tuff

Rectangular Schlumberger Resistivity Arrays For Delineating Vadose Zone Clay-Lined Fractures In Shallow Tuff

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