Scalar audiomagnetotellurics: A tool in the evaluation of nuclear waste disposal sites

Bazinet, Robert; Legault, Jean M.

doi:10.1190/1.1892882

Cited by 2 publications

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“…The authors suggest that the use of seismic-reflection techniques might allow measurement of velocity anisotropies over a wider range of conditions than that provided by refraction techniques. Bazinet, Robert, and Legault, Jean, 1985 The scalar audiomagnetotelluricmethod can be used to measure indirectly the water content of fractured or porous rock by measuring the rock's apparent resistivity. This technique is a simplified version of the conventional audiomagnetotelluric method.…”

Section: Andersonmentioning

confidence: 99%

“…Another hydrologic application is the evaluation of the suitability of various geologic structures or sites for nuclear-waste repositories. Plutons in continental shield areas and salt domes have been considered for this use because of their typically lo.v primary permeability and porosity and because of their relative tectonic stability (Wright and others, 1980;Mair and Green, 1 1981; Soonawala and Dence, 1981;Green and Mair, 1983;Bazinet and Legault, 1985). Granitic plutons commonly contain fractures or fracture systems that must be studied to prevent the migration of radioactive waste.…”

Section: Introductionmentioning

confidence: 99%

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The use of surface geophysical techniques to detect fractures in bedrock; an annotated bibliography

Lewis¹,

Haeni²

1987

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This annotated bibliography compiles references about the theory and application of surface geophysical techniques to locate fractures or fracture zones within bedrock units. Forty-three publications are referenced, including journal articles, theses, conference proceedings, abstracts, translations, and reports prepared by private contractors and U.S. Government agencies. Thirty-one of the publications are annotated. The remainder are untranslated foreign language articles, which are listed only as bibliographic references.Most annotations summarize the location, geologic setting, surface geophysical technique used, and results of a study. A few highly relevant theoretical studies are annotated also.Publications that discuss only the use of borehole geophysical techniques to locate fractures are excluded from this bibliography. Also excluded are highly theoretical works that may have little or no known practical application.

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Section: Andersonmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The use of surface geophysical techniques to detect fractures in bedrock; an annotated bibliography

Lewis¹,

Haeni²

1987

Circular

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Integration of controlled-source and radio magnetotellurics, electric resistivity tomography, and reflection seismics to delineate 3D structures of a quick-clay landslide site in southwest of Sweden

et al. 2016

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Quick clay, which is the main cause of landslides that occur in the northern countries, liquefies easily, and its presence implies an increased risk of landslide. Geophysical methods have been increasingly used in landslide investigations. Three-dimensional electric resistivity tomography, radio magnetotelluric (RMT), controlled-source RMT (CSRMT), and high-resolution reflection seismic data were acquired at a quick-clay landslide site in the southwest of Sweden. The main objectives were to evaluate the capability of each method in delineating different subsurface geologic structures that controlled a peculiar and hazardous retrogressive-type landslide in the study area. A 3D resistivity model from the inversion of CSRMT data showed the best correlation with the reflection seismic data and borehole information, thanks to the broad frequency range of the data set. It better imaged the resistive crystalline bedrock underlying the marine conductive clays and showed considerable correlations with the 3D reflection seismic data in resolving a coarse-grained layer that was interpreted to act as a conduit directing freshwater into the clays under a confined pressure, leaching their salt and forming quick clays. The 3D CSRMT resistivity model and 3D reflection seismic data showed that the coarse-grained layer has a varying thickness. At some locations, it was too thin to be resolved by the methods used here. Combination of the CSRMT model, reflection seismic data, and the borehole data suggested that a layer with thickness of approximately 5 m and resistivity between [Formula: see text] was potentially quick clay, which probably extended laterally in the entire study area. These observations suggested that future developments should focus on joint inversion of such 3D data sets incorporating sharp boundaries as constraints in the inversion and particularly when quick clays were studied.

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Scalar audiomagnetotellurics: A tool in the evaluation of nuclear waste disposal sites

Cited by 2 publications

References 0 publications

The use of surface geophysical techniques to detect fractures in bedrock; an annotated bibliography

The use of surface geophysical techniques to detect fractures in bedrock; an annotated bibliography

Integration of controlled-source and radio magnetotellurics, electric resistivity tomography, and reflection seismics to delineate 3D structures of a quick-clay landslide site in southwest of Sweden

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