1992
DOI: 10.1016/0031-9201(92)90006-h
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Resolution of anisotropic and shielded highly conductive layers using 2-D electromagnetic modelling in the Rhine Graben and Black Forest

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Cited by 9 publications
(10 citation statements)
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“…The concentration of z* values at 20 km reflects the top of the well-known crustal conductor beneath the Black Forest. The existence and the depth of this crustal conductor have been discussed by Tezkan et al (1992) and will not be considered in the modelling section. The qualitative interpretation of the observed transfer functions in this section will now be followed by conductivity models for the upper mantle beneath the survey area, leading to a quantitative interpretation for the period range of 600 s to 4 hr.…”
Section: Magnetotelluric Impedances and P * ( Z * ) Depth Sectionsmentioning
confidence: 99%
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“…The concentration of z* values at 20 km reflects the top of the well-known crustal conductor beneath the Black Forest. The existence and the depth of this crustal conductor have been discussed by Tezkan et al (1992) and will not be considered in the modelling section. The qualitative interpretation of the observed transfer functions in this section will now be followed by conductivity models for the upper mantle beneath the survey area, leading to a quantitative interpretation for the period range of 600 s to 4 hr.…”
Section: Magnetotelluric Impedances and P * ( Z * ) Depth Sectionsmentioning
confidence: 99%
“…They are therefore attributed to shallow distortions in the local geology and are interpreted by 2-D or 3-D effects on a lateral scale comparable with the depth of penetration at the frequency considered. However, if no anomaly in the induced magnetic field is observed and when the directional dependence of the off-diagonal elements of the impedance tensor is regionally uniform on a scale larger than the depth of penetration, many authors (Schmucker 1986;Tezkan 1988b;Groom & Bailey 1989) propose the interpretation by pseudo-horizontal anisotropy, where conductive layers in the crust and upper mantle have a highly directiondependent effective conductivity (Volbers, Jodicke & Untiedt 1990;Tezkan, Cerv & Pek 1992;Kellet, Mareschal & Kurtz 1992;Eisel 1992).…”
Section: Introductionmentioning
confidence: 99%
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“…A physically more plausible model of the electrical macroanisotropy, used in a series of interpretations (e.g. Tezkan 1988;Tezkan et al 1992;Eisel 1994), and based on stacking alternately conductive and non-conductive dykes, is subject to the same constraint. Unless powerful 3-D modelling tools are used, only structures with dykes parallel to the strike of the model can be managed.…”
Section: Introductionmentioning
confidence: 99%
“…Over the last decade, there exists a strong request in geoelectrics to model electromagnetic (EM) fields within anisotropic earth (Schmucker, 1986;Kellet et al, 1992;Tezkan et al, 1992;Eisel and Bahr, 1993). New demands have inspired the researchers to incorporate the anisotropic material parameters into modelling schemes (Davuducheva and Druskin, 1995;Weidelt, 1996).…”
Section: Introductionmentioning
confidence: 99%