Physical modeling of the adjustment distance.

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Some magnetotelluric sounding curves in polarization H show a steep rise of the apparent resistivity vs. period over great tectonic lines, such as the Periadriatic lineament in the Alps. This distortion is due to the buildup of electric charges on conductivity discontinuities and it comes to an end in the 'adjustment distance' from the discontinuity. From this point of view the character of this distortion and the adjustment distance of graphite dykes were studied by physical modeling in the field of an electric dipole between 0.01-5 MHz in different transmitter-receiver arrangements. An approximation of the magnetotelluric field enabled the features of MT curves in polarization H to be compared to the controlled source MT or frequency sounding curves, with the latter more emphasizing the transmitter effect. The values of adjustment distances measured in MT fields are near to the numerical values of Rangayanaki and Madden (1980) in case of thin dykes.-Authors

Original languageEnglish
Pages (from-to)177-199
Number of pages23
JournalActa Geodaetica, Geophysica et Montanistica Hungarica
Issue number1-2
Publication statusPublished - Jan 1 1986

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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