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RECONSTRUCTION AND APPLICATION OF THE FARADEY METHOD FOR MODERNIZATION OF GEOPHYSICAL MAGNETOMETRY

M. N. Nikitenko 1, N. F. Krotevich 1, Iu. A. Kopytenko 2

1 A. A. Trofimuk Institute of Petroleum Geology and Geophysics SB RAS, Novosibirsk, Russia; 2 N. V. Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation RAS, Saint Petersburg, Russia

For modern geophysical magnetometry used to study the magnetic properties of rocks, we need accurate, technological, noise-proof, and, especially, metrologically secured measuring instruments. In the 1980s, on the basis of a deep reconstruction of the classical Faraday method, a relatively simple highly sensitive device was created, i. e. the magnetic susceptibility meter. Its metrological and technological parameters have exceeded manyfold the technical level of all the Faraday-type analogs. The article shows that according to the results of testing and monitoring the instrument in many geophysical organizations, according to numerical simulation and detailed analysis of its technical characteristics this meter prototype model fully complies with the modern requirements of geophysical magnetometry, and for some of the parameters mentioned above has no analogues in the sphere of measurements under consideration.

Keywords: rocks, geophysical magnetometry, Faraday method, magnetic susceptibility meter, magnetic moment, magnetism, magnetic viscosity.

DOI 10.20403/2078-0575-2019-1-25-34