THE RESULTS OF EXPERIMENTAL AND METHODOLOGICAL SURVEYS OF ELECTRICAL PROSPECTING AT THE SITE OF THE MSU IN ALEXANDROVKA (KALUGA REGION)
(Kulikov V.A. Ermolin E.Y. Melnikov A.V. Asoskov A.E. Polikarpova V.A. )
The results of experimental and methodological surveys which were conducted in the spring of 2019 at the “Alexandrovka”, the scientific and educational geophysical base of the Geological Faculty of Lomonosov Moscow State University in the Kaluga region is presented in the article. The testing work included several tasks. One of them consisted in comparing the results of measurements of induced polarization (IP) carried out in the time domain with the registration of the total decay of the IP field, with the results of frequency domain measurements by using the differential phase parameter (DPP). The question of the applicability of the empirical formula A.V. Kulikov (Kulikov A.V., 1978) for the calculation of DPP into apparent polarizability was raised repeatedly by many geophysicists, and this question remains open. The second task of the experimental surveys was to compare the results of geometric soundings performed with different arrays along the profile. At the last stage, along the profile, audiomagnetotellurics measurements were performed by using MTU-5A equipment and a joint inversion of the audiomagnetotellurics data and electrotomography data was applied. The result was compared with a priori geological information that is available for the area of the scientific and educational base.......