NEW METHODS OF ELECTRICAL EXPLORATION IN SIBERIA 



213 



Quantitative calculations were made using the seismic exploration results 

 at the Komissarovskaia structure (65 km to the south-west of the start of the 

 profile) as initial data. A zone of upfolding is observed in the high -resistance 

 level to the west of the Vyatkino well and in the region of the Krotovsk 

 structure. The liehaviour of the electrical marker horizon agrees well 

 with the tectonics of the Mesozoic deposits deduced from the data of seismic 

 explorations. The absolute values of stratum thicknesses of the friable 

 deposits, calculated from the telluric current are close to the bore-hole data 

 in the region of Vyatkino and Vikulovo. 



70 



50 



30 



10 

 



400 



800 



1200 



1600 



2000 



6 



Vyatkino well 



KrotovKa 

 structure 



Vikulovo well 



•'>'''''>'WWm; ,,,,,,,,,,„MMW;,.,,yMTMWW/A „ 



Fig. 13. Geoelectrical section along the Vyatkino- Vikulovo profile. 1 — surface of elec- 

 trically reflecting horizon; 2 — bottom of the friable Mesozoic deposits; 3 — surface of the 

 seismical reflecting horizon at the bottoms of the Mesozoic ; 4 — average field intensity 



of telluric currents. 



Also effective was the use of the telluric curreiU method in the Berezov 

 region, where the results of a study by telluric currents make it possible 

 to formulate a general idea of the relief of the Paleozoic foundations. 



A NEW ELECTRICAL EXPLORATION APPARATUS FOR WORK IN SIBERIA 



The standard electrical exploration equipment used by the MNP geo- 

 physical parties is not very suitable for working in inaccessible localities. 

 A modern electrical exploration station can be used only in regions with a well 

 developed road system, even when the station is mounted on the GAZ-63 

 vehicles. The apparatus for the method of telluric currents is in the form of 

 the EPO-4 oscillograph and its power supply is too large for forest parties. 

 For this reason, a number of new designs have been developed in VNIIGeofi- 

 zika to be employed in Siberian settings. 



In 1956, at the laboratory of electrical exploration and the design bureau 



