Electrical Properties and Geoelectric Section of Some Sedimentary Rocks of the Baikal Natural Territory According to Radio Impedance Sounding Data

Abstract

The specific electrical resistance (electrical conductivity) of some layered sedimentary rocks of the Baikal natural territory was measured by the method of radio impedance sounding in the VLF-LF ranges of electromagnetic waves. Their geoelectric sections are determined. Information about the geoelectrical section (GES) of sedimentary rocks of the Baikal natural territory can be used in engineering and geological surveys of the Siberia-Mongolia-China gas pipeline route, as well as in the analysis of the physico-chemical causes of the appearance of corrosion processes on long pipeline structures of the continental regions of Eurasia. The technique of radio impedance sounding can be applied to measure the electrical properties of various soils of a given territory within a layered model of a medium with a poorly and well conductive base.

Geoelectric section of the Selenga river water area based on the results of VLF-LF radio impedance soundings

“…The electromagnetic problem of obtaining quantitative data on the electrical properties and geoelectric section of the Selenga River water area was solved based on the analysis of the amplitude-phase structure of the electromagnetic field at the observation point at the interface "air-underlying medium" according to the method of radio impedance sensing [1,4].…”

“…The physical basis of the method is the skin effect. The measured tangential components of the electric E and magnetic H fields determine the reduced surface impedance of the underlying medium [4]:…”

“…Radio-wave methods of geophysics are widely used in solving engineering and geological tasks, such as determining the geoelectric section of the sedimentary rock strata [1][2][3]. However, within the Baikal natural territory, purposeful studies of the water areas of rivers in winter and their geoelectric sections (GES) were almost not carried out by radio wave methods [1,4]. The purpose of the research is to determine the electrical and geometric characteristics of the layered medium "icewater-bottom soil" of the Selenga River in the very-long-wave -long-wave (VLF-LF) radio wave ranges according to field measurements using the radio impedance method.…”