RADIO-WAVE METHOD OF GEOLOGICAL MAPPING

Abstract

Practical methods of using radio waves in geological mapping are considered. The history and basic principles of the method are briefly outlined. When transmitted radio waves penetrate the earth to a definite depth, they induce currents in the heterogeneous geological structures encountered (ore veins, contacts of different rocks, ground-water lenses, for example). The electromagnetic fields of these currents superimposed on the primary radio signal cause local anomalies qualitatively and quantitatively depending on the nature of the heterogeneity and the interrelations between the electromagnetic parameters (∊, ρ, μ) and the surrounding medium. The results of field measurements by the radio-wave method of geological mapping in different regions are described. The author's work and experiments of other investigators indicate the feasibility of radio-wave methods for large-scale geological mapping and exploration. The portable measuring apparatus, PINP-1, is a high-selective microvoltmeter measuring 3-10 m...