Purpose. The aim of research is to analyze the possibilities of the transient electromagnetic method (TEM) in the near field zone provided pollution of geological media by highly mineralized waters takes place. Particular attention is paid to the distinguishing of lithological boundaries according to elecrical resistivity of layers. Methodology. The investigations were carried out in two stages: the first stage implies TEM surveys, the transformation of the field observation data into the parameters of the medium and the construction of geoelectric sections and maps of conductivity spacial distribution. At the second stage – the TEM observations over parametric wells. Waters of them are being selected for chemical analysis for salinity ( concentration of salts). Comparative analysis of the data of field observations with parametric ones allows to make construction of geological sections distinguishing the lithological boundaries reliably. Results. Investigations to have been carried out in the area of pollusion of the geological medium by highly mineralized waters showed that distinguishing of layers according to their lithology depends on degree of water salinity that they are saturated. If mineralization is above 5.6 g / L the border between lithological boundaries will shift to lower hypsometric levels. When the mineralization exceed the critical - near M> 20 g / L distinguishing of lithology layers in geoelectrical sections is not possible at all. It depends on the depth of moisturing (penetration of mineralized waters) of the lower horizon only. Originality. Possibilities of TEM method for diagnosing of the geological environment in terms of pollution of groundwater by salt wastes are discussed. The results obtained reflect a strong dependance of geoelectric parameters (resistance, conductivity) on mineralization of groundwater. The impact of mineralized waters salinity on lithological boundaries determination is considered as well. The practical significance. Electromagnetic methods are widely used in prospecting geophysics. The results to have been obtained represent some aspects of TEM electromagnetic method application in conditions when the geomedium is polluted by liquid salt wastes. Beeing combined with those of other methods (geological, hydrogeological, geochemical etc.) it should be used for organizing and making arrangements to study the dynamics of negative processes, to forecast it and to warn of hazardous events on time.
- Sidorov V.A. Impulsnaya induktyvnaya elektrorazvedka [ Impulse inductive electrical prospecting]. Moscow, Nedra, 1985, 185 p.
- Shamotko V.I, Deshchytsya S.A.,.Romanyuk O.I. ta in. Elektromahnitne diahnostuvannya zabrudnennya heolohichnoho seredovyshcha vidkhodamy kaliynoho vyrobnytstva (na prykladi Kalush-Holyns'koho rodovyshcha Peredkarpattya) [Electromagnetic diagnostics of geological medium pollusion by wastes of potassium production (on example of Kalush Holyn potassium salt deposit)]. Ekolohiya dovkillya ta bezpeka zhyttyediyal'nosti [Ecology and environment safety], 2006, no.1, p. 75
- Deshchytsya S.A. Model'ni zasoby syntezu elektro-mahnitnykh obraziv neodnoridnykh heoseredovyshch [ Means of modelling for synthesis of electromagnetic images of non-gomogenious geomedia]. Preprynt AN Ukrayiny, IPPMM, no.16 [Proc. Konf. AN Ukraine. IPPMM, no.16)]. L'viv, 1993. p. 36
- Deshchytsya S.A., Shamotko V.I., Nehanova O.A. Kompleksni zasoby doslidzhennya heoseredovyshch nestatsionarnymy elektromahnitnymy polygamy [ Comprehensive research tools to explore geomedia by non-stationary electromagnetic field ] Pratsi NTSh. Heofizyka [ Proc. of Scientific Society named after T.Shevchenko]. L'viv, 2002, Vol. XVII, pp.18-24.
- Matveev V.S. i dr. Metody heofiziki v hidroheolohii i inzhenernoy heolohii [ Methods of geophysics in hydrogeology and engineer geology]. Moscow, Nedra, 1985, 109 p.