Telursko kartiranje oblasti Trstenika-Vrnjci (Srbija)

Telluric mapping of Trstenik-Vrnjci region (Serbia)

Abstract

The Earth's natural electric field, telluric field, was measured in the general Trstenik area from Vrnjci to Donji Ribnik and from Brezovica to Prnjavor in the Ljubostinja river valley. Measurements were taken at each station and used in a quantitative estimate of telluric parameters for establishing the distribution of fields in the region and geoelectric feature mapping. The obtained geoelectric feature is correlated with the geologic feature known from geological mapping and drilling data for Trstenik. The expected effect of the resistivity difference between Neogene and Lower Cretaceous deposits is notable; also the resistivity variation can be traced in the basement which is, in our present knowledge, a metamorphic series. The series, according to telluric parameters, has a variable resistivity which seems to originate from the varied composition and/or metamorphic grade. The resistivity is notably anisotropic, manifested in the high gradient on the telluric parameter map, around the known fault zones.