Результаты применения импульсной электроразведки при поиске месторождений рудных полезных ископаемых на горном Алтае

Summary During the period from 2015 to 2017 the technology of electromagnetic sounding and induced polarization (EMS-IP) was used in the search for polymetals on Novokuznetsovskaya area and ore gold on Ishinskaya area in Mountain Altai. Whithin two field seasons of 2015–2016 an exploration consisted of 600 km was conductied on Novokuznetsovskaya area. 3D modeling of non-stationary electromagnetic fields were carried out to determine the anomalies of induced polarization corresponded to zones of continuous and disseminated sulfidization at depths of up to 700 m. According to the forecast 26 wells were drilled in Novokuznetsovskaya area where 24 of which confirmed the presence of sulfides and in 11 wells contain ore intervals with minerals of the polymetallic association. On the Ishinskaya area, the field work was carried out during 2016–2017 with the total length of the profiles about 27 running kilometers. In this area, 13 wells were drilled. 12 wells confirmed that the indused polarisation anomalies were caused by the presence of sulfides and gabbroid bodies with impregnated pyrite. The EMS-IP technology demonstrated high efficiency in the overall complex of search methods. According to drilling data the reliability of forecast of sulfide mineralization zones separation was about 91%.