Comprehensive analysis and assessment of Prospective gold-ore zones using modern geophysical methods

Abstract

Relevance. The article discusses a comprehensive analysis of geological and geophysical information on ongoing research in order to identify promising areas for further exploration. Aim. Conduct a comprehensive analysis and assessment of promising areas of the Dorogovskoye field using modern GIS technologies. For the first time at the end of the 20th century, detailed exploration work clarified the occurrence of the sandstone reservoir, its thickness, and studied the data to establish the quality of the useful layer. The sandstone layer is represented by two packs. Clay shales are noted directly in the soil of the lower unit of the reservoir on the deposit area, their thickness, uncovered by boreholes, varies from 0.60 to 2.40 m. Methods. In order to trace the distribution of these parameters over the area, the following method was used. First, conditional coordinates for each well were taken, and a table of indicators for intersections was compiled. Then, based on these data, contour maps were built in the Surfer program using the “sliding window” method. The source material for the research work was the results of laboratory studies of sandstone from 17 wells drilled in the area of the Dorogovskoye deposit. 7 geological and industrial parameters were studied: overburden thickness Mv, mineral thickness Mpi, content of SiO2, Al2O3, CaO + MgO, TiO2 , Na2O + K2O) at 17 intersections of useful strata. Results. According to the maps of overburden thickness distribution, the following conclusions were made: the minimum thickness is confined to the central and northern parts of the site, and increases to the west and southeast. This distribution was taken into account when developing the intelligence system - blocks of high categories A and B are located precisely in the central part. The areal analysis of the geological and industrial parameters of the studied sandstone deposit made it possible to establish the following regularities: the presence in the central part of the deposit of a fairly thick useful stratum (more than 10 m) with the smallest values of overburden (less than 1.0 m); the central part of the deposit is characterized by elevated values of silica SiO2, not very high contents of alumina Al2O3 and components that make up clay minerals. Thus, the central zone of the Dorogovskoye deposit is the most favorable in terms of the quality of sandstones planned to be used as raw materials for construction work.