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DAILY DYNAMICS OF ELECTRICAL RESISTVITY AND GAS EMANATIONS ABOVE ABANDONED MINE WASTES (UR DUMP, WESTERN SIBERIA, RUSSIA)
Abstract
The sulfide containing wastes stocked in the Ur dumps were studied in this paper. The Novo-Ursky copper-pyrite deposit, containing the polymetallic ores, was discovered in 1932 as part of the Ursky ore field, Kemerovo region. During the day, the parameters of each of the dumps change: temperature, humidity of the upper layer, geoelectric parameters, concentrations of emitted substances (gases, vapor with volatile compounds of chemical elements). This article discusses these variables in terms of an integrated approach. The application of the method of micro-Electrical Resistivity Tomography (ERT) is used to describe the daily dynamics of the geoelectric parameters of the Ur dump. Micro-tomographic studies were conducted hourly throughout the day using the SibER-48 multi-electrode station. The results obtained indicate a certain relationship between the resistance of the upper part of the section, humidity and temperature. The main idea of the article is to consider the performed integration of micro-electrotomography methods, in-situ air analysis with a portable gas analyzer, and the collection of hydrometeorological data. Daily monitoring showed quite good convergence of the results: the dependence of the electrical resistivity on pressure, temperature, and humidity. The maximum gas concentrations were detected at the beginning of the experiment on a warm sunny evening at 20:00, when air and soil temperature (Ta, Ts) were maximum (23 and 20°?). The highest concentration of sulfur dioxide was 230 ?g/m3, this value does not exceed the maximum permissible concentration of pollutants in the air of urban and rural settlements (500 ?g/m3), but are 4.6 times higher than the permitted maximum concentration of SO2 in the air of populated areas, and these dumps are located within Ursk village.
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