Advanced Geophysical Operations and Services Inc. (AGCOS) in collaboration with National Mineral Resource University (SPMI), St. Petersburg, Russia, presented “Multifunction 4 and 8 Channel Electroprospecting Instruments of the Generation 5+” and “Effective Method for Mining Exploration” at the 3rd International GeoBaikal 2014 Conference, Irkutsk, Russia, August 18 – 22, 2014.
Multifunction 4 and 8 Channel Electroprospecting Instruments of the Generation 5+
Summary
Appearance at the turn of the century of the 5th generation multifunction electroprospecting instruments has made significant contribution to the development of electroprospecting techniques. New properties of the equipment include – light weight, compact, low power consumption, simple operation, high accuracy of the recorded parameters. One of the defining features is the application of 24-bit ADC. Technological advancements in the microprocessor development and computer technology allowed to significantly improve hardware capabilities of the 5th generation instruments, i.e. go to 5+. Super multifunction 4 and 8 channel receivers can be used in both autonomous mode and manual mode (operator control). Receivers have intuitive user interface implemented on touch-screen display and several communication modes with a PC, touchpads, and smartphone. Instruments have flexible configuration of electric and magnetic channels (channels are interchangeable), which allows to use same receiver for such seemingly incompatible methods – Electrical Profiling, IP, Electrotomography, TDEM, MT and MVP. Application of wideband high frequency ADCs and corresponding processors can significantly improve the frequency range of field investigations, as well as noise filtering capabilities. Data acquisition systems are equipped with a wideband electric and magnetic components EM field sensors, as well as a wideband portable transmitter.
Effective Method for Mining Exploration
Summary
Since the beginning of this century geoelectric methods that utilize natural alternating electromagnetic field of the Earth ia becoming more and more popular in the practice of geophysical surveys. This fact is due to the high sensitivity and resolution, as well as mobility and smaller team of field crew. One of such methods is Magnetovariational Profiling (MVP). Method is based on the measurement of three orthogonal magnetic components of Earth’ EM field. The method has a well established technique of field work, well endowed instrumental base and advanced software for processing and analysis of field data. MVP methods also has well developed techniques for both the profiles and the plane data interpretation, including methods of robust interpretation of the tipper frequency characteristics. Based on these characteristics, it is possible to determine the position of the object in terms of the ore, the depth to its center, the shape and conductivity of the body directly in the field. To the date, vast experience of successful application of MVP method had been accumulated for mining exploration and solving other geological tasks. Application of precision tripods for mounting magnetic sensors provides year-round, high-performance applications of the method in any terrain conditions.