Geophysical Survey Datasets - Airborne Electromagnetics

Airborne Electromagnetic (AEM) data are used in minerals, energy, and groundwater resource exploration. The AEM technique takes advantage of natural variations in electrical conductivity beneath the surface, which results from variation in rock and pore fluid properties. The presence of electrically conductive minerals such as graphite, clays, and sulfide minerals, or electrically conductive fluid such as saline groundwater, results in greater conductivity relative to non-conductive mineral assemblages, or non-conductive fluid (typically fresh ground water).AEM data are collected by transmitting an electromagnetic signal from a system attached to a plane or helicopter. The signal induces eddy currents in the ground which are detected by receiver coils towed below and behind the aircraft. Precompetitive AEM data and associated scientific analysis assists exploration under cover by reducing risk, stimulating investment and promoting exploration for commodities. In recent years, Geoscience Australia has flown Airborne Electromagnetic (AEM) surveys across regional Australia. Data and associated interpretations from such regional surveys have led to tenement take up, stimulated exploration for a number of commodities.