| Within framework of the project "MEGATEM Technology Enhancement", this thesis proposes several raw data processing techniques.; The MEGATEM is an airborne transient electromagnetic system used extensively in the mining industry for the detection of metalliferous bodies (Cu, Zn, Au, Ag, etc.). It possesses the characteristic of a very large magnetic moment which permits large depths of investigation (250 m). As is known, the deeper the body the weaker the associated anomaly. In the context of weak signal to noise ratios, it would be advantageous to better eliminate bothersome noise such as atmospherics and the 60 Hz transmission line signal. The objectives of my work are: (1) to develop a new methodology to eliminate atmospherics and to see their use in interpretation; (2) to treat the MEGATEM data processing stream in its entirely.; A raw data processing flow chart is created. The flowchart highlights every step necessary for generating geologically interpretable signals. (Abstract shortened by UMI.)... |
