Evaluation of E.M. Anomalies at SOQUEM

CIM Bulletin, 1970

E. GAUCHER and M. ST-AMANT, SOQUEM, Ste-Foy, Quebec

Among the electromagnetic surveys performed by SOQUEM in the last three years, a certain number of the more instructive cases have been chosen to illustrate the theory of electromagnetism by field examples of: (a) The depth penetration of the TURAM as compared to the SLINGRAM (Ronka) method. (b) The limitations of the TURAM as compared to the SLINGRAM method when a conductor dips the wrong way, or when it is small in size. (c) The expression of a shallow-dipping conductor in a SLINGRAM survey. (d) The effect on the SLINGRAM survey of deep ditches or reef structures. (e) A comparison between the CRONE and the SLINGRAM method in the Abitibi clay belt, by means of field and model studies, indicating a usually better signal-to-noise ratio for the SLINGRAM method.
Keywords: Cables, clay belt, conductor, Geophysical prospecting, overburden, signal-to-noise ratio, Model, Models, Noise, Orebody, Overburden, Phase, SOQUEM, Survey, Surveys