Electromagnetic responses to massive sulfide ore systems of various morphologies and conductivities

摘要

This paper provides an understanding of interpreting and evaluating airborne time domain electromagnetic (TEM) surveys as applied to massive sulfide exploration. Variations in the conductive morphologies of massive sulfide ore systems are discussed, followed by forward modelling exercises examining the derived TEM response to these morphologies and discussion of the subtleties of data interpretation. Deposit morphology in the orientation at formation and the variations occurring due to later deformation are considered. Images of corresponding resistivity-depth models are provided. The combined modelling results provide a low-cost method for initial interpretation and screening of TEM anomalies.