Through recent advances in instrumentation, procedures and interpretation, borehole electromagnetic (EM) methods have become of great interest in the exploration of conductive orebodies lying at several hundreds of meters below the surface. In particular, when a borehole has missed a suspected mineralised target, these methods can indicate whether or not the expected conductive body does in fact exist in the vicinity of the borehole, and in certain cases, in which direction it lies. Consequently, these techniques are valuable for mining companies, as they can save a great deal of expensive drilling.


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