Case Study – Gold Mine in North America The following geophysical case study presents an electrical resistivity characterization effort by HGI at a gold mine in North America. The heap leach pad at this gold mine was suffering from the effects of solution pooling, likely attributed to compacted material at depth. The resistivity characterization included 2D acquisition along perpendicular lines and 3D modeling. HGI embarked on a large 3D resistivity survey of a conveyer stacked gold heap to investigate issues of solution pooling at the surface due to compaction at depth. Compaction and pooling is common in heaps if the ore grain size is too fine. The difficulty of efficiently leaching a heap is the tendency of finegrained material to compact and consolidate into confining layers. Solution

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