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Gold assaying is essential in determining the amount of gold in a mineral deposit. The process involves bringing a rock sample, most often a core obtained through drilling, to a laboratory where it is examined by experts. Assay results are often mapped and used to pinpoint targets for future drill programs.
A technique called âheap leachingâ is commonly used to extract gold from ore. In heap leaching, the ore is crushed into fine particles. It is then heaped into large piles and sprayed with cyanide, which trickles down through the ore and bonds with the gold.