Ore processing – Waihi GoldAt the processing plant, gold and silver are extracted from the ore. The processing plant alternates between treating ore from the Martha Mine open pit and from.ore processing newmont waihi goldgold ore processing,The Mining Process – Waihi GoldMining – open pit and underground. To define the ore from the waste rock, samples are taken and assayed. Assay results are used to mark out areas of ore and.
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