with the ore may be returned to the water body after removal of valuable minerals. Dredging techniques have long been applied to clearing sand and silt from rivers, harbors, and ship channels. Application of dredging to mining began over a century ago in rivers draining the southern New Zealand gold fields. Offshore, no minerals of any
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Get PriceMichigan iron ore averages about 51 per cent iron natural. Its parent rock, the iron formation, averages 20 per cent to 25 per cent iron. The ore is a product of a natural concentration of the iron by removal of its associated silica Ore is not found everywhere in the parent material. It represents less than one per cent of the total volume of
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