Cost of mining it. Mining a deposit at surface is cheaper, so the cut off grade is lower. You keep typing cut of grade, the correct term is cut OFF grade. With EAG deposit what they are saying is that any deposit that is less than 3g/t is not economically viable to mine if the price of gold is $1,200. An increase in the price of gold will make a mine more profitable in 2 ways: 1) increased selling
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