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Hard Rock Mining-the process - Mining the MotherlodeThe fixed price of gold in 1934 increased from 20.67 U.S. to 35 U.S. per troy ounce. This price remained fixed until 1968 which discouraged hard rock mining for gold because increased inflation (which raised the cost of mining production) prevented the mining companies from making a profit.
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Lode vs. Placer Mining - Mining the MotherlodeGold mining operations may be carried out by either placer mining or lode mining. Lode mining is also called hard rock mining.
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