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gold-quartz ores
Gold-bearing ore from which the sulfides have been removed by the leaching of ground waters so that the ore consists almost entirely of quartz gangue, some iron oxides, and free gold.
- スピーチの一部 noun
- 産業/ドメイン 炭鉱
- カテゴリ 炭鉱全般; Mineral mining
- Government Agency: USBM
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作成者
- ed.young
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(V.I.P) 21084 ポイント - 100% positive feedback
(Milwaukee, United States)
