Minable ore
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The amount of mineral reserves that can be mined. Also called the actual yield. Depending on the nature of the mineral ore, the geological structure, and the grade, only about 50-70% of the calculated mineral reserves can be economically extracted. The amount of mineral reserves can also fluctuate due to technological advances and changes in the economic value of the mineral ore. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
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埋蔵鉱量のうち，採鉱しうる鉱量。実収鉱量ともいう。鉱石や石炭は存在の仕方や地質構造，品位などにより，鉱量として計算されているうちの 50～70%程度しか経済的に採掘できない。可採鉱量はまた技術の進歩，対象鉱石の経済価値の変化によっても変動する。
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