中国における銅鉱床に関する品位- 鉱量モデル

• 張 欽礼

  東京大学大学院　工学系研究科　地球システム工学専攻

• 正路 徹也

  東京大学大学院　新領域創成科学研究科　環境学専攻

• 金田 博彰

  東京大学大学院　工学系研究科　地球システム工学専攻

書誌事項

タイトル別名

• Grade-Tonnage Models of Copper Deposits in China

抄録

Copper-bearing deposits of China are statistically analyzed in terms of ore grade, metal amount and ore tonnage. Ore grade correlates to neither metal amount nor tonnage, while metal amount depends largely on tonnage. Each of grade, metal amount and tonnage shows more or less a lognormal distribution. Based on the ratio of copper in ore value (R_Cu), Chinese copper deposits are classified into two groups: mainly copper-producing deposits (MC : R_Cu ≥ 0.5) and accessorily copper-producing deposits (AC : R_Cu < 0.5). The grade-tonnage relation of MC deposits can be combined by two exponential functions approximating high grade (> 3.0%) and low grade (< 2.0%) parts. The critical copper grade, which is obtained from the low grade part of the relation, is 0.34%. Since less metal amounts are expected with decreasing ore grade below the critical grade, Chinese copper resources are concluded to become pessimistic, because some mines are working with grades close to this critical value. Taking account of the fact that many copper deposits are actually polymetallic, Cu-equivalent grades, which are converted from ratios of metal prices to the copper price, are also introduced. The critical Cu-equivalent grade of MC deposits (0.43%) is also suggesting that Chinese copper resources are pessimistic.

収録刊行物

• 資源と素材

  資源と素材 120 (1), 19-24, 2004

  一般社団法人 資源・素材学会

キーワード

• 銅
• 中国
• 資源
• 臨界品位
• 評価

詳細情報

• CRID: 1390282681026747136
• NII論文ID: 10011983318
• NII書誌ID: AN10062646
• DOI: 10.2473/shigentosozai.120.19
• COI: 1:CAS:528:DC%2BD2cXhtFais7Y%3D
• ISSN: 18806244
• ISSN: 09161740
• 本文言語コード: en
• データソース種別:
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