| 陆相次火山岩型铜银矿床稳定同位素地球化学研究 |
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| 关键词:stable isotope Cu-Ag ore deposit subvolcanic rock continental facies |
| 基金项目:原中国有色金属工业总公司科技局(1999) |
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| 摘要: |
| Stable Isotope Geochemistry of Continental Subvolcanic Cu-Ag Ore Deposits |
| Continental subvolcanic Cu-Ag ore deposits are widely distributed in China. The formation of Ag deposits is related to acidic rocks and that of Cu deposits to subdacite. The formation epoch seems to be early and late Yanshanisn. The δ 18 O values of quartz,the δ 18 O_ H_2O values,the δD values and the δ 34 S values of sulfides are from +7.9‰ to +16.3‰,from -3.0‰ to +8.1‰,from -55‰ to -106‰,and from -9.8‰ to +9.6‰,respectively. The enrichment of S isotopes in sulfides is in order of δ 34 S_ Py ,δ 34 S_ Sp ,δ 34 S_ Gn ,and δ 34 S_ Po . The equilibration temperatures of sulfide ores are from 160 ℃ to 400 ℃.The values of S isotopes in solution are mostly from +2‰ to +5‰,with a few being +20‰. |
| XU Wen-xin,LI Heng,LI Yi,CHEN Min-yang,PANG Chun-yong.2004.Stable Isotope Geochemistry of Continental Subvolcanic Cu-Ag Ore Deposits[J].Acta Geoscientica Sinica,25(2):114-118. |
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