| 安徽冬瓜山铜矿床的地球化学特征 |
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| 关键词:copper deposit two-member texture geochemistry Dongguashan Anhui |
| 基金项目:国家自然科学基金项目(编号:P40272088)，国土资源部科技专项研究项目(编号:B0002_3) |
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| Geochemical Characteristics of the Dongguashan Copper Deposit in Anhui Province |
| The Dongguashan copper deposit is characterized by a vertical variation and a “two-member texture”, evidently corresponding to its two-layer texture. CaO, MgO, Fe-2O-3, FeO, Cu, Au, Zn, Ag and As contents and average δ 18O and δ 13C values increase progressively from the lower disseminated-veinlet mineralized rocks (ores) to the upper stratiform ore beds, with SiO-2, Al-2O-3, TiO-2, K-2O, Na-2O, Pb, Hg, Sb, Mo and REE contents, the measured temperatures (from 379.3 ℃to 135.0 ℃) of fluid inclusions andδ 34S values decreasing gradually. The δ 34S values of anhydrite vary from +14.8‰ to +20.5‰, whereas those of pyrite are in the range of +2.7‰～ +7.7‰. The δ 18O value of the ore-bearing silicalite is +12.0‰, while the average δ 18O value of the siderite in copper-bearing sulfide ore is +13.97‰. Geological-geochemical characteristics show the Dongguashan copper deposit to be of submarine sedimentary exhalative origin. |
| LI Hong-yang,YANG Qiu-rong,LI Ying-jie,HOU Zeng-qian,YANG Zhu-sen,MENG Yi-feng.2006.Geochemical Characteristics of the Dongguashan Copper Deposit in Anhui Province[J].Acta Geoscientica Sinica,27(6):551-556. |
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