| 粤北凡口超大型铅锌矿热液方解石REE组成特征及其成矿意义 |
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| 引用本文：.2009.Compositions of rare earth elements(REE) in hydrothermal calcites from Fankou Superlarge scale Pb-Zn deposit, China[J].Mineral Deposits,28(Z):89~94 |
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| 基金项目:广东省自然科学基金项目（970123） |
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| 中文摘要:运用感藕等离子质谱仪（ICP-MS）对凡口大型铅锌矿床中的方解石进行稀土元素分析后表明，凡口矿床早、中、晚3期方解石中，早期和晚期方解石∑REE低（多数小于30×10-6），见显著负铕异常；而中期方解石出现∑REE总量高（多数高于120×10-62S的层间水发生混合反应沉淀出大量硫化物。 |
| 中文关键词:地球化学 热液方解石 稀土元素 凡口铅锌矿床 |
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| Compositions of rare earth elements(REE) in hydrothermal calcites from Fankou Superlarge scale Pb-Zn deposit, China |
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| Abstract:Three stages, pre-ore, ore and late-ore stages, hydrothermal calcites were recognized in Fankou superlarge scale Pb-Zn deposit, and their REE compositions were determined by using ICP-MS. The results show that the pre-ore and late ore stages calcites are characterized by low total REE content (∑REE) and marked negative Eu anomalies, while the ore stage calcites show high ∑REE and remarkable positive Eu anomalies and high LREE/HREE rations. The REE compositions of most hydrothermal calcites are quite different from those of the Devonian limestone wall rocks. The marked positive Eu anomaly in ore stage calcites imply reduced, Cl-riching and relatively high temperature deep derived hydrothermal fluid might have been involved in the Pb-Zn metallogenesis of Fankou. The deep derived hot brine was raised during activity of deep fault, mixed with H2S-bearing basinal hot brine, and caused deposition of large amount of Pb-Zn sulfides in and near the deep fault. |
| keywords:geochemistry,hydrothermal calcite, rare earth elements, Fankou Pb-Zn deposit |
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