| 彭红,蔡冰堰,陶平,李明琴.贵州天桥铅锌矿床地球化学特征及其地质意义[J].贵州地质,2014,31(4):256-260272 |
| 贵州天桥铅锌矿床地球化学特征及其地质意义 |
| Geochemical Characteristics and Its Geological Significance of Tianqiao Pb-Zn Deposits,Guizhou Province |
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| DOI： |
| 中文关键词: 铅锌矿床 地球化学 成矿作用 |
| 英文关键词:Pb-Zn deposits Geochemical characteristics Mineralization |
| 基金项目:贵州省地矿局2009年度重大科研项目“水城-紫云-南丹晚古生代裂陷作用及其与主要矿产的关系”(黔地矿科[2009]15号)。 |
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| 中文摘要: |
| 通过对天桥铅锌矿床常量元素、稀土元素、同位素及微量元素等地球化学特征的分析,研究了天桥铅锌矿床的成矿物质流体来源及成矿过程。研究结果表明:(1)矿石、围岩等的稀土元素组成特点相似。∑REE相对较低,LREE/HREE比值较大,稀土配分曲线呈富轻稀土的右倾型曲线。Eu负异常明显,Ce具弱负异常特征。(2)矿床成矿物质流体多来源。受陆源影响较大,主要来自上地壳,且可能主要来自赋矿地层及围岩；无大洋地壳和原始地幔来源。(3)成矿作用为热液改造成矿。 |
| 英文摘要: |
| In this paper, it studies the source of metallogenic metals and fluid in Tianqiao Pb-Zn deposits, by the means of analyses on geochemical characteristics obout the constant element, REE element, isotopes and trace elements,and so on. The results show that:① they are similar that the composition characteristics of REE in ores and wallrocks, and so on. The total amounts of REE are relatively low, the rates of LREE/HREE are greater, the chondrite-normalized REE patterns have a LREE-rich and right leaning characteristic on the whole. Eu are negative anomaly obviously; Ce has negative abnormalities weakly. ② The metallogenic metals and fluid of deposits have poly-sources. Which are influenced by terrigenous greatly, and some of them may mainly come from the upper crust, and maybe some come from the ore-bearing strata and wallrock mainly; No sources of it come from oceanic crust or primitive mantle of deep source. ③ The mineralization is transformation of hydrothermal mineralization. |
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