| 滇东南洒西白钨矿床稀土元素地球化学特征及其成因指示意义 |
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| 引用本文： | 张彬,张林奎,石洪召,陈敏华,刘书生.滇东南洒西白钨矿床稀土元素地球化学特征及其成因指示意义[J].华南地质与矿产,2012,28(3):232-236. |
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| 作者姓名： | 张彬 张林奎 石洪召 陈敏华 刘书生 |
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| 作者单位： | 1. 成都地质调查中心,成都610082 中国地质大学（武汉）,武汉430074
2. 成都地质调查中心,成都,610082 |
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| 基金项目： | 中国地质调查局地保项目“云南麻栗坡矿产远景调查” |
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| 摘 要： | 洒西白钨矿床位于滇东南老君山矿集区内,呈层状、似层状产出。矿区围岩为一套中深变质岩,其稀土元素组成特征为:矿区围岩LREE/HREE比值为4.37~6.87,δEu为0.67~1.49,δCe值为0.62~0.98;外围混合片麻岩LREE/HREE比值为4.51~5.58,δEu平均为0.14。矿石Eu正异常与Ce负异常同时存在说明矿石沉淀时相对高温的热水流体和较低温的海水在海底发生了对流混合,部分样品中Eu负异常的形成可能与后期岩浆热液叠加改造作用有关。结合矿床地质特征,洒西白钨矿床成因为喷流沉积-后期岩浆热液改造型。
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| 关 键 词： | 稀土元素 地球化学特征 矿床成因 洒西白钨矿 滇东南 |
Rare Earth Elements Geochemical Characteristics and Its Implication for Ore Genesis in Saxi Scheelite Deposit, Southeast Yunnan Province |
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| ZHANG Bin,ZHANG Lin-Kui,SHI Hong-Zhao,CHEN Min-Hua,LIU Shu-Sheng.Rare Earth Elements Geochemical Characteristics and Its Implication for Ore Genesis in Saxi Scheelite Deposit, Southeast Yunnan Province[J].Geology and Mineral Resources of South China,2012,28(3):232-236. |
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| Authors: | ZHANG Bin ZHANG Lin-Kui SHI Hong-Zhao CHEN Min-Hua LIU Shu-Sheng |
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| Institution: | 1. Chengdu center of China Geological Survey, Chengdu 610082, China; 2. China University of Geosciences, Wuhan 430074, China) |
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| Abstract: | Saxi scheelite deposit is occurred in bed, or stratiform in Laojunshan ore cluster region, southeastern Yunnan province. The wall-rocks are a suit of mesometamorphic rocks. The different rocks have got different rare earth elements composition： wall-rocks have the LREE/HREE ratio of 4.37 - 6.87, δEu value of 0.67 - 1.49, δCe value of 0.62 - 0.98; periphery migmatitic gneiss with LREE/HREE ratio of 4.51 5.58, average δEu value of 0.14. The positive Eu anomalies and negative Ce anomalies of ore indicated that the ore precipitation by the mixing of relative high-temperature hydrothermal and lower-temperature seawater, while negative Eu anomalies of some samples maybe caused by later magmatic hydrothermal superimposition. The geochemical and geological evidence indicated that Saxi seheelite deposit is formed by exhalative-late magmatic hydrothermal process. |
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| Keywords: | rare earth elements geochemical characteristics ore genesis saxi scheelite deposit southeast Yunnan province |
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