| 四川冕宁稀土矿床脉石矿物的微量及稀土元素地球化学特征 |
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| 引用本文： | 牛贺才,林传仙.四川冕宁稀土矿床脉石矿物的微量及稀土元素地球化学特征[J].地球化学,1995(3). |
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| 作者姓名： | 牛贺才 林传仙 |
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| 作者单位： | 中国科学院广州地球化学研究所 |
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| 摘 要： | 包裹体地球化学研究表明，四川冕宁稀土矿床中存在着岩浆成因的萤石、重晶石和方解石，它们的微量元素地球化学特征与热液成因对应矿物有明显差别：岩浆成因重晶石相对富集亲石元素，贫亲硫元素；无论是岩浆成因重晶石，还是萤石均明显富集挥发分。稀土元素地球化学研究显示，不同成因萤石、重晶石在稀土元素总量、ＬＲＥＥ／ＨＲＥＥ、（Ｌａ／Ｙｂ）Ｎ、δＥｕ及δＣｅ等一系列稀土元素地球化学参数上都存在明显的差异。该项研究还揭示了岩浆成因萤石、重晶石是在相对还原和酸性体系内结晶而成的。
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| 关 键 词： | 微量元素，稀土元素，萤石，重晶石，岩浆成因 |
GEOCHEMICAL CHARACTERISTICS OF TRACE ELEMENTS IN MAJOR MINERALS OF MIANNIN REE DEPOSIT,SICHUAN PROVINCE |
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| Niu Hecai, Lin Chuanxian.GEOCHEMICAL CHARACTERISTICS OF TRACE ELEMENTS IN MAJOR MINERALS OF MIANNIN REE DEPOSIT,SICHUAN PROVINCE[J].Geochimica,1995(3). |
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| Authors: | Niu Hecai Lin Chuanxian |
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| Abstract: | The study on inclusion geochemistry shows that there exist magmatogenetic minerals, such as fluorite, barite, calcite in the Miannin REE deposit, Sichuan Province. The geochemical characteristics of their trace elements are different from those of hydrothermal minerals. The Miannin deposit has higher content of trace elements in fluorite than hydrothermal those. The magmatogenetic barite is rich in lithophile elements but poor in sulfophile ones.Both magmatogenetic barite and fluorite are extremely rich in volatile components. Barite and fluorite possess different REE geochemical characteristics depending on their origin. Magmatogenetic fluorite and barite crystallize in an acidic and reducing environment. |
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| Keywords: | trace elements REE fluorite barite magmatogenesis Sichuan |
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