| 四川牦牛坪稀土矿床成矿流体来源与演化初探——萤石稀土地球化学的证据 |
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| 引用本文： | 许成,黄智龙,等.四川牦牛坪稀土矿床成矿流体来源与演化初探——萤石稀土地球化学的证据[J].地质与勘探,2001,37(5):24-28. |
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| 作者姓名： | 许成 黄智龙 |
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| 作者单位： | 中国科学院地球化学研究所 |
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| 基金项目： | 国家攀登计划，95-预-39， |
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| 摘 要： | 萤石是四川牦牛坪稀土矿最重要的脉石矿物之一。根据稀土含量、有关参数及配分模式，矿区萤石可分为LREE富集型、KLEE平坦型和LREE亏损型3种，不同类型萤石之间以及每种类型萤石的稀土地球化学特征具有连续变化规律。分析结果表明：矿区3种类型的萤石为同源不同阶段形成的产物；矿床成矿流体主要来源于本区正长岩－碳酸岩岩浆演化分异的相对富集LREE的流体；矿床成矿过程中较少再有相对富集LREE的流体参与；成矿环境由相对氧化向相对还原变化。
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| 关 键 词： | 萤石 稀土地球化学 成矿流体 稀土矿床 脉石矿物 成矿环境 |
| 文章编号： | 0495-5331(2001)05-0024-05 |
| 修稿时间： | 2000年9月25日 |
SOURCE AND EVOLUTION OF ORE-FORMING FLUIDS OF MAONIUPING RARE-EA RTH DEPOSIT--EVIDENCE FROM REE GEOCHEMISTRY OF FLUORITES |
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| XU Cheng,HUANG Zhi-long,QI Liang,XIAO Hua-yun,LI Wen-bo,LIU Cong-qiang.SOURCE AND EVOLUTION OF ORE-FORMING FLUIDS OF MAONIUPING RARE-EA RTH DEPOSIT--EVIDENCE FROM REE GEOCHEMISTRY OF FLUORITES[J].Geology and Prospecting,2001,37(5):24-28. |
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| Authors: | XU Cheng HUANG Zhi-long QI Liang XIAO Hua-yun LI Wen-bo LIU Cong-qiang |
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| Abstract: | Fluorite is an important vein mineral in Maoniuping rare-earth deposit in Sichuan Province. According to REE content, REE parameters and partition patterns, fluorites in the orefield can be classified into LRE-rich, LRE-plane and LRE-loss model. The REE geochemical features of fluorites in orefield show that three model fluorites are products of different ore-forming stage, but of the same source. Ore-forming fluids were differentiated from syenites (the age of lithogenesis is Himalaya). During ore-forming process, ore-forming fluids were little mixed with rich-LRE fluids and ore-forming environment changed from relatively oxidation to reduction. |
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| Keywords: | Fluorites REE geochemistry ore-forming fluids Maoniuping rare-earth deposit |
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