| 富氟花岗岩体系岩浆流体内稀土元素演化规律的实验研究 |
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| 引用本文： | 李福春,朱金初,漆亮,饶冰,潘根兴.富氟花岗岩体系岩浆流体内稀土元素演化规律的实验研究[J].高校地质学报,2002,8(1):9-15. |
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| 作者姓名： | 李福春 朱金初 漆亮 饶冰 潘根兴 |
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| 作者单位： | 1. 南京农业大学资源与环境科学学院，江苏南京 210093; 2. 南京大学地球科学系，成矿作用国家重点实验室，江苏南京 210093; 3. 中国科学院 地球化学研究所，贵州 贵阳 550002 |
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| 基金项目： | 国家自然科学基金 (编号 :498730 17)，高校博士点基金 (编号 :19990 2 842 0 ) |
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| 摘 要： | 高温高压实验结果表明，随着富氟过铝花岗质岩浆分离结晶作用的进行，在与熔体相共存的流体相中，REE浓度呈有规律地变化：当温度从750℃下降至接近固相线（570℃）时，流体相中REE浓度逐渐降低，这一规律与REE在稀有金属花岗岩体上部岩相带中REE含量贫化的地质事实相一致。在富氟过铝质花岗岩体系中，REE易于分散进入某些造岩矿物（如黑云母等）和副矿物（如萤石和锡石等）中，从而不利于REE形成热液矿床。
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| 关 键 词： | 富氟花岗岩 分离结晶作用 流体相 REE浓度 高温高压实验 岩浆流体 |
| 文章编号： | 1006-7493(2002)01-09-07 |
| 修稿时间： | 2002-03-20 |
Experimental Study on Evolution of REE in Magmatic Fluid Phase in the F-Rich Granite System |
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| LI Fu chun ,ZHU Jin chu ,QI Liang ,RAO Bing ,PAN Gen xing.Experimental Study on Evolution of REE in Magmatic Fluid Phase in the F-Rich Granite System[J].Geological Journal of China Universities,2002,8(1):9-15. |
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| Authors: | LI Fu chun ZHU Jin chu QI Liang RAO Bing PAN Gen xing |
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| Institution: | 1. College of Resource and Enironment Science, Nanjing Agricultural University, Nanjing 210095, China; 2. Department of Earth Sciences and State Key Labortaory for Mineral Deposits Research, Nanjing University, Nanjing 210093, China;3. Institute of Geochemistry, Chinesse Academy of Sciences, Guiyang 550002, China |
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| Abstract: | Experiments of fractional crystal1ization under high T-P conditions demonstrate that during crystallization of F-bearing alumina-oversaturated granitic magma,an evolutional trend of REE concentrations in fluid phabe coexisting with melt phase is observed： When temperature drops from 750℃ down to solidus(about 570℃)，the REE concentrations gradually decrease. This phenomenon is consistent with the geological fact that REE contents in the upper zones of rare-metal granites are lower than in the deeper zones ．REE mostly tend to disperse in some rockforming minerals(such as biotite)and some ore-forming minerals(such as fluorite and cassiterite)．The rest of REE partition into fluid phase．The evolution characteristics of REE in the F-rich alumina-oversaturated granite system are not favorable for forming hydrothermal deposits of REE. |
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| Keywords: | F rich granites fractional crystallization fluid phase REE concentrations high T P experiments |
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