| 陕南光石沟伟晶岩型铀矿床中长石矿物化学初步研究 |
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| 引用本文： | 冯张生.陕南光石沟伟晶岩型铀矿床中长石矿物化学初步研究[J].化工矿产地质,2012,34(2):71-76. |
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| 作者姓名： | 冯张生 |
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| 作者单位： | 陕西核工业地质局224大队,陕西西安,710024 |
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| 摘 要： | 以光石沟伟晶岩型铀矿床中相关伟晶岩中的长石为研究对象,开展系统的矿物化学电子探针研究,结果显示其中的斜长石都属于更长石、钠长石,碱性长石均为透长石,运用二长石温度计计算出了四种类型伟晶岩的结晶温度。通过研究,认为4种类型伟晶岩具有岩浆演化关系,从不含矿黑云母伟晶岩-含矿黑云母伟晶岩-二云母伟晶岩-白云母伟晶岩,随着伟晶岩岩浆演化程度的增高,成岩结晶温度不断降低,岩浆逐渐向酸性演化,同时由于黑云母等富氟矿物的产出,导致晶质铀矿的沉淀而富集成矿。
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| 关 键 词： | 光石沟 伟晶岩型铀矿 长石 矿物化学 |
THE PRELIM INARY RESEARCH ON FELDSPAR OF GUANG SH IG OU PEGM ATITE-TYPE URANIUM DEPOSIT,SOUTH SHANXI PROVINCE |
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| Feng Zhangsheng.THE PRELIM INARY RESEARCH ON FELDSPAR OF GUANG SH IG OU PEGM ATITE-TYPE URANIUM DEPOSIT,SOUTH SHANXI PROVINCE[J].Geology of Chemical Minerals,2012,34(2):71-76. |
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| Authors: | Feng Zhangsheng |
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| Institution: | Feng Zhangsheng Geological Party No.224,Shanxi Nuclear Geology Bureau,Xi’an,Shanxi,710024,China |
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| Abstract: | The study is focus on the mineral chemistry of feldspar in the pegmatite of Guangshigou pegmatite-type uranium deposit by the means of EMPA.The result shows that the plagioclases are belong to oligoclase and albite,and the alkali feldspars are belong to sanidine.The study also calculates the crystallization temperature using the two-feldspar geological thermometer.It is indicated that the four type pegmatites shows magma evolution relationship based on this research.The crystallization temperature decrease and the acid level of the magma increase,with the magma evolution.Meanwhile,the fluorine rich mineral such as biotite,and apatite crystallize from the magma.Uraninite precipitates to deposit because of above physical and chemical changes. |
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| Keywords: | Guangshigou pegmatite-type uranium deposit feldspar mineral chemistry |
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