广西向阳坪铀矿床黄铁矿特征及其对矿体延伸的影响
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摘要
广西向阳坪铀矿床作为华南地区近年来发现的具有巨大找矿潜力的矿床,多个单位在区内开展了不同工作。研究发现:在本区同样存在着与其他铀矿床相似的黄铁矿与铀成矿联系密切的关系。对研究区内含黄铁矿花岗岩样品采集后,通过光学显微镜、扫描电子显微镜、激光拉曼等分析方法对区内黄铁矿特征进行研究,发现浸染状含砷黄铁矿与铀成矿关系密切,并对黄铁矿的主要化学成分及Fe/(S+As)比值进行分析,结果显示:本区黄铁矿S含量为50.64%～53.73%,平均为51.71%;Fe含量为44.28%～46.97%,平均为45.61%;Fe/S比值平均为0.88,ω(Fe)与ω(S+As)具有负相关关系,以此探究黄铁矿对于向阳坪铀矿床矿体延伸的影响。
The Xiangyangping uranium deposit is a deposit with great prospecting potential discovered in recent years in South China. Many units have carried out different work in the area and conducted more analysis and research. The study also found that there are also Similar pyrites in other uranium deposits are closely related to uranium mineralization. After collecting the samples containing pyrite granite in the study area, the characteristics of pyrite were studied by optical microscopy, scanning electron microscopy, laser Raman analysis and the disseminated arsenic-bearing pyrite and uranium mineralization were found. The main chemical composition and Fe/(S+As) ratio of pyrite are analyzed. The results show that the S content of pyrite in this area is 50.64%～53.73%, with an average of 51.71%; the Fe content is 44.28%～46.97%, the average is 45.61%; the average Fe/S ratio is 0.88, and ω(Fe) has a negative correlation with ω(S+As) to explore the effect of pyrite on the ore body extension of the Xiangyangping uranium deposit.
The Xiangyangping uranium deposit is a deposit with great prospecting potential discovered in recent years in South China. Many units have carried out different work in the area and conducted more analysis and research. The study also found that there are also Similar pyrites in other uranium deposits are closely related to uranium mineralization. After collecting the samples containing pyrite granite in the study area, the characteristics of pyrite were studied by optical microscopy, scanning electron microscopy, laser Raman analysis and the disseminated arsenic-bearing pyrite and uranium mineralization were found. The main chemical composition and Fe/(S+As) ratio of pyrite are analyzed. The results show that the S content of pyrite in this area is 50.64%～53.73%, with an average of 51.71%; the Fe content is 44.28%～46.97%, the average is 45.61%; the average Fe/S ratio is 0.88, and ω(Fe) has a negative correlation with ω(S+As) to explore the effect of pyrite on the ore body extension of the Xiangyangping uranium deposit.
引文
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[2] 欧阳平宁,黄满湘,刘鑫扬,等.向阳坪铀矿床断裂构造原生晕特征及找矿意义[J].铀矿地质,2012,28(2):78-83.
[3] 李妩巍,王敢,许来生,等.大坪里—向阳坪地区铀成矿条件分析[J].世界核地质科学,2010,27(2):72-77.
[4] 李妩巍,王敢,陈卫锋,等.香草坪花岗岩体年代学和地球化学特征[J].铀矿地质,2010,26(4):215-221.
[5] 陈琪,肖建军,范立亭,等.广西向阳坪铀矿床微量元素和稀土元素地球化学特征[J].铀矿地质,2013,29(3):152-161.
[6] 邹明亮,黄宏业,刘鑫扬,等.华南诸广岩体中段含砷黄铁矿特征及其与铀成矿关系[J].地质论评,2017(4):1021-1039.
[7] 祁家明,罗春梧,黄国龙,等.粤北花岗岩型铀矿黄铁矿地球化学特征及对成矿流体的指示作用[J].铀矿地质,2015(2):73-80.
[8] 张本筠.黄铁矿对表生带中铀的迁移和沉淀的影响[J].世界核地质科学,1985(1):96.
[9] 赵凤民,沈才卿.黄铁矿与沥青铀矿的共生条件及在沥青铀矿形成过程中所起作用的实验研究[J].铀矿地质,1986(4):3-9.
[10] 周学武.辽宁丹东五龙矿区石英脉型金矿床的黄铁矿标型特征研究[J].现代地质,2005,19(2):231-238.
[11] 周学武,李胜荣,鲁力,等.浙江弄坑金银矿化区黄铁矿标型研究[J].矿物岩石,2004,24(4):6-13.
[12] 周学武,李胜荣,鲁力,等.浙江弄坑金银矿区黄铁矿成分标型研究[J].矿物岩石地球化学通报,2005,24(4):317-326.
[13] 郇伟静.川西甘孜—理塘金矿带电子探针与裂变径迹研究[D].北京:中国地质大学,2011.