| 江西相山矿田主要铀矿化类型及其地球化学特征对比研究 |
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| 引用本文： | 李子颖,张万良.江西相山矿田主要铀矿化类型及其地球化学特征对比研究[J].现代地质,2016,30(1):1-16. |
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| 作者姓名： | 李子颖 张万良 |
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| 作者单位： | (1. 核工业北京地质研究院，北京100029；2. 核工业二七0研究所，江西 南昌330200) |
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| 摘 要： | 江西相山矿田发现近30个铀矿床，矿化与浅成超浅成侵入岩(次火山岩)关系密切，不管是划归火山岩型还是斑岩型矿床类型，均属于热液型矿床。从热液矿床的成矿构造特点分析，相山矿田铀矿化主要有隐爆碎屑岩型和蚀变岩型两大类，后者主要有水云母化蚀变岩型和钠长石化蚀变岩型。通过收集资料，结合笔者完成的有关课题成果数据，对各铀矿化类型进行了地球化学的对比研究，结果表明：隐爆碎屑岩型矿石品位较高，U含量大多大于1%，SiO2、Na2O含量较低，P2O5含量较高，K2O/Na2O比值平均11.51，主要伴生元素有Hf、Sb、Cu、Pb、Zn、Zr等；水云母化蚀变岩型矿化的K2O/Na2O比值平均4.83，伴生元素有W、Pb、Mo、Th、Sb等；钠长石化蚀变岩型矿化的K2O/Na2O比值平均0.19，U与CaO、P2O5关系密切，伴生元素有Sr、Zr、Hf、Sc、W等。从钠长石化蚀变岩型，到水云母化蚀变岩型，到隐爆碎屑岩型，即随矿化岩石U品位的增高，稀土配分曲线呈现出从右倾向左倾有规律的变化。
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| 关 键 词： | 隐爆碎屑岩 铀矿化类型 地球化学 相山矿田 江西 |
Main Uranium Mineralization Types and Their Comparison of Geochemical Characteristics in Xiangshan Orefield,Jiangxi |
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| Institution: | ( 1. Beijing Research Institute of Uranium Geology, CNNC, Beijing100029, China; 2 . Research Institute No.270 of Nuclear Industry,Nanchang,Jiangxi330200,China) |
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| Abstract: | Nearly 30 uranium deposits found in Xiangshan orefield of Jiangxi Province, whose uranium mineralization are closely related to hypabyssal or super hypabyssal intrusive rock (subvolcanic rock). Whether porphyry or volcanic rock type is hydrothermal uranium deposits. Analyzing from the metallogenic tectonic characteristics of the hydrothermal deposits in the orefield, there are two kinds of uranium mineralization, namely, cryptoexplosion clastic rock type and alteration rock type, the latter mainly includes hydromica altered rock type and albitization altered rock type. In this paper, by collecting data, combining with the data of relevant topics, a comparative study of geochemical characteristics of various uranium mineralization was carried out. Results show that, the ore grade of cryptoexplosion clastic rock type is higher, and mostly content of U is more than 1%. There is lower SiO2 and Na2O and higher P2O5 , and the ratio of K2O and Na2O is 11.51 on average, and the main associated elements are Hf, Sb, Cu, Pb, Zn, Zr, etc.; K2O/Na2O of hydromica altered rock type is 4.83 on average, and associated elements are W, Pb, Mo, Th, Sb, etc.; K2O/Na2O of albitization altered rock type is 0.19 on average, U has a close relationship with CaO and P2O5, and associated elements are Sr, Zr and Hf, Sc, W, etc. From the albitization altered rock type, to hydromica altered rock type, to the cryptoexplosion clastic rock type, with the increasing of U grade, REE distribution curve appears a regular change from right to left lean. |
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| Keywords: | cryptoexplosive clastic rock uranium mineralization type geochemistry Xiangshan orefield Jiangxi |
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