大新铀矿床微量元素富集特征

通过对大新铀矿床系统采集样品并进行岩石化学测试分析,笔者系统地研究了该矿床各构造地球化学分带中常量化学组分和微量元素含量特征,结果表明:(1)常量组分含量特征显示构造角砾岩带、糜棱岩带和构造泥经过强烈的热液改造,硅化破碎带与铀矿化关系密切;(2)矿床伴生元素Co、Ni、Ga、Mo、Re、Tl、Sb、V达到综合利用品位,As、W、Zr、Ta富集趋势明显,为热液成因指示标志;(3)铀矿化和微量元素在构造角砾岩带、糜棱岩带和构造泥中显著富集,而在碎裂岩带富集比较微弱,具有明显的构造地球化学分带性;(4)部分铀及微量元素来自深源。

Geochemic Characters of Trace Elements in Daxin Uranium Deposit

Through systematic collection and petrochemical analysis of the samples, this paper detailly studies the chemical composition of major elements and the content of trace elements in various structural geochemical zones of Daxin uranium deposite. The study shows that： （1） intense hydrothermal alteration have occurred in tectonic breccia zone, mylonite zone and the silicification is close to uranium mineraliza tion, （2） associated elements Co, Ni, Ga, Mo, Re, T1, Sb and V are of economic significance, As, W, Zr, Ta show clear enrichment trend of hydrothermal genesis, （3） tectonic breccia zone, mylonite zone and tectonic zone have striking concentrated U and associated elements while cataclasite zone have little concentrated U and associated elements, which show significant structural geochemical zonation, （4） U and associated elements are partly from deep source.