相山横涧铀矿床元素地球化学特征

Geochemical Characteristic of Trace Elements of Hengjian Uranium Deposit in Xiangshan, Jiangxi

摘要: 本文通过对横涧铀矿床的地球化学研究，表明该矿床的赋矿围岩(花岗斑岩)的岩石地球化学特征具有高硅、富碱、低镁和准铝质–过铝质的岩石特征。矿床具有明显的蚀变分带特征，可以分为5个带。W、Mo、Pb可以作为寻找铀矿化的指示元素，稀土元素配分模式图表明近矿蚀变和矿石的轻稀土元素相对富集，重稀土元素相对亏损，表明近矿蚀变和矿石稀土元素具有继承性和同源性，同时说明蚀变作用对稀土元素分布模式的影响很小。

Abstract: Through the study of geochemical characteristic of Hengjian uranium deposits, it was found that the hosting rock (granite porphyry) is of quasi aluminium to peraluminous which is high in Si and alkali and low in magnesium. The deposit has a variety of alterations, including hydromicazation, albitization, chloritization, fluoritization, pyritization, and silicification. W, Mo, Pb can be used as indicators for searching uranium mineralization. According to the distribution pattern of REE, LREE is rich and HREE is relatively inadequate. Earth elements have inheritance and homology, and alteration effect has little impact on the distribution patterns of rare earth elements.