黄沙铀矿区221铀矿床微量、稀土元素地球化学特征及其意义

221铀矿床位于黄沙铀矿区中部,其深部及外围具有一定的找矿前景。系统采集矿床坑道内矿石及围岩样品,对矿床微量元素、稀土元素地球化学特征及其与铀成矿的内在联系进行了深入探讨。研究表明,矿石与围岩中微量元素的分类明显不同,相关性上也有较大差异。与该矿床铀迁移、富集密切相关的元素有Sc、Ni、Y、Nb、Sr、Cs、Pb等高场强元素。稀土元素特征显示铀成矿物质来源具有上、下地壳混合的特点,成矿流体具有幔源性质。

Geochemical Characteristics of Trace Elements and Its Significance in Uranium Deposit 221,Huangsha Uranium Ore District

Uranium deposit 221 is located in the middle of the Huangsha uranium ore distric -t,The piuton is believed to have certain exploration potential in its deep and the rock around. On the base of systemic collection the ore and wall rocks samples in tunnels , The geochemical chara -cteristics of trace elements and rare earth elements and the intrinsic realtionto uranium mineraliz- ation had in-depth discussed in this study. Research shows that the trace elements classification in the ore and wall rocks is obvious defferent, the relativity between each elements alsohas bigger deffe -rent ,And some high field intensity elements like Sc, Ni, Y, Nb ,Sr,Cs,Pbis closely related to the uranium migration and enrichment of the ore deposit. The characteristics ofthe rareelement suggest that uranium metallogenic material has the feature of the upper and lower crust mixed,and the ore-forming fluid has the nature of the mantle source.