若尔盖铀矿田510-1铀矿床稀土元素地球化学特征  

REE geochemical characteristics of the 510-1 uranium deposit in the Zoige uranium orefield

作　　者：郑玉文 陈友良[2] 常丹 胡漾 郭锐 邓舟 ZHENG Yuwen;CHEN Youliang;CHANG Dan;HU Yang;GUO Rui;DENG Zhou(College of Earth Sciences,Chengdu University of Technology,Chengdu 610059,China;Key Laboratory of Applied Nuclear Techniques in Geosciences,Sichuan,Chengdu 610059,China;Geological survey institute of ningxia hui autonomous region,Yingchuan 750021,China)

机构地区：[1]成都理工大学地球科学学院,四川成都610059 [2]成都理工大学地学与核技术四川省重点实验室,四川成都610059 [3]宁夏回族自治区地质调查院,宁夏银川750021

出　　处：《四川冶金》2019年第6期13-18,共6页Sichuan Metallurgy

基　　金：国家自然科学基金“若尔盖地区碳硅泥岩型铀矿床垂直分带规律研究”（编号：41072064）

摘　　要：510-1铀矿床是若尔盖铀矿田具有代表性意义的典型铀矿床之一。本文对该铀矿床的矿石、地层中的岩石以及岩脉的稀土元素地球化学特征进行了系统的研究。结果表明,硅质岩的ΣREE平均含量为22.07×10-6,硅灰岩的ΣREE平均含量为18.47×10-6,而矿石的ΣREE平均含量达57.47×10-6,矿石相对赋矿围岩其ΣREE显著增加,暗示其铀矿化和蚀变过程是稀土元素富集和带入的过程。岩、矿石的稀土配分曲线以及LREE/HREE-ΣREE关系图解表明,大部分矿石与硅质岩、硅灰岩、花岗斑岩表现出相近的稀土元素地球化学特征,反映出它们之间具有密切的成因联系。矿石、硅质岩和硅灰岩的Y/Ho比值说明地层沉积与矿床形成时期均存在明显的热液流体活动。The 510-1 uranium deposit is one of the typical uranium deposits in the Zoige uranium orefield.In this paper,The geochemical characteristics of rare earth elements in ore,rocks in strata and dykes of this uranium deposit are studied systematically.The results show that the average REE content of siliceous rocks is 22.07×10-6,the average REE of siliceous limestone is 18.47×10-6,and the average REE of ore is 57.47×10-6.Compared with ore-bearing surrounding rock,itsΣREE increased significantly,suggesting that its uranium mineralization and alteration process is a process of enrichment and introduction of rare earth elements.The REE distribution curve of rock and ore,and the LREE/HREE-ΣREE relationship diagram show that most of the ores have similar geochemical characteristics of REE with siliceous rocks,siliceous limestone and granite porphyry.The Y/Ho ratio of ores,siliceous rocks and wollastonite indicates that there are obvious hydrothermal fluid activities during formation deposition and deposit formation.

关 键 词：稀土元素 地球化学 510-1铀矿床 若尔盖 

分 类 号：P619[天文地球—矿床学]