贵州开阳白马洞铀矿化岩层地球化学特征  

Geochemical Characteristics of Uranium Mineralization Rock in Baimadong,Kaiyang County,Guizhou Province

作　　者：杨瑞东[1] 任海利[1] 刘坤[1] 高军波[1] 

机构地区：[1]贵州大学资源与环境工程学院,贵州贵阳550025

出　　处：《现代地质》2014年第5期905-914,共10页Geoscience

基　　金：贵州省省长基金项目(20090179);教育部博士点基金项目(20105201110002)

摘　　要：贵州开阳白马洞铀矿是重要的蚀变型铀矿,通过对白马洞清虚洞组黑色蚀变岩及白云岩风化红粘土和寒武系牛蹄塘组黑色页岩的常量元素、微量元素和稀土元素组成的分析研究,发现铀元素含量与Re、Se、Pb、Cu、As、Sb、Tl、Zn、Ni、Mo、Co、S含量为正相关关系,铀含量高,则Re、Se、Pb、Cu、As、Sb、Tl、Zn、Ni、Mo、Co、S含量也高,其中As、Co、Mo、Ni、Re、Tl、Zn、S具有显著的正相关性,而且地表土壤中Se、V、Mo等元素的富集是铀矿找矿的主要标志之一。根据白马洞清虚洞组、寒武系牛蹄塘组黑色页岩、灯影组硅化白云岩的稀土元素配分模式分析,硒富集和铀矿化矿源层不仅是牛蹄塘组黑色页岩,可能有更深部的矿源存在。认为硒富集区是铀矿找矿远景区域;古代炼汞矿渣富集铀矿,值得开发利用和治理。Baimadong uranium deposit is an important alteration-type uranium deposit.On the basis of the re-search and analysis on major elements,trace elements and REE compositions of Qingxudong Formation black al-tered rock in Baimadong,weathered red clay from dolomite and Cambrian black shale,a positive correlation in concentration was found between uranium and Re,Se,Pb,Cu,As,Sb,Tl,Zn,Ni,Mo,Co,S.The content of Re,Se,Pb,Cu,As,Sb,Tl,Zn,Ni,Mo,Co,S increases with the increasing of uranium content,of which uranium and As,Co,Mo,Ni,Re,Se,Tl,Zn,S show dramatic positive correlation.Se,V,Mo con-centration in soil was considered as one of the main attributes to prospect uranium deposits.According to the analysis of REE distribution pattern among Qingxudong Formation in Baimadong,Cambrian black shale and si-licified dolomite of Dengying Formation,material source of Se concentration and uranium mineralization were not only originated from Niutitang Formation,but also possibly from deeper material source.Therefore,the Se con-centration area is probably the area that uranium deposits are located in.The ancient slag from mercury smelting concentrates uranium,which is also worth exploring and treating.

关 键 词：硒富集 微量元素 稀土元素 铀矿化层 开阳 

分 类 号：P619.1[天文地球—矿床学]