吐哈盆地粘土矿物特征及其与铀成矿关系  

THE CLAY MINERAL CHARACTERISTICS AND THE RELATION TO URANIUM MINERALIZATION IN TURPAN-HAMI BASIN

作　　者：杨殿忠[1] 于漫[1] 

机构地区：[1]中国科学院广州地球化学研究所,广州510640

出　　处：《地质找矿论丛》2005年第3期188-191,203,共5页Contributions to Geology and Mineral Resources Research

基　　金：国家自然科学基金资助项目(编号40372053)资助

摘　　要：吐哈盆地是我国主要砂岩铀矿区之一,对盆地内粘土矿物特征进行的X射线衍射能谱仪(EDS)和扫描电子显微镜(SEM)分析证实:区内粘土矿物中蒙皂石基本为二八面体的蒙脱石,蒙脱石呈丝状、片状,分布于颗粒表面,在扫描电镜下,蒙脱石的集合体常呈花朵状、蜂巢状等形态,或充填于颗粒之间,高岭石集合体形态多样,主要有蠕虫状和风琴状集合体。伊利石集合体在电镜下常呈不规则片状,常平行于颗粒表面呈鳞片状排列或贴附于颗粒表面。从粘土矿物吸附铀的能力来看,氧化带岩石要远大于过渡带矿石。粘土矿物的吸附作用在过渡带铀的沉淀过程中并不起明显作用。Turpan-hami Basin is one of the sandstone uranium ore districts in China. T characteristics is analyzed by EDS and SEM. The saponites in Turpan-hami Basin is basica montmorillonites, the caolin aggregation is variform. It is mainly vermiform and organ. T ay mineral ioctahedral ites aggregation is anomalous sheet in SEM. The adsorption ability to uranium of clay in oxidation zone is bigger than that in redoxzone. The adsorption in redox zone do not havea obvious role in uranium precipitation.

关 键 词：粘土矿物 铀矿 EDS和SEM分析 吐哈盆地 

分 类 号：P574[天文地球—矿物学] P619.14[天文地球—地质学]