REE地球化学在砂岩型铀成矿研究中的应用——以川北砂岩型铀矿床为例  

Application of REE Characteristics in the Study of Sandstone Type Uranium Deposit:A Case Study of a Uranium Deposit in the Northern Sichuan Basin

作　　者：朱西养[1] 汪云亮[1] 王志畅[1] 张成江[1] 刘建华 

机构地区：[1]成都理工大学,610059 [2]核工业280研究所,四川广汉618300

出　　处：《地质论评》2005年第4期401-408,共8页Geological Review

基　　金：本文为国家科技攻关项目(编号2001BA609A-07-13)的成果。

摘　　要：本文在系统的取样分析基础上,总结了川北砂岩型铀矿床的稀土元素地球化学特征,分析研究了围岩、矿石、方解石脉和铀矿物的稀土元素组成、关系,讨论了岩、矿石沉积和成岩过程的稀土元素变化规律,与国内外典型的火山岩型和变质岩型热液成因铀矿床进行了对比,认为川北砂岩型铀矿具有热液(水)改造成矿作用的稀土元素地球化学特征,铀矿化经历了沉积成岩和热液改造富集两个阶段,为砂岩型铀矿成矿研究提供了新的思路。On the basis of an analysis of a large number of samples in a sandstone type uranium deposit in the northern Sichuan Basin, this paper systematically summarizes its REE geochemical characteristics, discusses the REE relations among country rocks, ores, calcite-veins and uranium minerals, and compares these characteristics with that of typical volcanic rock type uranium deposits and metamorphic rock type uranium deposits with hydrothermal origin both at home and abroad. REE in the uranium minerals of sandstone type uranium deposit in the northern Sichuan Basin have characteristics transformed by hydrothermal solution. The uranium mineralization has gone through two stages： the diagenesis and hydrothermal solution transformation.

关 键 词：川北砂岩型铀矿床 稀土元素 地球化学特征 成矿作用 地质条件 

分 类 号：P619.14[天文地球—矿床学] P59[天文地球—地质学]