REE geochemical characteristics of the No. 302 uranium deposit in northern Guangdong, South China

作     者：ZHANG Guoquan HU Ruizhong BI Xianwu FENG Haisheng SHANG Pengqiang TIAN Jianji 

作者机构：State Key Laboratory of Ore Deposit Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China China National Nuclear Shaoguan Jingyuan Uranium Industry Co. Ltd. Shaoguan 512329 China 

出 版 物：《Chinese Journal Of Geochemistry》 (中国地球化学学报)

年 卷 期：2007年第26卷第4期

页      面：425-433页

核心收录：

学科分类：0709[理学-地质学] 081803[工学-地质工程] 07[理学] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：This work was funded jointly by the Important Research 0rientation Project under the Knowledge Innovation Program sponsored by the Chinese Academy of Sciences(Grant No.KZCX3-SW-125) the National 0utstanding Young Scientists Science Foundation of China(Grant No.49925309) 

主　　题：铀 堆积物 花岗岩 矿石 

摘      要：The No. 302 uranium deposit, located in Guangdong Province, is a typical granite-type uranium ore deposit. REE geochemical characteristics of the wall rocks, pitchblende, altered rocks, calcite and fluorite from this deposit have been systematically studied in this paper. The result showed that the alkali-metasomatic granites and other altered rocks have the same REE distribution patterns as Indosinian granites. It is indicated that the hydrothermal ore-forming solution had altered the Indosinian granites, and ore-forming materials may directly originate from the Indosinian granites. Calcite and fluorite of different stages are the products derived from the same source but different stages. The evolution and degassing of the mineralizing solution might induce LREE enrichment to varying degree. Mantle fluid and a large volume of mineralizer may be the crucial factors controlling uranium mineralization, and the hydrothermal solution with mineralizer played an important role in U transport and concentration. Meanwhile, the degassing of CO2 might promote U and REE precipitation.