地质论评2024，Vol.70Issue(3)：907-923,17.DOI:10.16509/j.georeview.2024.03.015
纳米比亚罗辛地区矿化白岗岩铀矿物学研究及意义
Uranium mineralogical research and significance of mineralized alaskite in Rossing area,Namibia
摘要
Abstract
Objectives:The Rossing deposit is a world-class alaskite-type uranium deposit,with multiple mineralization zones such as SJ,SH,SK,Z17,and Z19.There are significant differences in mineral combinations among these zones,but the level of systematic mineralogical research is not high. Methods:This work systematically studied the symbiotic combination and occurrence status of uranium minerals in the main ore(mineralization)zones of the Rossing area through methods such as rock—mineral determination,scanning electron microscopy observation,and electron probe analysis. Results:The results show that the mineralization of alaskite mineralization can be divided into three categories based on mineral assemblages:① uraninite+zircon+apatite combination,mainly distributed in the Z17,Z19,and SJ areas;② coffinite,uranothorite+sphene+apatite combination,mainly found in the SH area;③ betafite combination,mainly distributed in the SK and SH areas. Conclusions:The uranium mineralization in the study area can be divided into three stages:magmatic stage,hydrothermal stage,and epigenetic leaching stage.The magmatic stage is the primary ore-forming stage,the electron probe chemical age of uraninite in the study area is 505±11 Ma,representing the magmatic mineralization age.In the SH area,further exploration should focus on finding coffinite,uranothorite+sphene+apatite combination in mineralized alaskite.关键词
矿物组合/多期成矿/白岗岩型铀矿床/纳米比亚罗辛地区Key words
mineral combinations/multi-stage mineralization/alaskite-type uranium deposit/Rossing area,Namibia引用本文复制引用
陈旭,范洪海,何德宝,陈金勇,耿瑞瑞,陈东欢,王勇剑..纳米比亚罗辛地区矿化白岗岩铀矿物学研究及意义[J].地质论评,2024,70(3):907-923,17.基金项目
本文为中核集团自主研发项目——罗辛铀矿及外围资源扩大研究、国家自然科学基金资助项目(编号:42302094)和东华理工大学联合创新基金资助项目(编号:NRE2021-04)的成果. China National Nuclear Corporation's independent research and development project——Research on the expansion of Rossing uranium mine and peripheral resources （编号:42302094）
National Natural Science Foundation of China project(No.42302094) （No.42302094）
East China University of Technology joint innovation fund project(No.NRE2021-04) （No.NRE2021-04）
