纳米比亚纳米布铀成矿区大地构造演化与铀成矿  

Geotectonic Evolution and Uranium Mineralization of Namib Uranium Metallogenic Area in Namibia

作　　者：徐勇[1] 姚振凯 黄宏业[1] XU Yong;YAO Zhenkai;HUANG Hongye(Research Institute No.230,CNNC,Changsha,Hunan 410007,China)

机构地区：[1]核工业二三〇研究所,湖南长沙410007

出　　处：《世界核地质科学》2022年第2期244-253,共10页World Nuclear Geoscience

基　　金：中国核工业地质局地勘费项目(编号:202231)资助。

摘　　要：纳米比亚纳米布铀成矿区,拥有白岗岩型铀矿床11处,钙结岩型铀矿床15处,矽卡岩型铀矿床1处,铀总资源量超65万tU。前人多从岩浆分异成矿角度研究罗辛等白岗岩型铀矿床,或从表生成矿角度研究兰格海因里希等钙结岩型铀矿床,少有涉及复成因成矿分析罗辛等白岗岩型铀矿床的次生叠加成矿,及表生钙结岩型铀矿与罗辛等铀矿床区域铀成矿的内在联系。运用活化构造理论及大地构造与铀成矿演化分析方法,根据含铀岩石建造、成矿构造及铀矿床类型,探索成矿区大地构造成矿特征。得出成矿区铀成矿具多阶段构造演化、多种铀矿成因、多种成矿铀源,前后累积迭增的铀成矿特征。The Namib uranium metallogenic area in Namibia has 11 alaskite-type uranium deposits,15 calcrete-type uranium deposits and one skarn type uranium deposit,with a total uranium resource of more than 650000 t U.Predecessors have mostly studied Rossing and other alaskite-type uranium deposits from the perspective of magmatic differentiation mineralization,or langhainrich and other calcrete-type uranium deposits from the perspective of supergene mineralization,and rarely involved polygenetic mineralization,analysis of secondary superposition mineralization of Rossing and other alaskite-type uranium deposits,and the internal relationship between supergene calcrete-type uranium deposits and regional uranium mineralization of Rossing and other uranium deposits.Based on the theory of activated structure and the analysis method of tectonic and uranium metallogenic evolution,this paper explored the tectonic and metallogenic characteristics of the metallogenic area from the perspectives of uranium bearing rock formation,metallogenic structure and uranium deposit types.It was concluded that the uranium mineralization in the metallogenic area has the characteristics of multi-stage structural evolution,multiple uranium genesis,multiple metallogenic uranium sources,and accumulation and superposition one after one.

关 键 词：纳米比亚 纳米布 铀成矿区 大地构造 铀成矿作用 

分 类 号：P619.14[天文地球—矿床学] P612[天文地球—地质学]