摘要
尼日尔(Niger)阿泽里克(Azelik)铀矿位于阿尔利特(Arlit)砂岩铀矿省西南部。在结合前人研究的基础上,通过对阿泽里克铀矿进行野外地质勘查,对各种野外现象进行分析总结,初步探讨了阿泽里克砂岩型铀矿控矿因素。阿泽里克铀矿受构造控制明显,矿化均位于NE与NW向断裂交叉处。矿化同时受沉积控制,矿化层为下白垩统阿萨乌阿(Assaousas,Kla)组砂岩。矿化砂岩以河流相中粗粒砂岩为主,孔隙度、渗透率良好,利于流体在砂岩中流通。矿床热液蚀变现象明显,存在碳酸盐化、褐铁矿化、铜矿化、还原性流体还原作用。
Azelik uranium deposit is located at the southwest of Arlit sandstone type uranium province in Niger. Based on the former prospecting in Azelik uranium deposit, analyzing and summarizing field phenomena, mineralization controlling factors are studied rudimentally. Structural controls on uranium deposits are evident because uranium deposits are located at crossover areas of NE and NW faults. Sedimentary controls on uranium metallization are indicated by the mineralization lies in Assaousas Formation of Lower Cretaceous. Mineralized sandstone is mainly middle-coarse grained sandstone which is suit for the circulation of mineralizing fluids due to good porosity and permeability. There are very obvious hydrothermal alterations in uranium deposits which include carbonatization, ferritization, copper-mineralization and reducing action of reductive fluids.
出处
《世界核地质科学》
CAS
2012年第3期149-155,共7页
World Nuclear Geoscience
基金
核能开发项目:"尼日尔区块铀矿综合识别评价技术及应用研究"
资助项目编号:地HF230-1
关键词
尼日尔
阿泽里克
砂岩型铀矿
控矿因素
Niger
Azelik
sandstone type uranium deposits
controlling factors
