安徽庐枞火山盆地铀矿床类型研究

在收集整理前人成果基础上,着重分析了庐枞盆地铀成矿地质特征及地球化学特征。盆地内铀矿化与石英正长岩具密切时空关联,石英正长岩是与火山岩同源并有时空联系的潜火山岩;潜火山岩外带砂岩层间破碎带和贯通潜火山岩与砂岩的断裂及其旁侧裂隙密集带构造是主要控矿构造,隐爆角砾岩构造亦控矿;与铀矿物伴生的金属矿物为中低温热液矿床标型矿物,铀矿石伴生元素及矿床内普遍而强烈发育的硅化,与潜火山岩型金属矿床特征相似。认为火山盆地内铀矿床类型应归属于潜火山岩型矿床,并进而对今后的铀矿勘查工作提出了建议。

Study on the uranium ore types in the Lu- Zong volcanic basin in Anhui

On the basis of collecting and sorting out previous work results, this paper focused on analysis of geological and geochemical features of uranium ore formation in the Lu-Zong basin. Uranium mineralization is closely related to quartz syenite in time and space in the basin, and the syenite has the same source as that of volcanic rock, and is rather subvolcanic rock. The sandstone interlayer fracture zone in the outer subvolcanic rock, the fault cutting through subvolcanic rock and sandstone and the flanking fracture cluster are major orecontrol structures as well as cryptoexplosive breccia structure. Metallic minerals associated with uranium mineral are guide minerals of medium-low-temperature hydrothermal ore deposit. Elements associated with uranium ore along with widespread development of silication are similar to the features of subvolcanic metallic ore deposit.The uranium ore deposit in the volcanic rock basin should be of subvolcanic type, and a suggestion is given for uranium ore exploration in the future.