摘要
牛岭矿床属花岗岩外带型铀矿床,以往勘查成果表明铀矿化主要受上泥盆统三门滩组长石石英砂岩层间破碎带控制。在系统梳理前人成果资料的基础上,结合最新的勘查成果,应用主、微量元素地球化学示踪,对矿床地质特征及成矿作用进行了总结和研究。结果表明矿床铀矿化与中基性脉岩具时空关联,富铀的马岭岩体可以为成矿提供物质来源,成矿流体含有幔源流体组分,流体—岩石相互作用促成了成矿流体演化,矿质卸载时成矿流体为酸性热液流体,降温作用及黄铁矿还原作用是矿质卸载的重要机制。
The Niuling uranium deposit is an external granite type uranium deposit. Previous exploration results showed that the uranium metallization was controlled by the interlayer fractured zone in the feldspathic quartz sandstone of Sanmentan formation of Late Devonian period. On the basis of systematically collecting the previous exploration data, in combination with the latest exploration results, the geological characteristics and mineralization of the deposit were summarized and researched by applying the geochemical approach of major and trace elements. The result showed that the uranium mineralization is closely associated with the mafic dikes in space and time, the uranium - rich Maling intrusion could provide material sources for the mineralization and the ore - forming fluid carried mantlederived fluid components, the interaction between fluid and rock led to the evolution of ore - forming fluid. The ore - forming fluid became acid hydrothermal fluid when the ore -forming mineral was unloading and the cooling effect and pyrite reduction are the important mechanism for ore -forming mineral undeposition.
出处
《矿产勘查》
2014年第3期460-466,共7页
Mineral Exploration
基金
中国核工业地质局科研项目(编号:ZH2011270-01)资助
关键词
地质特征
地球化学
成矿作用
牛岭铀矿床
马岭岩体
geological characteristics
geochemistry
mineralization
Niuling uranium deposit
Maling intrusion
