诸广山成矿区铀矿床成矿流体地球化学特征与成矿模式  

Ore-forming fluid features and metallogenic model of uranium deposits in Zhuguangshan ore field

作　　者：费天伟 罗毅[2] 孙祥[2] 

机构地区：[1]湖南省核工业地质局,湖南长沙410011 [2]核工业北京地质研究院,中核集团铀资源勘查与评价技术重点实验室,北京100029

出　　处：《世界核地质科学》2013年第2期63-69,78,共8页World Nuclear Geoscience

摘　　要：在分析诸广山成矿区铀矿床成矿地质背景的基础上,系统论述了区内典型铀矿床成矿地质特征、成矿流体地球化学特征,提出了该区铀矿床成矿模式,指出成矿地质流体是上地幔热流体对富铀的前寒武纪基底、印支期、燕山期富铀花岗岩体交代、萃取作用的产物。成矿铀源来源于前寒武纪富铀基底和印支期、燕山早期富铀花岗岩体,成矿作用受统一的晚中生代伸展构造—深源岩浆热液流体演化机制控制,形成了内带碎裂蚀变花岗岩微脉浸染型、硅化碎裂花岗岩脉型铀矿床和外带构造角砾岩脉型铀矿床等3种成矿类型。Based on the analysis of geological backgrounds in Zhuguangshan ore field, this paper discussed the metallogenic character and ore-forming fluid features of the uranium deposits and summarized the metallogenie model. Precambrian basement, Indo-Chinese and Yanshan epoch granite mass which is the uranium sources, were altered and extracted by upper mantle hydrothermal fluid and generated the ore-forming fluid. Mineralization is controlled by Late Mesozoic outstretch structure and deep focus hydrothermal fluid. 3 metallogenetic types were classified in this ore field： crack alteration granite veinlet disseminations type, silicate crack granite vein type and dynamic breccia vein type.

关 键 词：诸广山成矿区 典型矿床 成矿流体地球化学 成矿模式 

分 类 号：P614.19[天文地球—矿床学] P598[天文地球—地质学]