【摘要】 粤北地区是中国花岗岩型铀矿最为重要的大型矿聚集区,其主要的产铀花岗岩体是诸广山岩体和贵东岩体,均为多期多阶段的复式岩体,主要以印支期和燕山期的花岗岩为主。粤北地区的铀矿床主要由诸广山的长江铀矿田、澜河铀矿田、鹿井铀矿田和贵东岩体的下庄铀矿田组成,根据铀的成矿特征可分为硅化带型、交点型和碱交代型。粤北地区的铀成矿流体主要来自于地幔,而不是以往认为的花岗岩浆期后热液,铀源主要是粤北产铀岩体的印支期花岗岩。因此在华南开展新一轮铀矿找矿时,跳出以往“沿带找矿”的老思路,聚焦于印支期岩浆作用与铀矿床的关系,并重点关注华南地区可能的地幔柱或热点区域。更多还原

【Abstract】 Northern Guangdong province is the most important uranium deposit collective region,and its major uranium deposit plutons are Zhuguangshan granite pluton and Guidong granite pluton,which are multi-period and multi-phase composite plutons and made up mainly of Indosinian and Yanshanian granites. Uranium deposits in northern Guangdong province is mainly made up of Changjiang uranium deposit field,Lanhe uranium deposit field,Lujing uranium deposit field,which are belong to Zhuangshan pluton,and Xiazhuang uranium deposit field,which is belong to Guidong uranium deposit field. These uranium deposits can be divided into three types:silicified belt type,point of intersection type,and alkaline metasomatism type,by the metallogenic characteristics of uranium deposits. So in the new round exploration on uranium deposit in south China,We should avoid the old views for exploration by silicified belt,focus on the relation between the Indosinian magmatism and uranium deposit,and pay great attention to the regions which are possibly the mantle plume or hotspot.更多还原