赣杭铀成矿带中段火山岩型富矿体产出规律探讨  

Discussion on the Distribution Pattern of Rich Volcanic Uranium Ore Bodies in the Middle Section of Ganhang Uranium Metallogenic Belt

作　　者：熊建 许谱林 聂斌 钟鹏飞 XIONG Jian;XU Pulin;NIE Bin;ZHONG Pengfei(Research Institute No.270,CNNC,Nanchang,Jiangxi 330200,China)

机构地区：[1]核工业二七〇研究所,江西南昌330200

出　　处：《铀矿地质》2024年第5期931-939,共9页Uranium Geology

基　　金：江西省盛源矿田及邻区铀矿资源调查评价与勘查项目(编号:202230)资助。

摘　　要：赣杭铀成矿带中段已发现7个铀矿床及众多铀矿(化)点,主要产于盛源、天台山、鹅公山及桐畈火山盆地内。文章通过对赣杭铀成矿带中段富矿体产出规律进行研究,提出盆地边缘控盆主干断裂与环形火山机构复合部位是富铀体产出的有利部位,有效孔隙度大的岩石是赋矿的有利岩石。富矿体至少经历了两期铀成矿作用,其中与晚期紫黑色微晶萤石化有关的成矿作用是产生富矿体的关键。当构造复合部位、大孔隙度岩石和晚期紫黑色微晶萤石化共同发育时,往往形成铀的富矿体。据此提出盛源火山盆地散坑—熊家地段及天台山火山盆地王石山岗—姜家畈地段是寻找富矿体的有利地段,可作为下一步找矿的重点地区。In the middle section of Ganhang uranium metallogenic belt,7 uranium deposits and many uranium occurrences and prospects have been discovered mainly in Shengyuan,Tiantaishan,Ergongshan and Tongfan volcanic basins.In this paper,the distribution pattern of rich ore bodies was studied,it was pointed out that the intersection of the main basin-controlling fractures and the ring volcanic edifices at the edge of the basin were the favorable places for the formation of rich uranium ore bodies.The rocks with large effective porosity are the favorable ore-hosting rocks.The rich uranium ore bodies have experienced at least two phases of uranium mineralization,and the mineralization related to late purplish-black pyrolytization is the key to producing rich ore bodies.Uranium rich ore bodies are often formed when the structural complex,large porosity rocks and late purplish-black pyrofluorite are developed together.It was proposed that Sanking-Shengyuan area in Shengyuan volcanic basin and Wangshishangang-Jiangjiafan area in Tiantaishan volcanic basin are favorable areas for prospecting rich uranium ore bodies,and can be regarded as next focus for uranium prospecting.

关 键 词：富矿体 火山机构 产出规律 成矿特征 赣杭铀成矿带中段 

分 类 号：P619.14[天文地球—矿床学]