松辽盆地西南部大林地区铀成矿特征分析  

Analysis of Uranium Mineralization Characteristics in Dalin Area of Southwestern Songliao Basin

作　　者：张亮亮[1] 蔡建芳 姜山[1] 宁君[1] 王海涛 武飞[1] 卢天军[1] 李双龙 宫天琦 ZHANG Liangiang;CAI Jianfang;JIANG Shan;NING Jun;WANG Haitao;WU Fei;LU Tianjun;LI Shuangong;GONG Tianqi(Geologic Party No.243,CNNC,Chifeng,Inner Mongolia 024000,China;Research Institute No.240,CNNC,Shenyang,Liaoning 110000,China;Nuclear Industry Geology Bureau of Jilin Province,Changchun,Jilin 130062,China)

机构地区：[1]核工业二四三大队,内蒙古赤峰024000 [2]核工业二四〇研究所,辽宁沈阳110000 [3]吉林省核工业地质局,吉林长春130062

出　　处：《铀矿地质》2024年第3期394-403,共10页Uranium Geology

基　　金：中国核工业地质局项目“松辽盆地通辽-大庆地区铀矿资源调查评价与勘查”(编号:202212)和“内蒙古通辽市科尔沁区余粮堡-科左中旗宝德勒地区铀矿资源调查评价”(编号:202212-3)联合资助。

摘　　要：大林铀矿床是松辽盆地西南部新近探明的砂岩型铀矿床。文章对大林铀矿床的矿体产出特征、铀的赋存状态等成矿特征开展研究。研究表明,宏观上,含矿层姚家组下段氧化砂岩十分发育,铀矿体呈多层产出且受氧化带控制明显。微观上,铀主要呈吸附态,独立铀矿物与含铀矿物较少,沥青铀矿是主要的独立铀矿物,存在含钛铀矿物与闪锌矿的热液矿物组合。根据成矿特征初步判断,大林铀矿床与邻近的钱家店铀矿床和宝龙山铀矿床成因相似,是表生流体与深部流体叠加作用的结果。Dalin uranium deposit is a recently discovered sandstone-type one located in the southwestern Songliao Basin.This study aims to analyze the characteristics of uranium mineralization within the ore bodies,the occurrence state of uranium.The research findings indicate that,on a larger scale,the deposit host Yaojia Formation shows significant development of oxidized sandstone layers,and the uranium mineralization is characterized by multiple layers predominantly controlled by oxidation zones.Under microscopic examination,uranium is primarily found in an adsorbed state,with fewer occurrences of independent uranium minerals,and the pitchblende being the main independent uranium mineral.There exists a hydrothermal mineral combination containing both titanium-uranium minerals and sphalerite.In summarizing,it can be inferred that Dalin uranium deposit,along with the adjacent Qianjiadian uranium deposit and Baolongshan uranium deposit,are similar in genesis,they are the overlay products of both the supergene fluids and hot fluids.

关 键 词：砂岩型铀矿 松辽盆地 成矿作用 大林地区 铀矿物 

分 类 号：P619.14[天文地球—矿床学]