松辽盆地东北缘白垩系砂岩型铀矿成矿条件与找矿方向  

MINEROGENETIC CONDITIONS AND PROSPECTING DIRECTION OF THE CRETACEOUS SANDSTONE URANIUM DEPOSIT IN NORTHEAST SONGLIAO BASIN

作　　者：代问义 李研 赵忠华[1] 张杨[1] 张航 DAI Wen-yi;LI Yan;ZHAO Zhong-hua;ZHANG Yang;ZHANG Hang(No.240 Institute of Nuclear Industry,CNNC,Shenyang 110000,China)

机构地区：[1]核工业240研究所

出　　处：《地质与资源》2019年第6期519-525,560,共8页Geology and Resources

基　　金：中国核工业地质局“松辽盆地北部砂岩型铀矿资源调查评价”项目(编号201709)

摘　　要：通过松辽盆地东北缘蚀源区铀源条件、中生代构造演化、白垩系沉积建造研究,结合石油部门地震连井剖面等资料,综合分析了松辽盆地东北部砂岩型铀矿的成矿条件研究,认为盆缘的富铀花岗岩体提供了丰富的铀源,中生代后期反转构造形成的剥蚀天窗为含铀含氧水的渗入渗出提供了通道.研究结果显示,松辽盆地东北部绥棱地区为最有利的砂岩型铀矿找矿部位,主要找矿目标层为上白垩统泉头组兼顾浅部姚家组,找矿类型为层间氧化带型.Through studying the uranium source conditions,Mesozoic tectonic evolution and Cretaceous sedimentary formation of the provenance area in northeast Songliao Basin,combined with the seismic well-tie section data of petroleum sectors,the paper analyzes the metallogenic conditions of sandstone uranium deposits comprehensively.It is believed that the uranium-rich granite body in the basin margin provides abundant uranium sources and the denudation window formed by the inversion structure in Late Mesozoic serves as the channel for infiltration and seepage of uranium-containing and oxygenated water.The results show that Suiling area in the northeast of Songliao Basin is the most favorable prospecting site for sandstone uranium deposits,with the Upper Cretaceous Quantou Formation and the shallow part of Yaojia Formation as the main target layers,focusing on the type of interlayer oxidation zone.

关 键 词：砂岩型铀矿 上白垩统 松辽盆地 成矿条件 

分 类 号：P619.14[天文地球—矿床学]