松辽盆地西缘泰康地区四方台组铀成矿特征  

Uranium Metallogenic Characteristics of Sifangtai Formation in Taikang Area,Western Margin of Songliao Basin

作　　者：王东旭 罗敏 聂逢君[2] 严兆彬[2] 张治波 WANG Dong-xu;LUO Min;NIE Feng-jun;YAN Zhao-bin;ZHANG Zhi-bo(No.240 Institute of Nuclear Industry, Shenyang 110032, China;State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, China;School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221083, China)

机构地区：[1]核工业二四○研究所,沈阳110032 [2]东华理工大学核资源与环境国家重点实验室培育基地,南昌330013 [3]中国矿业大学资源与地球科学学院,徐州221083

出　　处：《科学技术与工程》2021年第14期5677-5687,共11页Science Technology and Engineering

基　　金：中国核工业地质局项目(201709)。

摘　　要：近年来,松辽盆地西缘泰康地区四方台组发现了多处铀矿化点,显示该地区具有砂岩型铀矿找矿潜力。通过结合岩心观察、钻孔取样和室内镜下鉴定等方法,对该地区四方台组沉积相特征和构造活动等铀成矿控制条件进行分析。结果表明四方台组沉积相类型主要为三角洲平原和滨-浅湖相,砂岩具有砂体厚度较薄和含砂率较低的特征;盆地构造活动控制了区内铀矿化异常孔位的发育范围,铀矿化部位大多位于烃类等还原性流体渗出改造后的砂岩中。可见该区铀富集作用主要与深部烃类流体上移浅层位发生还原作用有关,受四方台组所发育沉积相类型控制因素较小。In recent years,several uranium mineralized occurrences have been found in Sifangtai Formation of Taikang Area in the western margin of Songliao Basin,which shows that the area has prospecting potential for sandstone type uranium deposits.The methods of core observation,drill hole sampling and microscopic identification were applied to analyze the controlling factors of uranium mineralization,such as characteristics of sedimentary facies and tectonic activities of Sifangtai Formation in the studying area.The research results show that the delta-plain and shallow lake sedimentary facies are mainly developed in the Sifangtai Formation.Sandstone is characterized by limited thickness of sand body and low sand/mud ratio.The developmental extent of uranium mineralization hole positions are controlled by the tectonic activities of the Songliao Basin.Most of the uranium mineralization sites are located in the sandstones which are seeped and reformed with the reductive hydrocarbon fluid.It is considered that the uranium enrichment in the study area is mainly related to the reducing action in the shallow layer where the deep hydrocarbon fluid moved up,less controlled by the sedimentary facies characteristics of Sifangtai Formation.

关 键 词：松辽盆地 泰康 四方台组 铀成矿 沉积相 构造活动 

分 类 号：P614.19[天文地球—矿床学]