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.
作者
王东旭
罗敏
聂逢君
严兆彬
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)
出处
《科学技术与工程》
北大核心
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)。
关键词
松辽盆地
泰康
四方台组
铀成矿
沉积相
构造活动
Songliao Basin
Taikang Area
Sifangtai Formation
uranium mineralization
sedimentary facies
tectonic activity
作者简介
第一作者:王东旭(1994—),男,汉族,辽宁沈阳人,硕士,助理工程师,研究方向:沉积学及矿产勘查,E-mail:351738519@qq.com。
