绥化-双城地区上白垩统嫩江组砂岩型铀矿成矿条件研究

砂岩型铀矿是近年铀矿床勘探的主要类型.绥化-双城地区初步勘探表明,该区嫩江组有铀富集现象.对研究区层序地层及沉积相特征分析,认为该区埋藏＜500m的砂体主要发育于水退体系域嫩三段;嫩三段沉积期,总体为东部物源供给,以三角洲-浅湖沉积体系为主,其砂体主要分布于卫星镇-通江镇地区的三角洲前缘带.综合其地质构造、铀源、古气候、水文地质和砂体发育条件分析,认为卫星镇-通江镇一带的嫩三段是本区铀矿勘探的有利目标.

Study on metallogenic conditions of sandstone type uranium deposit of Upper Cretaceous Nenjiang Formation in Suihua-Shuangcheng area

Uranium deposit of sandstone type is a main type of uranium diposit for prospecting. There is uranium gathering in Nenjiang Formation in Suihua-Shuangcheng area. The sandbodies buried under 500 m, mainly developed in the third member of the Nenjiang Formation of regressive system tract in this region. The region whose sources derive from east is in delta-lacustrine sedimentary system. Its sandbodies are mainly distributed in delta front of Sifangtai-Tongjiang town area. The summary and analysis of conditions of geologic structures uranium source, paleo-climate, hydrogeology, sandbodies indicate that the third member of the Nenjiang Formation is an beneficial target for explorasion of uranium diposit in Weixing-Tongjiang town in the area.