【摘要】 从上白垩统泉头组-嫩江组沉积相展布、岩石地球化学及沉积期后改造作用分析入手,阐明了研究区有利铀成矿砂体主要为泉头组的辫状河与青山口组的三角洲砂体。综合研究区域成矿地质背景、铀源、古气候、水文地质、岩性岩相条件,认为范家屯九台一带的泉头组及杨大城子一带的青山口组发育辫状河或三角洲前缘砂体,构成了铀源供应充足的补径排系统,具有有利的层间氧化带形成条件,是本区地浸砂岩型铀矿的有利成矿远景区带。更多还原

【Abstract】 The analyses of the sedimentary facies,rock geochemistry and reformation after the sedimentation from the Upper Cretaceous Quantou Formation to Nenjiang Formation indicate that the beneficial sand-bodies of the uranium deposit are mainly Quantou Formation’s braided channel and Qing-shankou Formation’s delta sandstone types.By summarizing and analyzing the geological setting,uranium source,paleoclimate,hydrology,lithologic-lithofacies conditions in the region,it is indicated that the Quantou Formation in Fanjiatun-Jiutai area and the Qingshankou Formation in Yangdachenzi area are potential metallogenic prospective areas for in-situ leachable sandstone type uranium deposit in the region,which develop braided channel or delta marginal sandstones,and possess favorable forming conditions of interlayer oxidation zone,and constituting supply-passage-discharge system of abundant uranium source.更多还原