地质通报2017，Vol.36Issue(4)：511-519,9.
鄂尔多斯盆地北东部纳岭沟铀矿床红色蚀变矿石成因及其地质意义
The genesis of uranium ore with red alterations in the Nalinggou deposit, northeastern Ordos Basin,and its geological implications
摘要
Abstract
The large-sized Nalinggou sandstone type uranium deposit was recently discovered in northeastern Ordos Basin.Distinctly different from the typical uranium deposits of interlayer oxidation zone type in the world,this deposit is characterized not only by the tabular or stratoid orebodies controlled by the interface between monolayer grayish green paleo-oxidized sand body and underling gray sand body but also by being far away from the roof and bottom plate.Part of the ore-hosting rocks appear macroscopically as reddish and charcoal debris-bearing ores and microscopically as special paragenetic mineral assemblages consisting of coffinite,hematite (goethite),pyrite and siderite.Based on the results of rock-mineral identifications,EMPA and acidolysis hydrocarbon decomposition analysis,combined with the results of the experiments and mathematic simulations for fluid barrier theory of uranium metallogenesis by former researcher,the authors hold that the Nalinggou uranium deposit resulted from interaction between oxidizing uraniferous brine and deep-seated reducing fluid and,furthermore,the changing of the oxidizing-reducing interface in the ore-forming process was the key factor for reddish alteration of ores,and the interactions between persistent strong oxidizing uraniferous fluid and weak deep-seated reducing fluid might have been the primary factor responsible for the formation of the tabular orebodies.关键词
鄂尔多斯盆地/纳岭沟铀矿床/板状矿体/红色蚀变矿石/还原性流体Key words
Ordos Basin/Nalinggou uranium deposit/tabular orebodies/uranium ores with red alterations/deep-seated reducing fluid分类
天文与地球科学引用本文复制引用
李西得,刘军港,易超..鄂尔多斯盆地北东部纳岭沟铀矿床红色蚀变矿石成因及其地质意义[J].地质通报,2017,36(4):511-519,9.基金项目
中核集团集中研发项目《鄂尔多斯盆地北部砂岩型铀矿关键因素识别与靶区优选》(编号:地LTD1601-2)和国家重点基础研究发展计划(973计划)《典型产铀盆地成矿机理与成矿模式研究》(编号:2015CB453004) （编号:地LTD1601-2）
