松辽盆地南部通辽-通榆地区姚家组铀、铁和有机碳分布及指示意义  

Distribution of Uranium, Iron and Carbon of Yaojia Formation in Tongliao-Tongyu Area of Southern Songliao Basin and Its Prospecting Significance

作　　者：佟术敏 宁君[1] 柳东良 封志兵[2] 蔡建芳[1] 宋海瑞[1] 李继木 丁浩 TONG Shumin;NING Jun;LIU Dongliang;FENG Zhibing;CAI Jianfang;SONG Hairui;LI Jimu;DING Hao(Geological Party No.243,CNNC,Chifeng,Inner Mongolia 024006,China;Key Laboratory of Nuclear Resources and Environment,Ministry of Education,East China Institute of Technology,Nanchang,Jiangxi 330013,China)

机构地区：[1]核工业二四三大队,内蒙古赤峰024006 [2]东华理工大学,核资源与环境国家重点实验室,江西南昌330013

出　　处：《铀矿地质》2019年第5期282-291,共10页Uranium Geology

基　　金：中国核工业地质局项目“内蒙古开鲁-吉林镇赉地区铀矿资源调查评价”(编号:201709-4);“内蒙古奈曼-吉林省瞻榆地区铀矿资源调查评价”项目(编号:201910-05);东华理工大学核资源与环境国家重点实验室开放基金项目(编号:NRE1809)联合资助

摘　　要：松辽盆地南部近几年不断实现找矿新突破,对影响成矿作用的因素也有不同的认识。通过对选区的砂岩样品进行微量铀、铁和有机碳的含量测试,分析其分布情况,进而分别论述其与铀成矿的关系。结果表明,微量铀可以直接反应铀元素的富集程度,铁和有机碳对铀成矿起到积极作用。在含矿层中最重要的含铁矿物黄铁矿和有机碳均可提高砂体的还原容量,铀矿物多与黄铁矿和有机碳密切共生,有机碳被氧化可使砂体酸化,从而促进铀的富集沉淀。此外,钻孔揭露的铀矿化基本处于Fe^2+/Fe^3+值在1~3之间的氧化-还原区域和有机碳含量在0.07%~0.23%的区域。通过对上述分析讨论,最终在莫力庙-花吐古拉地区和衙门营子-通榆地区圈定铀成矿远景区两片,为下一步勘查工作提供依据。In the south of Songliao Basin,new breakthroughs have been achieved in recent years,but there are different understandings on the factors influencing the mineralization.This paper discussed the relationship between iron and organic carbon content distribution in different sedimentary environments and uranium mineralization respectively.The analysis showed that both iron and organic carbon play a positive role in uranium mineralization.The most important iron bearing pyrite and organic carbon in the ore-bearing strata can both increase the reduction capacity of the reservoir and adsorb uranium minerals.Uranium minerals mostly co-exist with pyrite.In addition,the uranium mineralization revealed by drilling is basically in the redox region with the ratio of Fe^2+/Fe^3+between 1 and 3 and the area with organic carbon content between 0.07%~0.23%.

关 键 词：通辽-通榆地区 微量铀 Fe^2+/Fe^3+值 有机碳 铀成矿 

分 类 号：P595[天文地球—地球化学]