鄂尔多斯盆地纳岭沟铀矿床后生蚀变成因及其与铀成矿的关系  

The genesis of epigenetic alteration and its relationship with uranium mineralization in the Nalinggou uranium deposit,Ordos Basin

作　　者：戴明建[1,2] 李文辉 刘璐 彭云彪 焦养泉[1] 苗爱生 张字龙[4] DAI Mingjian;LI Wenhui;LIU Lu;PENG Yunbiao;JIAO Yangquan;MIAO Aisheng;ZHANG Zilong(Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, Hubei, China;CNNC No. 208 Geological Party, Baotou 014010, Inner Mongolia, China;Research Institute No .203, Bureau of Geology, CNNC, Xianyang 712000, Shaanxi, China;Beijing Research Institute of Uranium Geology, Beijing 100029, China)

机构地区：[1]中国地质大学(武汉)资源学院,湖北武汉430074 [2]核工业二〇八大队,内蒙古包头014010 [3]核工业二〇三研究所,陕西咸阳712000 [4]核工业北京地质研究院,北京100029

出　　处：《地质通报》2017年第4期520-526,共7页Geological Bulletin of China

基　　金：国家重点基础研究发展计划(973计划)<中国北方巨型砂岩铀成矿带陆相盆地沉积环境与大规模成矿作用>(编号:2015CB453000);中央财政项目<内蒙古鄂尔多斯盆地东北部铀矿调查评价与勘查>(编号:201601)

摘　　要：鄂尔多斯盆地纳岭沟铀矿床是中国近期落实的又一特大型铀矿床,为古层间氧化带砂岩型铀矿床。根据蚀变作用与成矿作用的关系,建立了新的古层间氧化带砂岩型铀矿床后生蚀变分类方法,即将其划分为控矿蚀变、成矿蚀变和保矿蚀变3类。分别从垂向上和平面上分析了后生蚀变的空间分布规律,剖面自下而上整体表现为保矿蚀变-成矿蚀变-控矿蚀变的垂向序列;平面上重点分析了氧化砂体厚度、氧化砂体百分率、氧化砂体底埋深、氧化砂体底标高等参数特征。The Nalinggou sandstone-hosted uranium deposit is a large-sized paleo-interlayer oxidation zone sandstone type uranium deposit.According to the study of the relationship between alteration and uranium mineralization,a new classification method for epigenetic alteration in paleo-interlayer oxidation zone sandstone type uranium deposits was established.There are three categories,i.e.,ore control alteration,mineralization alteration,and ore-protecting alteration.The spatial distribution of epigenetic alteration was analyzed vertically and horizontally.On cross sections,from the bottom to top,there exists a vertical alteration sequence of ore-protecting alternation,mineralization alteration,and ore control alteration.This paper also discussed distribution characteristics of the thickness of oxidized sandstone,the percentage of oxidized sandstone,the bottom depth of oxidized sandstone,and the elevation of oxidized sandstone bottom.

关 键 词：鄂尔多斯盆地 纳岭沟铀矿床 后生蚀变成因 直罗组 

分 类 号：P619.14[天文地球—矿床学]