摘要
鄂尔多斯盆地是我国北方砂岩型铀矿找矿的重要盆地之一,研究区位于鄂尔多斯盆地北部偏西。在野外调查和资料分析的基础上,描述了砂体的空间定位、地层、氧化带展布、铀异常等特征,研究了岩性岩相、地球化学、后生蚀变、异常晕等找矿标志,矿体的形成与"古层间氧化带"、岩石地球化学环境、直罗组下段河流相的空间展布、还原介质含量及构造等条件有关,铀成矿的主要控制因素有构造演化、目的层的氧化-还原界面、砂体的非均质性、还原介质等。研究认为本区铀富集成矿受前述控制作用明显,具有明显的找矿标志,为下一步找矿工作提供了基础支撑。
The Ordos basin is one of the important basins for the prospecting of sandstone-type uranium deposits in northern China. The study area is located in the northwest of the Ordos basin. Based on the field investigation and data,the spatial orientation,stratum,oxidation zone distribution and uranium anomaly of the sand body are described. The ore prospecting signs such as lithofacies,geochemistry,post-alteration and abnormal halo are studied. The formation of ore bodies is related to the " ancient interlayer oxidation zone",the rock geochemical environment,the spatial distribution of the river facies in the lower part of the Zhiluo formation,the content of the reducing medium and the structure. The main controlling factors of uranium mineralization are tectonic evolution,oxidation-reduction interface of the target layer,heterogeneity of the sand body,reduction medium. The study believes that the uranium-rich integrated ore in this area is obviously controlled by the above-mentioned control,and has obvious prospecting indicators,which provides basic support for the next prospecting work.
作者
陈霜
王文旭
聂逢君
彭云彪
剡鹏兵
CHEN Shuang;WANG Wen-xu;NIE Feng-jun;PENG Yun-Biao;YAN Peng-bing(Geological Party No. 208 , Baotou 014010, China;East China University of Technology,Nanchang 330013 , China)
出处
《东华理工大学学报（自然科学版）》
CAS
2019年第2期142-147,155,共7页
Journal of East China University of Technology(Natural Science)
基金
中国核工业地质局项目(201601)
“草原英才”项目
关键词
铀成矿
控制因素
找矿标志
苏台庙-巴音淖尔地区
uranium mineralization
control factors
prospecting mark
Sutaimaio-Bayinmuer area
