铀矿地质2025，Vol.41Issue(3)：475-486,12.DOI:10.3969/j.issn.1000-0658.2025.41.033
地层砂体坡度在可地浸砂岩型铀矿找矿中的指示作用
The Indicative Role of Stratigraphic Sand Body Slope in the Prospecting of In-situ Leachable Sandstone-type Uranium Deposit
摘要
Abstract
As a key energy mineral resource in China,the prospect prediction of leachable sandstone uranium deposit is of great value for the exploration,especially in the context of China's clean energy transition,and its environmental protection and cost-effectiveness development of nuclear energy.Traditional prospecting methods are facing challenge in predicting complex deposits,so a new concept of"stratigraphic sand body slope"is introduced,which is defined as the ratio of the thickness difference to the distance measuring the difference of the permeable sand body after the removing the impervious compartment of the target layer.The slope of the stratigraphic sand body reflects the dynamic change of the formation structure between the impervious barrier and the permeable layer of the target layer,and controls the migration,formation and enrichment process of uranium mineralization.The calculation method of sand body slope was introduced and its relationship to metallogenic mechanism was discussed in the case study of Ordos Basin and Songliao Basin.Thickness data of 940 boreholes in Husiliang uranium mineralization cluster,Nalinggou and Hailijin uranium deposits were collected to calculate the sand body slope.The slope of the stratigraphic sand body was found significantly correlated with uranium enrichment in the range of 1.50%to 15%.In general,the slope of the stratum sand body can be used as a prospecting index for in-situ leachable sandstone uranium deposit in optimizing the exploration strategy,improving the accuracy of prospecting,and reducing the risk of prospecting investment.Future research on stratigraphic sand body slope should combine multi-parameter analysis,improve the metallogenic prediction model to elevate the efficiency and economic effect of overall geological exploration.关键词
可地浸砂岩型铀矿/地层砂体坡度/地质勘查/找矿指标Key words
in-situ leachable sandstone uranium deposit/stratigraphic sand body slope/geological exploration/prospecting indicators分类
天文与地球科学引用本文复制引用
张更信..地层砂体坡度在可地浸砂岩型铀矿找矿中的指示作用[J].铀矿地质,2025,41(3):475-486,12.基金项目
中国地质调查局发展研究中心整装勘查区找矿预测与技术应用示范二级子项目(编号:121201004000172201-2)和中国核工业地质局铀矿勘查子项目(编号:2020-10-9)联合资助. （编号:121201004000172201-2）
