Geochemical characteristics of trace elements of sandstone-type uranium deposits in the Ordos Basin

详细信息   

• 责任者：Gao ; E. G. ; He ; S. G. ; Sun ; S. C.
• 年：2011
• 作者单位：Institute of Disaster Prevention Science & Technology, Beijing, China
• 刊：Mineralogical Magazine
• 期：3

摘要

The Ordos basin is the second largest sedimentary basins in China, as called Shan-Gan-Ning basin, and its main body area is 2.5X10 (super 5) square kilometers. The Yimeng Uplift in the north, the Weibei Uplift in the south, the West Fold and Fault Belt in the west, and the Western Shanxi Flexure Belt in the east form a particular structure pattern. The Ordos basin is enriched with many energy resources and deposits [1-3], therefore, it has profound scientific sense and industrial value. Recent exploitation indicates that the sandstone-type uranium mineralization has economic value in this basin [4], it becomes the hotspot in the uranium exploration in China. High precision ICP-MS was hired to study trace elements and REE from sandstone-type uranium deposit in the Ordos Basin, Northwestern China. We focus on the mechanism of uranium enrichments so that to present basis for further exploration. Results of total REE ranges from 30.3 to 713.4mu g/g, REE distribution patterns of the sandstone-type uranium samples is light REE enriched and high REE depleted. Our study shows that high Y abundance and abnormity of Eu between 0.70 approximately 1.92. results show that U abundances are 0.73 approximately 150mu g/g showing strong correlation between U enrichments and the related elements such as Ti, V, Zr, Mo and Au. In addition, thorium enrichments in most samples are correlated with Sigma REE with some accordance of former study [5,6]. This study is supported by Teacher Foundation of China Earthquake Administration