Study on Uranium Occurrence State of Sandstone-Type Uranium Deposits in HJQ Region, Ordos Basin

详细信息   

• 责任者：Ma Ye (State Key Laboratory of Continental Dynamic ; Department of Geology ; Northwest University ; Xi’an 710069 ; China) ; Wu Bolin
• 刊名：Northwestern Geology
• 出版年：2013
• 卷期：46(2)
• 关键词：铀矿 ; uranium ores ; 鄂尔多斯盆地 ; Ordos Basin
• 页码：p.141-152
• 图表：8 illus., 4 tables, 29 refs.
• 分类号：1001
• issnNo：ISSN1009-6248
• isbnNo：CN61-1149/P

摘要

 
    

     In this paper, the authors mainly studied the occurence state of Uranium in sandstone-type Uranium deposits in the Ordos Basin, using methods of electron probe, sequential extraction procedure and α-track etching. The results show that the Uranium ore is rich in coffinite, and contains very small amounts of uranothorite and brannerite, which mainly exist as adsorbed particles (1~5 μm). Part of the Uranium particles, presenting as larger microparticle assemblages, mainly exist in pyrite, chlorite, calcite and the cracks of organic matter, and a few of them appear in the cracks of quartz, limonite, mica and other minerals. α-track etching further confirms that the percentage of Uranium ore in the deposit is up to 50%, in which the dispersive adsorbed Uranium accounts for about 50%.