Uranium Mineral Occurrence of Sandstone-Type Uranium Deposits in the Dongsheng-Huanglong Region, <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:place w:st="on"><st1:PlaceName w:st="on">Ordos</st1:PlaceName> <st1:PlaceType w:st="on">Basin</st1:PlaceType></st1:place> <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

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Uranium Mineral Occurrence of Sandstone-Type Uranium Deposits in the Dongsheng-Huanglong Region, Ordos Basin

详细信息

责任者：Yang Xiaoyong (CAS Key Laboratory of Crust-Mantle Materials and Environments ; Research Center for Oil-Natural Gases ; School of Earth and Space Sciences ; University of Science and Technology of China ; Hefei 230026 ; China) ; Ling Mingxing
刊名：Acta Geologica Sinica
出版年：2009
卷期：83(8)
关键词：铀矿 ; uranium ores ; 鄂尔多斯盆地 ; Ordos Basin
页码：p.1167-1177
图表：6 illus., 2 tables, 59 refs.
分类号：1001
issnNo：ISSN0001-5717
isbnNo：CN11-1951/P

摘要

This paper studies mainly uranium mineral occurrence of sandstone-type uranium deposits in the Ordos Basin using high-resolution SEM and EPMA. U-bearing minerals were observed to occur and be enriched mainly in cracks or cleavages of potassic feldspar, microcline and muscovite and cement in the form of very tiny grains(<1 μm). The minerals are dominated by UO₂ grains. Analytic data show that the content of UO₂ can reach to 1%～3.46%, with lowest contents in cracks or cleavages of quartz and calcite grains. EPMA also shows that minor U-bearing minerals occur as aggregates with the largest ones up to ～200 μm. Analytical data indicate that UO₂Contents range from 0 to 3. 46%. Generally, high-U bearing minerals are also high in the contents of Th and REE.

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