Sandstone-hosted roll-front uranium deposit, consisting of tabular and lensoid orebodies hosted in coarse to medium grained arkoses of the Lower to Middle Jurassic Shuixigou Group. The orebodies are up to 6 m thick and up to 500 m long. Alteration includes hematitization and limonitization and is well developed. An obvious zonation is observed downdip: (1) brown-yellowish, intensely altered sandstone, composed mainly of limonite disseminated in rock debris; (2) light yellow and variegated red coloured, weakly altered sandstone, containing hematite and goethite; (3) dark grey to greyish white mineralized sandstone, consisting of clay minerals, feldspar and quartz and containing uranium ores; and (4) unaltered sandstone, enriched in organic matter and containing unaltered low-valency iron minerals.
References:
- Zhou Weixun, Guan Taiyang, Chen Zuyi, Li Jianhong, Fan Liting, and Li Wuwei (2004): ISL-amenable sandstone-type uranium deposit: Global aspects and recent developments in China. In: Recent developments in uranium resources and production with emphasis on in situ leach mining. Int. At. Energ. Agency, IAEA-TECDOC-1396, pp. 25-47.
- Maozhong Min, Jia Chen, Jinpeng Wang, Guanhui Wei, and Fayek, M. (2005): Mineral paragenesis and textures associated with sandstone-hosted roll-front uranium deposits, NW China. Ore Geology Reviews 26, 51-69.
Mineral List:27 entries listed. 17 valid minerals.
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