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Erschienen in:
2005 | OriginalPaper | Buchkapitel
Mineralization characteristics and origin of the Qianjiadian uranium deposit
verfasst von : Shengxiang Li, Yuqi Cai, Yuliang Xia, Guangxi Ou, Jinrong Lin, Wenming Dong
Erschienen in: Mineral Deposit Research: Meeting the Global Challenge
Verlag: Springer Berlin Heidelberg
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The Qianjiadian uranium deposit occurs invariegated clastic rocks of the Upper Cretaceous Yaojia Formation. The primary color of the ore-bearing sandstone is purple to red; the ore-bearing host rocks show gray or grayish white colors due to secondary alteration of oil-gas and oil-field water. The uranium ore bodies are of tabular shape. The uranium ores have low ratios of Fe
2
O
3
/FeO and U
6+
/U
4+
, but high contents of CH
4
and total hydrocarbon. In the uranium ores, U content is positively correlated to S content and delta Eh value, and negatively correlated to pH; however, it has no evident correlation with the content of organic matter. The mixing of the infiltrating oxygen-bearing supergene water with ascending oxygen-free hypogene oil-gas and oil-field water plays a key role in forming Qianjiadiun uranium deposit.