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- Title
银额盆地赛尔亥那地区铀矿化特征及成因研究.
- Authors
李伟涛; 刘武生; 纪宏伟; 李子颖; 牛霆; 罗森森; 杨喆
- Abstract
The early surface uranium mineralization zone discovered in the Saierhaina area of Yin’e Basin was initially believed to be sandstone-type formed by groundwater or interlayer oxidation. This study revealed the ore host rocks are dolomitic phosphatic rock and phosphatic siltstone. The ores contain a large amount of microcrystalline apatite (francolite) which was identified as carbon-fluorine apatite by electron probe and laser ablation techniques and occured as microcrystalline aggregates (<1μm) in form. Whole-rock major and trace element analysis showed a good positive correlation between uranium content and P, Ca content, while the in-situ analysis (LA-ICP-MS) of apatite indicated a positive correlation between uranium content and P, Ca, REE, and other elements. No uranium minerals were found through high-resolution scanning electron microscope, indicatting that uranium is incorporated into apatite in the form of solid solution. Lithology and lithofacies, in-situ trace element composition and rare earth element characteristics of apatite and genesis of associated minerals showed that the uranium-rich apatite was formed during the diagenesis process under the influence of microbial activity. Therefore, the uranium exploration in Saierhaina area should pay attention to the mineralization of both phreatic-interlayer oxidation and sedimentary diagenesis.
- Publication
Uranium Geology, 2024, Vol 40, Issue 1, p143
- ISSN
1000-0658
- Publication type
Article
- DOI
10.3969/j.issn.1000-0658.2024.40.012