Journal of Jilin University(Earth Science Edition) ›› 2015, Vol. 45 ›› Issue (6): 1713-1721.doi: 10.13278/j.cnki.jjuese.201506113

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REE Geochemical Characteristics of Uranium Bearing Granite in Danfeng Area, North Qinling

Wang Jiangbo1,2, Lai Shaocong1, Li Weihong2, Zhao Ruyi2, Hui Zhengbu2   

  1. 1. Department of Geology, Northwest University, Xi'an 710069, China;
    2. No. 203 Research Institute, CNNC, Xianyang 712000, Shaanxi, China
  • Received:2015-02-13 Published:2015-11-26

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Abstract:

The REE geochemistry of four groups of samples (the regional stratigraphy, ore-hosting rocks, altered rocks, and uranium ores) were analyzed by using ICP-MS method to investigate the genesis of the uranium bearing granite in Danfeng area, North Qinling. The different groups of samples show significant similarity in LREE-enriched REE patterns and negative Eu anomalies. This indicates that the ore-hosting rocks and regional strata were formed in a typical island arc tectonic environment. Besides, altered rocks and uranium ores inherited abundant REE geochemical characteristics from the ore-hosting rocks. The rocks and uranium ores with narrow range of Y/Ho ratios between 25.09-33.46 were derived from the same source. In addition, uranium ores are characterized by highest ∑HREE,and HREE contents correlate positively with uranium ores grades, which is regarded as a clue to a simultaneous transportation of HREE and U.

Key words: REE, geochemistry, uranium bearing granite, Danfeng area, North Qinling

CLC Number: 

  • P595

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