Discussion on Metallogenic Mechanism and Mineral Characteristics of Ore-bearing Sandstone from the Zaohuohao-Nalinggou Uranium Deposit in Ordos Basin

LIU Zhengyi; LI Xide; ZHAO Xingqi; CAI Ya; WANG Mingtai; HUI Xiaochao; ZHANG Bin; ZHAO Yongan

Northwestern Geology > 2017 > 50(2): 191-206.

LIU Zhengyi, LI Xide, ZHAO Xingqi, et al. Discussion on Metallogenic Mechanism and Mineral Characteristics of Ore-bearing Sandstone from the Zaohuohao-Nalinggou Uranium Deposit in Ordos Basin[J]. Northwestern Geology, 2017, 50(2): 191-206.

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Discussion on Metallogenic Mechanism and Mineral Characteristics of Ore-bearing Sandstone from the Zaohuohao-Nalinggou Uranium Deposit in Ordos Basin

1. CNNC Key Laboratory of Uranium Resources Exploration and Evaluation Technology, Beijing Research Institute of Uranium Geology, Beijing 100029, China;
2. Petro China Qinghai Oilfield Company, Dunhuang 736202, Gansu, China;
3. Seismological Bureau of Shandong Province, Ji'nan 250014, Shandong, China

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Received Date: September 04, 2016
Revised Date: March 14, 2017
Available Online: July 28, 2022
Published Date: June 04, 2017

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Abstract

In Zaohuohao-Nalinggou area, based on the SEM (scanning electron microscope) test results of total rock and minerals for all 111 samples, XRD (X ray diffraction) and macro elements test for some samples, with the combination of knowledge of genetic mineralogy and prospecting mineralogy, the physical property, shape of clay mineral and uranium mineral, clay minerals component and pH of mineralized solution for mineralized rock and wall rock from the Lower Sub-Section of Zhiluo Formation have been analyzed.The results show that the paleo-climate variation and long-term depositional break existed in the upper Yan'an Formation have active significance for the uranium mineralization in this area, and the diagenesis and mineralization of different rock in syn-depositional stage are all favorable to uranium enrichment.In carbonate solution, reaction from U⁺⁶ to U⁺⁴ must occurs in strong reducing environment.Calcareous sandstone can be regarded as the migration pathway of mineralized solution for uranium mineralization.Mineralized sandstone, gray sandstone, green sandstone and celadon sandstone were all formed in different depositional environment.Redox transitional zone may be the most favorable place for uranium prospecting.

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Discussion on Metallogenic Mechanism and Mineral Characteristics of Ore-bearing Sandstone from the Zaohuohao-Nalinggou Uranium Deposit in Ordos Basin

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