Volume 25 Issue S1
May  2019
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Article Navigation >  Journal of Geomechanics  > 2019  >  25(S1): 84-89
DING Bo, LIU Hongxu, LI Ping, et al., 2019. THE TECTONIC ACTIVITY IN THE SOUTHERN MARGIN OF THE ILI BASIN AND ITS CONSTRAINT ON SANDSTONE-TYPE URANIUM DEPOSITS: EVIDENCE FROM APATITE FISSION TRACK AND U-PB DATING. Journal of Geomechanics, 25 (S1): 84-89. DOI: 10.12090/j.issn.1006-6616.2019.25.S1.015
Citation: DING Bo, LIU Hongxu, LI Ping, et al., 2019. THE TECTONIC ACTIVITY IN THE SOUTHERN MARGIN OF THE ILI BASIN AND ITS CONSTRAINT ON SANDSTONE-TYPE URANIUM DEPOSITS: EVIDENCE FROM APATITE FISSION TRACK AND U-PB DATING. Journal of Geomechanics, 25 (S1): 84-89. DOI: 10.12090/j.issn.1006-6616.2019.25.S1.015
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THE TECTONIC ACTIVITY IN THE SOUTHERN MARGIN OF THE ILI BASIN AND ITS CONSTRAINT ON SANDSTONE-TYPE URANIUM DEPOSITS: EVIDENCE FROM APATITE FISSION TRACK AND U-PB DATING

doi: 10.12090/j.issn.1006-6616.2019.25.S1.015
  • 1.

    CNNC Key Laboratory of Uranium Resources Exploration and Evaluation Techniques, Beijing 100029, China

  • 2.

    Beijing Research Institute of Uranium Geology, Beijing 100029, China

  • 3.

    Geological Party No.216, CNNC, Urumqi, Xinjiang 830011, China

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  • Published: 2019-05-01
    Abstract
  • In order to explore the relationship between the tectonic activity and uranium mineralization in the southern margin of Ili basin, the method of apatite fission track and U-Pb dating was used to ascertain the tectonic activity and metallogenic age of sandstone-type uranium deposits by adopting the sandstone sample of the ore bearing layer. The above research can draw some conclusions. Firstly, the southern margin of Ili basin experienced three periods of intense uplift and denudation, which were the late Indosinian tectonic activity from late Triassic to middle Jurassic, Yanshanian tectonic activity from late Jurassic to early Cretaceous and Himalayan period tectonic activity from Miocene to present respectively. Secondly, the metallogenic age of sandstone-type uranium deposits in the middle-west section of the southern margin of the basin can be divided into four stages: 158~153 Ma, 108~60.5 Ma, 55~15 Ma and 12~0.3 Ma, while the metallogenic age of sandstone-type uranium deposits in the east section was relatively new, ranging from 7.8 to 5.5 Ma. Thirdly, the tectonic activity and the metallogenic age of sandstone-type uranium deposits in the southern margin of the basin have a good correspondence. The process of uranium mineralization can be divided into three stages: rapid uplift of the source area-the formation stage of ore-bearing construction and the pre-enrichment stage of uranium, pre-enrichment, the primary mineralization and post-superimposition reconstruction stage.

     

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