Chen, and 5 co-authors, reported in early 2021 that the Qianjiadian uranium deposit is located in the Kailu Depression of Songliao Basin. It is a large-scale in-situ leachable uranium deposit of sandstone type and provides a typical case of the uranium deposits in the Songliao Basin. The authors analyzed the impact of oil and gas on reduction alteration, and factors including low-grade mineralization. The Qianjiadian uranium deposit is characterized as a typical roll-type deposit with interlayers in oxidized zone.
The occurrence of reductive low-permeability sandstone in uranium reservoirs controls the morphology of the uranium-rich orebody. The authors proposed that metallogenic model involving multi-stage superposition characterized by “primary sediment enrichment - interlayer oxidation - superimposed transformation”. The authors model would be helpful for formulating guidelines in the exploration for sandstone-type uranium deposits in the Songliao Basin.
The authors concluded that:
1) Qianjiadian uranium deposit in the Songliao Basin is a product of typical interlayer oxidation mineralization of roll-type.
2) The occurrence of reductive sand bodies of poor permeability in the Qianjiadian uranium reservoir determines the shape of uranium-rich orebodies at present.
3) The Qianjiadian uranium deposit is characterized by the multi-stage superposition metallogenic model of "sedimentary preconcentration - interlayer oxidation - groundwater, oil-gas and hydrothermal superimposition transformation".
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