Abstract:Numerous basins, including superposition and craton types, occur in the Xingmeng area, North China. A series of uranium deposits have been discovered in these basins. Based on a large number of borehole data cataloging and mapping, this paper expounds the tectonic background of basin development, characteristics of basin structure, sedimentary filling, reducing medium, fluid action and uranium mineralization, and discusses the structural dynamic characteristics of uranium mineralization. On this basis, the authors propose that the uranium mineralization occurred at a specific tectonic evolution stage of the basins. The uranium rich basement strata and magmatic rocks developed in a certain geotectonic background controlling the source of ore- forming materials and creating a large- scale uranium metallogenic domain, province and belt. The basins in the Xingmeng area have developed a combination of reduction and uranium reservoirs during the rift, depression, or cratonic stage. The tectonic inversion has caused different parts of the basin to be eroded and formed the denudation windowsat the edge of the basin, swell and the junction of the sags. With denudation and uplift, the deep oil and gas, coal- derived gas, etc. migrated and escaped to the denudation uplift area. Under the redox action of uranium ore- forming fluid and reducing medium in the basin, the phreatic, phreatic- interlayer oxidation and interlayer oxidation zone were formed, and uranium ore body was formed at the same time. The types of uranium mineralization in the basin include: 1) phreatic, phreatic- interlayer and interlayer oxidation type; 2) synsedimentary- type mineralization; 3) tectonothermal event superposition mineralization; 4) multiple fluid mixing mineralization. Basis on the comprehensive studies of the tectonic evolution and uranium mineralization characteristics at the different stages, the authorshave elaborated on the geological characteristics of each basin, and the corresponding uranium metallogenic mechanism, and established the uranium metallogenic dynamic model in the Xingmeng area.