Geological characteristics and formation process of the Baquan cryptoexplosive breccia-type uranium ore deposit in Xiangshan, Jiangxi

With the Baquan cryptoexplosive breccia-type uranium ore deposit as an objective, we summarize geological background and geological characteristics of the deposit, and discuss the formation process of cryptoexplosive breccia and uranium deposit. Constrained by its volcanic edifice, diagenetic mineralization is closely related to subvolcano and volcanism. It can be inferred that uranium mineralization is spatially and temporally related to and controlled by the cryptoexplosive breccia, and occurs mainly in pipes and fractures close to contact zones. Uranium mineralization couples with pipe range and morphology and orebodies have the same occurrence as pipes. The enrichment degree of uranium mineralization is closely related to the size of the breccias, the smaller breciccas, the higher mineralization. On the other hand, uranium mineralization also shows regular changes in vertical and horizontal directions, with ore grade decreasing gradually from center to edge and from top to bottom of the cryptoexplosive breccia(pipes).