The Geological Setting for the Formation of Rich Uranium Ores in Zhuguang-Guidong Large-scale Uranium Metallogenetic Area

Zhuguang-Guidong area, located in the middle part of Nanling, the bordering region of Hunan, Guangdong, Jiangxi and Guangxi Provinces, is the most important large-uranium-ore-concentrated area of granite type in China. Dozens of granite type uranium deposits have been proved in this area, especially in the Southern Part of Zhuguang Rock Mass and the Eastern Part of Guidong Rock Mass. The formation of rich uranium ore deposits in this area is closely related with the very favourable geological setting which includes the uranium-rich old landmass, deep-seated structures, intensive abyssal magamatic activities, tectonic settings of extension transformed from compression, uranium-rich sedimentary formations and rock masses, superimposed multi-stage hydrothermal alterations, radioactive element migrations, and the favourable reducing and closed geological environments. The relatively clustered distribution of uranium deposits in Zhuguang and Guidong rock masses and the very favorable geological setting for uranium mineralizations suggest that the Zhuguang-Guidong area and probably some other areas having similar geological settings in the whole Nanling region are the target area for rich and giant blind ore deposits.