Model of Inner and Outer Reductive Media Within Uranium Reservoir Sandstone of Sandstone-Type Uranium Deposits and Its Ore-Controlling Mechanism: Case Studies in Daying and Qianjiadian Uranium Deposits
Jiao Yangquan
Wu Liqun
Rong Hui
Abstract：The Daying and Qianjiadian uranium deposits,the reductive media within uranium-bearing series are divided into inner reductive media and outer reductive media according to its occurrence relationship with uranium reservoir sandstone.The assemblage of the inner and outer reductive media was in favor of the formation of the interlayer oxidation zone and continuous uranium mineralization.It is found that the interlayer oxidation within uranium reservoir sandstone was directly related with the inner reductive media and the reducibility of uranium reservoir sandstone was largely enhanced when the outer reductive media participated in the process of interlayer oxidation.The reductive media outside uranium reservoir sandstone was just as impor tant to uranium mineralization as the reductive media inside uranium reservoir sandstone.Types and abundance of the reductive media inside and outside uranium reservoir sandstone and their spatial distribution were affected by the synsedimentary palaeoclimate and depositional environment of uranium-bearing series which basically constrained the scale of interlayer oxidation zone.The desired results will be achieved during prospecting prediction for the sandstone-type uranium deposit based on evaluation of the model of the double reductive media associated with the studies of geological background and ore-controlling conditions in the uranium mineralization stage.
Keywords：reductive mediageological modeluranium reservoirsandstone-type uranium depositore deposit
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：16( 459-474 )