An approach to the uranium reservoir space types in the sandstone-type uranium deposits in northern China

The sandstone-type uranium deposits or uranium mineralization were discovered in most of sedimentary basins in northern China. The authors propose, in terms of backscattered electron images analysis in this study and previous results of research concerning the uranium occurrence and uranium reservoirs in the sandstone-type uranium deposits in some sedimentary basins in northern China that the main reservoir space types in the sandstonetype uranium deposits in northern China include the primary pores (dominatedly charcoal debris), narrow or residual intergranular pores, secondary dissolution pores, intercrystal pores and microfissures. The diagenesis and postdiagenetic alteration may change the pore structures and types, and facilitate the reduction and precipitation of uranium.