二连盆地哈达图铀矿床铀成矿特征分析OA

Erlian Basin in the middle east of Inner Mongolia is a key exploration area for in-situ leachable sandstone type uranium deposits in northern China.With the innovation of prospecting theory and methods and the transformation of prospecting ideas,breakthroughs have been made in uranium exploration in Erlian Basin,especially the discovery of Hadatu uranium deposit,which has changed the prospecting model of Erlian Basin.In order to further expand the prospecting space in Hadu area,reach the bigger breakthrough in the ancient"Basaiqi"river channel from point to surface,this study made the preliminary analysis of the structural characteristics,stratigraphic characteristics,spatial distribution characteristics of sand body,characteristics of rock geochemical environment,ore body characteristics and ore characteristics of Hadatu uranium deposit.The result considered that Hadatu uranium deposit was a polygenetic sandstone type uranium deposit and the mineralization was controlled by geological factors such as discernible channel microfacies(heart beach and side beach),inversion structure,infiltration of uranium and oxygen-bearing water,underground oil and gas seepage and geochemical reduction barrier in the upper member Formation.The metallogenic ages of Hadatu uranium deposi were 66-30 Ma and 16-8 Ma respectively.