Study on  Iron Geochemical Behavior in the Interlayer Oxidation Zone Sandstonetype Uranium Metallogenetic Process: A case from  hihongtan uranium deposit in the TurpanHami Basin of Xinjiang

Key words: 
• ferrum phases /
• uranium mineralization

Abstract: As the typical interlayer oxidation zone sandstone type uranium deposit, Shihongtan uranium deposit occurs in the fluvial facies sandstone of the Xishanyao Formation of the middle Jurassic at the Aiding Lake slope in the southwest margin of TurpanHami basin. According to the results of ferrum phases analysis, the formations of iron element in the ore hosting belts include FeCO3, Fe2O3, silicatefacies iron and FeS2whose contents take regular changes in different geochemical subzone. Pyrite, the main form of ferrous iron in the ore hosting belts, has the twoperiod causes, belongs to the sulphate and microbe reducing product. The author analyzed the function of iron geochemical behavior in uranium mineralization process, thought that in the oxidized zone, the iron catalyzed uranium oxidation, dissolution and move, which provided the important source for uranium mineralization. The pyrite of ore belt played the sorption in uranium mineralization process, indicating the similar cause with the bitumionous uranium.