鄂尔多斯盆地东胜铀矿成矿作用研究 - 地球科学与环境学报 - 长安大学.PDF

282 Vol . 2 8No . 2 2 0 0 6 6 　Journal of Earth Sciences and Environment 　 Jun. 2 0 0 6 1 2 1 1 1 李金宝, 车　明, 李　鑫 , 李继宏, 李荣西 (1. , 710054;2. , 718500) []　、、3 。, , , 。 , , , , 。, , , , 。 [] 　;;;;;;; [] 　P619. 14　[] 　A 　[] 　1672-6561(2006)0-2 003-7 04 Preliminary Study on Metallization of Dongsheng U Ore in Ordos Basin 1 2 1 1 1 LI Jin-bao , HE Ming , LI Xin , LI J-i hong , LI Rong-xi (1. S choo l of Ear th S ciences and Resources Management, Ch ang’an University , X i’an 710054, Sh aanx i, Ch ina; 2. Fourth Oil Prod uction F actory, Changqing Oilf ield, ingbing 718500, S haanx i, China ) Abstract:This paper puts forward five mineralization elements for U ore in Dongsheng area, including structural element, formation factor, lithologic element and paleoclimate factor. Reflectance of X-ray diffraction analysis show s the U ore includes lots of calcite, and has positive correlation between feldspar and kaolinite perform uran-i um elements transported by complex uranyl carbonate (Na [UO ( O )] )in oxidation zone. When reduction 2 2 3 3 zone in acidic medium, the fragments of feldspar alter into kaolinite, separating a ion. omplex uranyl carbonate transport form oxidation zone to reduction zone, it will decomposition w hen meet many a ions, show ing the pr-e cipitation of uranium ore and calcite. The reduction function of organic substance play an important role in the precipitation of U ore. Key words:mineralization elements;kaolinite;calcite;U oxidation zone;U reduction zone;Dongsheng U depo-s it;Inner Mongolia Autonomous Region;Ordos Basin