内蒙古舍伯吐地区第三系可地浸砂岩铀成矿条件研究

舍伯吐地区位于松辽盆地西南部，主要找矿目的层为第三系。该区从区域上具有富铀基底、干旱-半干旱、沙漠-半沙漠的现代气候与地貌条件。第三系主要为河流相沉积，砂体广泛发育。砂体后生改造发育，砂岩中有机质较丰富，氧化-还原过渡带铀明显富集，发育泥-砂-泥地层结构，地下水补-径-排体系完善，这些都有利于砂岩型铀矿的形成。此外地层埋深浅，有利于地下浸出，所以该区是地浸砂岩铀成矿较有利地区，应进一步加强找矿工作。

Tertiary metallogenic conditions of in-situ leachable sandstone uranium deposit in Shebotu of Inner Monglia

Tertiary is the target layer for exploring in-situ leachable uranium deposit in Shebotu area,southwest Songliao Basin.The area has favourable regional metallogenic setting for sandstone uranium deposit.i.e uranium-rich basement,with arid to semiarid climate and desert to semiarid morphologic .Meanwhile,the Tertiary is also favourable for sandstone uranium mineralization. The Tertiary mainly belongs to fluvial deposit where sandstone bodies develop extensively. Epigenetic alteration developed in sandstone bodies and organic matter exists in sandstone.Uranium enriched in oxidation reduction transition zone.Alimentation-runoff-outflow system in underground water and mudsandstone-mud layer structure are well delevoped .Therefore this area is prospect for in-situ leachable uranium exploration.