准噶尔盆地西北部中新生代地层铀矿成矿能力探讨

研究表明，有机质(Cy)、黄铁矿(FeS2)、氧化镁(MgO)、磷酸盐(P2O5)、三氧化二铁(Fe2O3)、氧化亚铁(FeO)和Fe^3 ，Fe^2 等参数在可地浸砂岩型铀矿形成演化过程中起到重要作用。本文主要通过准噶尔盆地西北部找矿目的层中原生带砂岩体与邻区伊犁盆地南缘512矿床砂岩层原生带砂体中上述参数对比分析，发现准噶尔盆地西北部原生带砂岩成矿能力存在明显的先天不足。分析表明，沉积相和沉积环境是造成上述参数差异悬殊的原因，进而指出了该区内今后的找矿方向。

POTENTIAL OF URANIUM MINERALIZATION IN MESO-CENOZOIC STRATA IN THE NORTHWESTERN JUNGGAR BASIN

Parameters of organic matter(Cy),pyrite(FeS₂),magnesia (MgO),phosphate(P₂O₅),iron oxide(Fe₂O₃,FeO) and Fe³⁺/Fe²⁺ play an important role in the formation of in-situ leachable sandstone-type uranium deposits.Comparative study of parameters of sandstone of the primary zone in the ore target in the no rthwestern part of the Junggar basin and those of sandstone of the primary zone in the 512 uranium deposit on the southern margin of the Ilibasin indicates that a pronounced inherent shortage exists for the potential of uranium mineralization in the sandstone of the primary zone in the northwestern part of the Junggar basin.Changesin sedimentary facies and sedimentary environment are the cause re sponsible for the great difference in the aforesaid parameters.Additonally,the authors point to the direction in future mineral exploration in the area.