水文地质概化模型与铀成矿关系探讨——以伊犁盆地南缘铀矿田为例

伊犁盆地南缘铀矿田地下水是铀元素的主要载体及控制因素,前期认为构造均为单斜构造,研究区内新发现5条近NS向逆断层,将研究区分割为6个水文地质单元,因水动力差异,铀成矿作用相差较大。依据含矿含水层的补、隔、排条件及水动力变化情况,归纳总结了狭窄集中型、中间型、宽缓敞开型3类水文地质模型,结合铀矿床规模,得出狭窄型有利于成富大矿体,宽缓敞开型不利于形成工业铀矿体的结论。

Study on the Relationship Between Hydrogeological Models with Uranium Mineralization,Take Uranium of Northern Ili Basin as an Example

The groundwater of uranium ore field is main carrier for uranium element and is the controlling factor for uranium enrichment in the southern margin of Yili Basin.The tectonic framework is used to be monoclinic structure. Recent studies discover five near north-south trending reverse fault in the study area,this area is divided into six hydrogeological units.There are great differences in uranium mineralization because of the different hydrodynamic conditions.In order to study the relationship between hydrogeological model and uranium mineralization,the author summarizes three types of hydrogeological models: narrow-concentrated,intermediate and wide-open,according to the conditions of filling, separating, draining and hydrodynamic variation of ore-bearing aquifers.Combined with uranium deposit scale,the conclusion is that the narrow type is favorable for the formation of rich ore bodies,and the wide-open type is not conducive to the formation of industrial uranium ore bodies.