扎河断裂对伊犁盆地南缘511矿床水文地质条件的影响

Influences of Zhahe fault on hydrogeological conditions of deposit No.511 at the southern margin of Yili Basin

断裂构造在地浸砂岩型铀矿的形成过程中既是地下水的补给区,也是地下水的排泄区。在伊犁盆地南缘511矿床内扎河断裂还具有阻挡作用,造成了断裂两侧水文地质条件的不同。通过对511矿床扎河断层东、西两盘地下水的补-径-排条件及地下水动力场的对比,认为扎河断裂是造成511矿床在断裂东、西两盘铀成矿规模和铀矿体形态存在差异的原因之一。

Fault structure can be both recharge area and discharge area of groundwater for the formation of in-situ sandstone-type uranium deposit. In addition, some faults, like Zhahe fault in deposit No.511 block the movement of groundwater and cause differences of hydrogeological conditions between the east side and the west side of Zhahe fault. Through constructing the recharge-runoff- discharge conditions and groundwater hydrodynamic field in the east side and the west side, it is considered that Zhahe fault is one of the reasons why the size of uranium ore formation and shape of uranium orebody between the east side and the west side of Zhahe fault are different.