松辽盆地可地浸砂岩型铀矿成矿地质条件

GEOLOGICAL CONDITIONS OF URANIUM ORE FORMATION IN SONG-LIAO BASIN

本文重点讨论了松辽盆地的地质背景、铀源条件、铀矿化异常与岩相古地理以及盆地后期改造的关系，介绍了该盆地后期改造的特征、后期改造的动力条件及铀元素的再分配，探讨了铀矿化异常与复合砂体、氧化还原条件及剥蚀面的关系。在此基础上预测了铀成矿远景地区，选出找矿的重点层位。

In this paper,the relationship between the geological background,condition of uranium source, and uranium mineralization, uranium anomaly, lithofacies-paleogeography and the late-stage basin transformation are chiefly discussed. The characteristics, geodynamic conditions and redistribution of uranium during the late-stage basin transformation are presented. The relationship between uranium mineralization, uranium anomaly and compounding sandstone bodies,redox condition and erosion surface is also approached. On this basis,two uranium metallogenetic prospective areas have been predicted and two key exploration beds have been selected.