潮水盆地层间氧化带砂岩型铀矿成矿前景分析

Study on Uranium Deposit Metallogenic Prospecting of Interlayer Oxidation Zone in Chaoshui Basin

潮水盆地是河西走廊北侧阿拉善台隆中部的中新生代伸展断陷盆地。通过对盆地侏罗系、白垩系和新近系等主要找矿目的层特征、构造样式、层间氧化带发育特征的详细阐述,探讨了潮水盆地铀矿成矿前景。分析认为,潮水盆地侏罗系受构造和火山热改造作用,找矿范围非常局限,白垩系在平易—大红山地段存在有利的找矿目的层段,是找矿的突破口,而新近系有待探索。

Chaoshui basin situated in the middle of Alxa uplift region of north of Gansu Corridor is a meso-cenozoic downfaulted basin. Through studying on stratigraphic condition, structure styles and development of interlayer oxidation zone of main goal layer at Jurassic, Cretaceous and Tertiary. The author discussed uranium deposit metallogenic prospecting of interlayer oxidation zone, and think that prospecting range at Jurassic was limited because of structure and volcanogenic hydrothermal transformation. There is advantageous goal layer at Cretaceous in Pingyi-Dahongshan region, which is the breach of exploration, and Tertiary remains to be explored.