摘要：

内蒙古东部开鲁盆地钱家店凹陷铀矿床是辽河油田在进行外围盆地油气勘探过程中发现的伴生矿床。铀矿类型为层间氧化带砂岩型铀矿床。对该区铀矿成藏条件进行研究表明：首先，具备富铀物源，铀源充足；上白垩统姚家组广泛发育的辫状河流相沉积体系，形成了渗透性砂岩、砂砾岩与隔水性泥岩稳定的互层结构，铀矿主要分布在其中的中孔、中渗砂体中；下白垩统的生、储油层，为铀矿形成提供了丰富的还原剂；产状平缓的沉积构造背景下形成的边缘相对隆起的自流汇水盆地，易使含氧含铀地下水沿砂体、不整合面向盆地内有利区补给，在氧化-还原界面附近铀沉淀成矿，为铀矿创造了进一步富集成藏的条件；预测该区铀矿资源为x×104t。

Abstract:

The uranium mineral deposit of Qianjiadian depression is the associated mineral deposit found during the oil and gas exploration of Liaohe  peripheral basin. The uranium deposit falls into the category of sandy deposit at interlayer oxidization zones. Study of the reservoir forming condition of uranium in this area shows that: first, uranium is source abundant ;  The widely developed braided channel deposit system in the Yaojia Formation of the Upper Cretaceous resulted in the interlayer structure of permeable sand, glutinite, and water impermeable mudstone with the uranium distributed in the moderate porosity and  permeability sand body; and the source and reservoir of Lower Cretaceous have provided the  rich reduction agents for the uranium mineral deposit forming; The artesian and water catch basin with relative uplift at the edges formed in the gentle occurrence deposit structure tend to make the underground water containing uranium supply the favorable area  along the sand body and unconformity surface ,  forming the uranium mineral deposit near the oxygen --reduction contact, providing the conditions for the further reservoir forming ; predict the reserve of the region of x ×104 t.