论文部分内容阅读
以河流沉积学、高分辨率层序地层学和水成铀矿理论为指导,充分利用钻孔岩心和测井资料,对巴彦乌拉矿床下白垩统赛汉组上段(K_1s~2)辫状河相铀储层进行了沉积微相精细研究,深入分析了受基准面旋回控制的辫状河砂体在垂向上和横向上的分布规律与成因特征,总结了巴彦乌拉矿床辫状河砂体的赋矿规律,并建立了心滩坝砂体赋矿模式.研究认为该矿床的矿体主要赋存于低可容纳空间下形成的具有一定规模的心滩坝砂体内部,以及辫状河道与心滩坝交汇处,可为该矿床外围找矿,以及相似古河谷型铀矿找矿提供借鉴意义.
Guided by river sedimentology, high-resolution sequence stratigraphy and hydrothermal uranium deposit theory, taking advantage of wellbore cores and well logging data, the authors analyzed the upper braided K_1s ~ 2 of Lower Cretaceous in the Bayanula deposit The microfacies of the fluvial uranium reservoirs are studied finely. The distribution and genesis of the braided fluvial sand bodies controlled by the reference plane cycles are analyzed in vertical and horizontal directions. The characteristics of the braided river sand bodies And established the ore-dressing model of heart-beach bar sand body.The study shows that the ore body of this deposit mainly exists in a certain size of heart-bank bar sand body formed under the low-capacity space and the braided channel And the intersection of heart and dam, for the prospecting of the periphery of the deposit, as well as similar ancient valley-type uranium deposits provide reference.