二连盆地巴彦乌拉矿床辫状河砂体赋矿规律  

Braided river sandstone-body ore-bearing law of Bayanwula uranium deposit in Erlian Basin

作　　者：戴明建[1,2] 何万双[3] 彭云彪 苗爱生 杨建新 申科峰 刘璐 

机构地区：[1]中国地质大学(武汉)资源学院,湖北武汉430074 [2]核工业二〇八大队,内蒙古包头014010 [3]中国人民解放军66259部队,内蒙古呼和浩特010051

出　　处：《湖南科技大学学报（自然科学版）》2016年第2期19-24,共6页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：中国地调局重点资助项目(1212011085514)

摘　　要：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.Based on the theory of fluvial sedimentology, high resolution sequence stratigraphy, and hydrogenic uranium metallogenesis,together with the core and logging data,the braided river faces were disscussed in detail that of upper member of Saihan Formation of Lower Cretaceous（K1s^2）. Analysis of vertical and horizontal distribution and genetic feature of braided river sandstone controlled by the base level cycle was made. It was concluded on braided river sandstone ore-bearing law of Bayanwula uranium deposit.Furthermore,the point bar ore-bearing model was build. Consequently,ore body was mainly in the point bar sandstone,which was formed under low capacity space condation,and in the meeting of braided river and point bar in Bayanwula uranium deposit. It was significant for perphery prospecting in Bayanwula deposit and paleo-valley type uranium prospecting in other area.

关 键 词：辫状河 高分辨率层序 赋矿规律 巴彦乌拉 赛汉组 

分 类 号：P619.14[天文地球—矿床学]