在野外深探槽精细解剖基础上 ,结合浅钻井、测井及室内分析化验等资料 ,根据地貌特征、沉积物类型、沉积构造、粒度分布、测井曲线形态 ,将嫩江现代河流沉积划分为辫状河的砾质坝、溢岸、河间沼泽微相及曲流河的点坝、天然堤、决口扇和河漫滩微相 .该河流沉积体是由粗粒的辫状河沉积旋回和以细粒沉积为主的低能曲流河沉积旋回叠覆构成 . Based on the fine anatomy of deep exploration trenches in the wild, combined with the data of shallow drilling, well logging and laboratory analysis and other data, according to the geomorphic features, sediment types, sedimentary structures, grain size distribution and logging curve morphology, River gravels, overflow banks, inter-river swamps, point dam of meandering river, natural dike, rift fan and floodplain microfacies.The fluvial deposits are formed by the deposition of coarse-grained braided rivers, Sedimentary superimposition of low-energy meandering stream sediments dominated by sediments.