The Yinma River in Jilin Province is a smaller muddy and sandy meandering river, by the fine dissection , detailed observation and researches for Dayushulin point bar, the sedimentary characteristics are summarized. And furthermore the sedimentary mechanisms of previous easy-to-confuse microfacieses such as flood plain, marginal bank and point bar are scientifically argued and demonstrated. On the basis of the above, the sedimentary microfacieses of Dayushulin point bar are divided into five types: stagnant, point bar, over bank, chute bar and over bank levee. The dissection of the modern sedimentation of Dayushulin point bar is beneficial to the recognition of the marginal bank and bar of palaeo-meandering river, and moreover it possesses important practically guiding significance for the oilfield exploration and development.%位于吉林省内的饮马河是一条较小型的现代泥砂质曲流河,通过对其中的大榆树林边滩的精细解剖、详细观察研究,总结了大榆树林边滩的沉积特征——沉积物岩性特征和沉积构造特征.对以前沉积划相时容易混淆的河漫滩微相和泛滥平原微相、边滩与点坝微相在沉积机理上进行了科学论证.在此基础上进行了沉积微组划分,大榆树林边滩可分为5种沉积微相:滞留沉积微相、点坝微相、漫滩微相、串沟坝微相和河漫堤微相.大榆树林边滩的现代沉积解剖,有利于对古代曲流河边滩点坝的识别,对指导油田勘探开发具有重要的现实意义.
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