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根据滦河下游的野外调查,我们对十五种河流沉积构造作了描述,并对其形成过程作了探讨.在每个沉积旋回中,单个沉积构造只反映水动力的局部作用,垂直层序上沉积构造的组合才反映沉积期间的全部动力条件,因此,沉积构造组合是解释沉积环境的关键。层理构造是沉积物中最常见、最易直接观察的现象,是沉积物固有的特征。层理构造是动力作用的直接产物,又异常灵敏地反映动力条件的变化,因此,研究沉积构造能为判别沉积环境提供重要依据。滦河下游地区有许多人工剖面和天然露头,较系统地揭示了河流沉积构造,为研究工作提供了有利条件.本文旨在分析滦河层理构造的类型和组合,以阐明其在判别沉积环境中的意义。
According to the field investigation in the lower reaches of the Luanhe River, we have described the sedimentary structures of fifteen rivers and discussed the formation process of them. In each sedimentary cycle, the single sedimentary structures only reflect the local action of hydrodynamics, and the vertical sequence The combination of the upper sedimentary structures reflects all the dynamic conditions during the deposition. Therefore, the sedimentary assemblage is the key to explain the sedimentary environment. Tissue structure is the most common sediment, the most direct observation of the phenomenon, is the inherent characteristics of sediments. Laminar structure is the direct product of dynamic action, and abnormal dynamic changes of dynamic conditions. Therefore, the study of sedimentary structure can provide an important basis for the determination of sedimentary environment. There are many artificial profiles and natural outcrops in the lower reaches of the Luanhe River, revealing systematically the river sedimentary structures and providing favorable conditions for the research work.This paper aims to analyze the types and combinations of the Luanhe layering structures in order to clarify its role in distinguishing sedimentary environment In the meaning.