沉积动力学若干问题的讨论

A DISCUSSION ON SEDIMENT DYNAMICS

根据沉积物的成因标志定量地重建沉积环境的动力学,是地球科学的需要,也是多少代沉积地质学家的梦想。近数十年来,沉积学家通过现代过程的观察、实验模拟和古相沉积序列的研究,探讨沉积物的粒度和沉积构造与沉积环境的动力学关系,取得了长足的进展。简要地回顾了沉积动力学的研究历史,重点讨论了沉积物的粒度和沉积底形的动力学含义,介绍了主要的研究结论。但是,无论是沉积物的粒度还是沉积构造,都是复杂的多变量函数,不可能在没有设定前提的情况下取得某一变量的单一解。沉积地球科学的性质决定了它的思维路线。沉积学家必须坚持自然现象有序性和连续性的基本原理,坚持辩证逻辑和综合分析,才能在沉积动力学研究中取得比较符合实际的科学结论。

In the past decades,sedimentologists have made great efforts to investigate the relation of the grain size and structures or bedforms of a sediment with its hydrodynamic environment through experiments,in-situ monitoring and the study of ancient sedimentary records.This paper recalled the history of sediment dynamics,and discussed the dynamic implication of grain size and structures of sediments.Grain size and structures are useful tools for environmental reconstruction.But they are both multi-variable func...