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古洪水平流沉积
引用本文:杨达源,谢悦波.古洪水平流沉积[J].沉积学报,1997,15(3):29-32.
作者姓名:杨达源  谢悦波
作者单位:1 南京大学大地海洋科学系,南京 210093;
摘    要:古洪水研究依赖古洪水沉积获得古水文信息。古洪水平流沉积是古洪水泛滥于死水断面范围内形成的薄层细颗粒沉积。以长江三峡下段与黄河三门峡以下河段为例,古洪水平流沉积被掩埋保存在部分缓倾斜岸坡平台上,主要的识别标志,在沉积构造方面为发育微薄层理,末端翘起并尖灭,此外还具有特定的粒度结构以及多种重矿物的百分含量方面的特征。

关 键 词:古洪水    平流沉积
收稿时间:1996-08-30

Paleoflood Slack Water Deposits
Yang Dayuan,and Xie Yuebo.Paleoflood Slack Water Deposits[J].Acta Sedimentologica Sinica,1997,15(3):29-32.
Authors:Yang Dayuan  and Xie Yuebo
Institution:1 Dept. of Land & Ocean Science,Nanjing Univ.Nanjing 210093;2 Dept. of Hydrology & water Resources,Hehai Univ.Nanjing 210098
Abstract:Paleoflood study depends on the flood information drown from paleoflood deposits.Among those,the most valuable one is the paleoflood slack water deposit.The paleoflood slack water deposits at the down reach from the Three Gorges of Yangtze River and from the Sanmen Gorge of the Yellow River were burried and preserved on some terraces in gentle slope.They have slight stratification,which rises up at depositional termination,special grain size as well as the relative amount of every heavy mineral.The features above are also the important mark of looking for and ascertaining the paleoflood slack water deposit for paleoflood study on different reaches in different drainage areas.
Keywords:paleoflood\ slack water deposit
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