粒度特征分析方法在某古堆积体物质研究中的应用

Study on the Granularity Characteristic of Ancient Accumulation Matter

在野外实际调查及室内实验的基础上,主要从粒级组成和粒度曲线两方面对古堆积体物质的粒度特征进行分析研究,结果表明：（1）古堆积体物质中以粗颗粒的砾石和细颗粒的粉砂为主;（2）古堆积体固体物质频率曲线中,在0-2、5-6和7-8范围内出现峰值;古堆积体物质的累积曲线两端较陡,中间平缓,具有两个明显的拐点;根据概率曲线,古堆积体物质中滚动组分和悬浮组分含量较高。

The authors took the open country practical investigation and the room tests as foundation, and conducted the analysis rearch on the granularity characteristic of ancient accumulation matter from two aspects which is granularity rank and the granularity curve,the result shows that.. （1） the content of gravel and powder sand in the ancient accumulation matter is hight （2）in the frequency curve of the peak value appears in the scopes of 0--2,5-6 and 7-8 ; the beginnings and ends of the accumulation curve is to be steeper and middle is gentle, and appears two obvious inflection points; according to the curve of probability, the content of the rolls component and the aerosol component is higher.