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本文对江苏北部海岸和渤海湾黄河三角洲的潮汐滩地沉积物进行了粒度分析,并把它与海滩砂加以比较,发现潮滩沉积具有其独特的粒度特征,据此可以容易地把它与其它环境的沉积区分开来。潮滩沉积物以粉砂为主,中值粒经和平均粒经主要在4—6φ之间,这两个值的频率分布曲线都呈对称状。而且潮滩沉积物表面为正偏,其SK_1值均大于0。另外,还发现潮滩沉积物中值粒经粗于平均粒经,两者差值多在0—0.2之间。
In this paper, the grain size of tidal flat sediments in the northern coast of Jiangsu and the Yellow River Delta in the Bohai Bay are analyzed and compared with the beach sand. It is found that the tidal flat sediment has its unique grain size characteristics, so that it can be easily compared with other environments The deposition of the distinction. The tidal flat sediments are dominated by silt, and the median grain size and average grain size are mainly between 4 and 6 φ. The frequency distribution curves of these two values are symmetrical. The surface of tidal flat sediment is positive and its SK_1 value is greater than 0. In addition, it is also found that the mean grain size of tidal flat sediment is larger than the average grain size, and the difference between the two is mostly between 0 and 0.2.