| 摘要: |
| 利用筛析—沉降法对黄河系及海河系沉积物进行了粒度特征分析，黄河系沉积物以极细砂-粗粉砂为主，分选性中等，粒度分布正偏，峰态曲线尖窄；海河系沉积物以细粉砂为主，分选性较差，粒度分布正偏，峰态曲线较平缓。通过测定黄河系及海河系沉积物不同粒级中碳酸盐的含量及各粒级碳酸盐所占全样比例，结果表明：黄河系沉积物碳酸盐平均含量为11.36%，在细砂粒级含量较高（15.24%），随粒级越细波动式降低后逐步增加，并在黏土部分富集，含量达20.67%；海河系沉积物中碳酸盐平均含量为15.05%，比黄河系略高，呈两端高中间低不对称鞍形粒级分布。黄河系与海河系碳酸盐占比均受粒度控制，对全样碳酸盐贡献最大的粒级黄河系为粗粉砂，海河系为细粉砂。黄河系全岩与马兰黄土碳酸盐含量相近，与黄渤海泥质区碳酸盐含量相当，表明黄河沉积物的主要来源是马兰黄土，黄河在沉积物搬运过程中对黄土碳酸盐含量没有明显改造，黄河沉积物黏土组分是黄渤海泥质区沉积物高碳酸盐含量的主要影响因素。 |
| 关键词: 碳酸盐 粒度分布 沉积物 黄河系 海河系 |
| DOI：10.11759/hykx20161208001 |
| 分类号:P736 |
| 基金项目:国家自然科学基金(浅海多源沉积物辨析的碎屑角闪石和石英矿物化学标型特征研究41576057) |
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| Comparative analysis of carbonate in sediments of the Yellow River Estuary and the Haihe River Estuary |
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WANG Yan-jun1,2, JIN Bing-fu1,2
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1.College of resources and environmental engineering,Ludong University;2.China
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| Abstract: |
| By using sediment sieve settlement method on the Yellow River and the Haihe River systems ,analysis the granulometric of the sediments, the sediments of the Yellow River is to very fine sand and coarse silt. The sorting is medium, the size distribution is positive skewness, kurtosis curve is narrow; the Haihe River sediments is fine silt, poor sorting and the size distribution is partial, the curve is relatively flat. By measuring the contents of carbonate in different grain sizes of the Yellow River and the Haihe River sediments and the proportion of the whole carbonate, the results show that the average content of carbonate sediments in the Yellow River is 11.36%, in the fine sand grain content is higher with an average of 15.24%, with the grain finer the fluctuation level decreased gradually increased, and enrichment in the clay part with an average of 20.67%; The average carbonate content in the Haihe River sediments is slightly higher than that in the Yellow River, which is 15.05%, Showing a low-asymmetric saddle size distribution at both ends. The proportion of carbonate in the Yellow River and the Haihe River is controlled by particle size , the coarse-grained silt of the Yellow River has the greatest contribution to the whole carbonate, and the Haihe River fine powder has the greatest contribution to the whole carbonate. The main rocks of the Yellow River are similar to the carbonate content of Malan loess, which is equivalent to the carbonate content in the muddy area of the Yellow Sea and the Bohai Sea, indicating that the main source of the Yellow River sediments is the Malan loess, The Yellow River has no obvious modification of the carbonate content in the process of sediment transport, the main influencing factors of the high carbonate content in the muddy area of the Yellow Sea are the fine elements of the Yellow River. |
| Key words: Carbonate grain size distribution sediment the Yellow River System Haihe River System |