泉州湾表层沉积物特征分析

发布时间：2018-08-20 14:22

【摘要】：本文是根据福建省908专项《福建海湾志》编纂项目在泉州湾采集的70个表层沉积物样品,对其进行了粒度、地球化学元素和黏土矿物含量的分析,并进一步分析了泉州湾表层沉积物的粒度特征,粒径运移趋势,沉积物类型分布特征,地球化学特征,地球化学元素的粒度效应,黏土矿物的分布特征,并且潮流矢量图和粒度参数在横向上进行了定性化对比,以及诸要素与潮流水动力学之间的相关关系。研究结果表明:1、采用图解法和矩法两种分析方法,对比分析了泉州湾表层沉积物粒度参数特征,结果表明,图解法和矩法在计算沉积物粒度参数时各有其优缺点,应该在实际应用中根据需要而选择恰当的方法;根据沉积物粒度参数对采样点进行Q型聚类后和沉积物的曲线特征吻合得很好;进一步采用沉积物粒级别组分进行了R因子分析、粒径趋势运移分析了沉积物的可能输入来源;2、对于某一种粒度参数计算方法而言,不同的粒度参数,在横向上具有不同的变化特征,并且和流速矢量图进行对比后发现,受到潮流的影响比较明显,但是和涨潮落潮流速进行定量化相关性分析后,并没有得到较好的相关性;3、研究后根据谢帕德三角形分类可把泉州湾沉积物划分为四大类,平面上的分布以黏土质粉砂和砂为主,粉砂质砂和砂质粉砂仅在零星区域分布;4、沉积物粒度与大多数地球化学元素有很好的相关关系,只有少数的元素和粒度不成相关性;5、通过对比周边花岗岩中元素丰度特征,以及大陆地壳丰度,近海沉积物元素丰度,可以推断出泉州湾沉积物主要物源为周边花岗岩,并受到了其它来源的扰动;6、研究区黏土矿物以伊利石和高岭石居多,绿泥石次之,仅占有很少量的蒙脱石。
[Abstract]:This paper is based on 70 surface sediment samples collected in Quanzhou Bay by Fujian Province 908 special "Fujian Gulf Records" compilation project. The grain size, geochemical elements and clay content are analyzed. The grain size characteristics, grain size migration trend, sediment type distribution characteristics, grain size effect of geochemical elements and clay mineral distribution characteristics of surface sediments in Quanzhou Bay are further analyzed. And the horizontal comparison of power flow vector diagram and particle size parameters is carried out, and the correlation between the elements and tidal current hydrodynamics is also discussed. The results show that the diagrammatic method and moment method are used to compare and analyze the grain size parameters of surface sediment in Quanzhou Bay. The results show that the graphical method and the moment method have their own advantages and disadvantages in calculating the grain size parameters of the sediments. The appropriate method should be chosen according to the need in practical application, and the Q cluster of sampling points according to the parameters of sediment granularity is in good agreement with the curve characteristics of sediment. Furthermore, the R factor analysis of sediment grain-grade components was carried out, and the grain size trend migration was used to analyze the possible input source of sediment. For a certain method of calculating granularity parameters, different granularity parameters were obtained. After comparing with the velocity vector diagram, it is found that the influence of tidal current is obvious, but after quantitative correlation analysis with the flow velocity of high tide and ebb tide, The sediment in Quanzhou Bay can be divided into four categories according to the Sheppard triangle classification. The distribution on the plane is mainly clay silty sand and sand. Silty sand and sandy silt are only distributed in sporadic areas, and the grain size of sediment has a good correlation with most geochemical elements. Only a few elements and granularity are not related to each other. By comparing the characteristics of element abundance in the surrounding granite, As well as continental crust abundance and element abundance in offshore sediments, it can be inferred that the main source of sediments in Quanzhou Bay is peripheral granite, and has been disturbed by other sources. The clay minerals in the study area are mostly Illite and kaolinite, followed by chlorite. Only a small amount of montmorillonite is occupied.
【学位授予单位】：国家海洋局第三海洋研究所
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P736.2

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