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应用系统聚类分析和因子分析的方法对台湾海峡283个表层沉积物样品的粒度组成和85个样品的矿物组成进行了分析,结果表明:台湾海峡表层沉积物由6种沉积物类型组成,可以划分把它们为3种与沉积动力相对应的主要沉积环境区;在表层沉积物共发现碎屑矿物61种,以轻组分矿物为主,平均含量高达97.73%,共发现轻矿物14种;重组分矿物含量较低,平均为2.27%,共发现47种重矿物。影响台湾海峡表层沉积物矿物分布及含量变化的最重要因素是物质来源,其次是水动力条件以及矿物自身的变质程度等。台湾海峡表层沉积物的主要物质来源包括来自福建和台湾省河流的入海泥沙、海峡两岸的侵蚀和剥蚀物质、韩江及部分来自浙闽沿岸流携带的长江和钱塘江物质,台湾海峡晚更新世残留物及部分自生矿物等。
The particle size distribution of 283 surface sediment samples in the Taiwan Strait and the mineral composition of 85 samples were analyzed by means of cluster analysis and factor analysis. The results show that the surface sediments in the Taiwan Strait are composed of 6 sediment types, Divided them into three main sedimentary environment zones corresponding to sedimentary motivation. A total of 61 detrital minerals were found in the surface sediments, with the light fraction minerals as the main content with the average content as high as 97.73%, and 14 kinds of light minerals were found. Heavy mineral content is low, with an average of 2.27%, found a total of 47 kinds of heavy minerals. The most important factor influencing the mineral distribution and the content change of the surface sediments in the Taiwan Strait is the material source, followed by the hydrodynamic conditions and the degree of mineral metamorphism. The major material sources in the surface sediments of the Taiwan Strait include sediment entering the sea from rivers in Fujian and Taiwan, erosion and denuding substances on both sides of the Taiwan Strait, the Hanjiang River and some Yangtze and Qiantang River materials carried by the Zhejiang-Fujian coastal currents, World residue and some of the minerals and so on.