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Geochemistry of sediments in the Northern and Central Adriatic Sea

机译：亚得里亚海北部和中部沉积物的地球化学

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Major, minor and trace elements, loss of ignition, specific surface area, quantities of calcite and dolomite, qualitative mineralogical composition, grain-size distribution and organic micropollutants (PAH, PCB, DDT) were determined on surficial marine sediments sampled during the 1990 ASCOP (Adriatic Scientific Cooperative Program) cruise. Mineralogical composition and carbonate content of the samples were found to be comparable with data previously reported in the literature, whereas geochemical composition and distribution of major, minor and trace elements for samples in international waters and in the central basin have never been reported before. The large amount of information contained in the variables of different origin has been processed by means of a comprehensive approach which establishes the relations among the components through the mathematical―statistical calculation of principal components (factors). These account for the major part of data variance loosing only marginal parts of information and are independent from the units of measure. The sample descriptors concerning natural components and contamination load are discussed by means of a statistical model based on an R-mode Factor analysis calculating four significant factors which explain 86.8% of the total variance, and represent important relationships between grain size, mineralogy, geochemistry and organic micropollutants. A description and an interpretation of factor composition is discussed on the basis of pollution inputs, basin geology and hydrodynamics. The areal distribution of the factors showed that it is the fine grain-size fraction, with oxides and hydroxides of colloidal origin, which are the main means of transport and thus the principal link between chemical, physical and granulometric elements in the Adriatic.
机译：在1990年ASCOP上对海洋表面沉积物进行了测定，确定了主要，次要和微量元素，失火，比表面积，方解石和白云石的数量，定性矿物组成，粒度分布和有机微污染物（PAH，PCB，DDT） （亚得里亚科学合作计划）巡游。发现样品的矿物学组成和碳酸盐含量可与先前文献中报道的数据相媲美，而国际水域和中部盆地中样品的地球化学组成和主要，次要和微量元素的分布却从未有过报道。不同来源变量中包含的大量信息已通过一种综合方法进行了处理，该方法通过对主成分（因子）进行数学-统计计算来建立各成分之间的关​​系。这些占数据差异的主要部分，仅丢失了信息的边缘部分，并且独立于度量单位。通过基于R-模式因子分析的统计模型，讨论了有关自然成分和污染负荷的样品描述符，该模型计算出四个重要因素，这些因素解释了总方差的86.8％，代表了粒度，矿物学，地球化学和有机微量污染物。在污染输入，流域地质和水动力的基础上，讨论了因子组成的描述和解释。这些因素的面积分布表明，这是细粒度的部分，具有胶体来源的氧化物和氢氧化物，是主要的运输方式，因此是亚得里亚海化学，物理和粒度元素之间的主要联系。

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