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首页> 外文期刊>Estuarine Coastal and Shelf Science >Quantitative compensation of grain-size effects in elemental concentration: A Korean coastal sediments case study
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Quantitative compensation of grain-size effects in elemental concentration: A Korean coastal sediments case study

机译：元素浓度对晶粒尺寸效应的定量补偿：韩国沿海沉积物案例研究

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摘要

Element concentrations (C-element) of the sediments in the diverse Korean coastal environments were constrained strongly by the grain-size effect (GSE), especially after compensation for metal-free carbonate and organic material contents. However, the GSE in some elements (especially metallic elements) was not completely offset by conventional Al-normalization (C-element/C-AI ratio), and further the best-fit regression lines between the concentrations of Al and elements may not be linear, but instead curved, and also cannot pass through the origin point (0, 0). The results suggest the presence of conventional GSE (primary GSE) as well as another GSE (i.e., secondary GSE), which was well supported by the factor analysis for the variable of C-element/C-AI ratios. Such primary and secondary GSEs are likely caused by physical and chemical processes, respectively, such as the quartz-dilution effect by metal-free, coarse-grained sediments and diagenetic reactions in organic-rich, fine-grained sediments. Furthermore, these GSEs in Korean coastal sediments can be quantitatively normalized by a quadratic equation: Celement = a(0).C-AI + a(1).(C-Al)(2), where a(0) and a(1) are constants for the primary and the secondary GSEs, respectively. (C) 2014 Elsevier Ltd. All rights reserved.
机译：在韩国不同沿海环境中，沉积物的元素浓度（C元素）受到粒度效应（GSE）的强烈限制，尤其是在补偿了无金属碳酸盐和有机物含量之后。但是，某些元素（尤其是金属元素）中的GSE不能完全被常规的Al-归一化（C元素/ C-AI比）所抵消，而且Al和元素的浓度之间的最佳拟合回归线可能不会线性，而是弯曲的，并且也不能通过原点（0，0）。结果表明存在常规GSE（主要GSE）以及另一个GSE（即次要GSE），C元素/ C-AI比变量的因素分析很好地支持了这一点。此类初级和次级GSE可能分别由物理和化学过程引起，例如无金属的粗粒沉积物对石英的稀释作用以及富含有机物的细粒沉积物中的成岩反应。此外，韩国沿海沉积物中的这些GSE可以通过二次方程定量归一化：Celement = a（0）.C-AI + a（1）。（C-Al）（2），其中a（0）和a（ 1）分别是主要GSE和次要GSE的常量。 （C）2014 Elsevier Ltd.保留所有权利。

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