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首页> 外文期刊>Journal of oceanography >Geochemical investigation of selected elements in coastal and riverine sediments from Ube, Kasado, and Suo-Oshima Bays in the western Seto Inland Sea, Southwest Japan
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Geochemical investigation of selected elements in coastal and riverine sediments from Ube, Kasado, and Suo-Oshima Bays in the western Seto Inland Sea, Southwest Japan

机译：日本西南濑户内海宇部，卡萨多和索大岛湾沿海和河流沉积物中某些元素的地球化学研究

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This paper presents the geochemical study of sediments along Ube, Suo-Oshima, and Kasado Bays in the Seto Inland Sea of Japan. We examined the distribution and abundances of 13 elements (As, Pb, Zn, Cu, Ni, Cr, Sr, Ca, Fe, Ti, P, Mn, and total S) in 40 coastal and river sediment samples, to evaluate the factors controlling their abundances, possible sources, and environmental implications. Average concentrations of As, Pb, Zn, Cu, Ni, and Cr at Ube were 12, 26, 86, 16, 43, and 92?mg/kg, 6, 25, 31, 8, 9, and 29?mg/kg at Kasado, and 5, 20, 28, 3, 5, and 18?mg/kg at Suo-Oshima, respectively. Average As, Pb, Zn, and Cr concentrations at Ube were comparable or enriched relative to those of the upper continental crust and Japan upper crust, whereas most major elements, Cu, and Ni were depleted at Kasado and Suo-Oshima. Enrichment factor values show low to moderate enrichment of Zn, Ni, and Cr, whereas As and Pb show significant contamination at some sites, suggesting contributions from anthropogenic sources. Anthropogenic contributions of most metals mainly originate from natural processes; however, As and Pb ranges of 73–79 and 66–81?%, respectively, confirm their anthropogenic contribution. Factor analysis and correlation matrices suggest that elevated metal concentrations at Ube, especially in samples located in the river basin, may be controlled by Fe–Mn oxy-hydroxides. Deposition of metals at Kasado and Suo-Oshima might be controlled by non-ferrous metal (i.e., aluminosilicates), sediment grain size, or source rock composition (granite and gneiss).
机译：本文介绍了日本濑户内海宇部，Su大岛和卡萨多湾沿岸沉积物的地球化学研究。我们检查了40个沿海和河流沉积物中的13种元素（砷，铅，锌，铜，镍，铬，锶，钙，铁，钛，磷，锰和总硫）的分布和丰度，以评估这些因素控制其含量，可能的来源和对环境的影响。 Ube的As，Pb，Zn，Cu，Ni和Cr的平均浓度分别为12、26、86、16、43和92？mg / kg，6、25、31、8、9和29？mg / kg在卡萨多（Kasado）的最大重量分别为5和20、28、3、5和18微克/千克。宇部地区的平均砷，铅，锌和铬的含量与上地壳和日本上地壳的含量相当或丰富，而在卡萨多和and大岛，大多数主要元素铜和镍被消耗掉。富集因子值显示锌，镍和铬的富集程度从中到低，而砷和铅在某些位置显示出明显的污染，表明人为来源的贡献。大多数金属的人为贡献主要来自自然过程。然而，砷和铅的范围分别为73-79％和66-81％，证实了它们的人为贡献。因子分析和相关矩阵表明，尤贝河地区的金属浓度升高，特别是位于流域的样品中，可能受Fe-Mn羟基氧化物控制。 Kasado和Suo-Oshima的金属沉积可能受有色金属（即硅铝酸盐），沉积物粒度或烃源岩成分（花岗岩和片麻岩）的控制。

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