| Distribution of Organic Matter, Iron, Mangenese in SurfaceSediments in the Nansha Islands Sea Area, South China Sea |
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| 作者姓名： | ZhouWcihua WuYunhua ChenShaoyong YinKedong |
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| 作者单位： | LED,SouthChinaSeaInstituteofOceanology,ChineseAcademyofSciences,Guangzhou510301,Guangdong,China |
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| 基金项目： | 国家自然科学基金，the Special Foundation of National Social Common Wealth Research，中国科学院科技攻关项目 |
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| 摘 要： | Concentrations of organic matter, iron and manganese in the deep sea surface sediments in the Nansha Islands sea area, South China Sea are measured, Horizontal and vertical distributions of iron and manganese are discussed. The vertical distribution of iron and manganese in the sediments results from reduction, diffusion, and redeposition of manganese (or iron) oxide and hydroxide in the sediment. There are the maxima of iron and manganese in solid phase in the top of the sediment, which is caused by the penetration of O2 and the upward flux of Mn^2 ( or Fe^2 ). Manganese bacteria play a very important role in the cycle of solid-phase iron and manganese in the ocean environment. Manganese bacteria oxidize Mn^2 ( or Fe^2 ) in dissolved state to Mn^4 ( or Fe^3 ) in oxidized state under the aerobic condition, whereas they reduce iron and manganese in anaerobic conditions.
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| 关 键 词： | 有机物质 铁 锰 表面沉积物 南沙群岛海洋区域 中国南部 海洋地球化学 |
Distribution of Organic Matter, Iron, Mangenese in Surface Sediments in the Nansha Islands Sea Area, South China Sea |
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| ZhouWcihua WuYunhua ChenShaoyong YinKedong.Distribution of Organic Matter, Iron, Mangenese in SurfaceSediments in the Nansha Islands Sea Area, South China Sea[J].Marina Science Bulletin,2003,5(2):14-21. |
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| Authors: | Zhou Weihua Wu Yunhua Chen Shaoyong Yin Kedong |
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| Abstract: | Concentrations of organic matter, iron and manganese in the deep sea surface sediments in the Nansha Islands sea area, South China Sea are measured. Horizontal and vertical distributions of iron and manganese are discussed. The vertical distribution of iron and manganese in the sediments results from reduction, diffusion, and redeposition of manganese (or iron) oxide and hydroxide in the sediment. There are the maxima of iron and manganese in solid phase in the top of the sediment, which is caused by the penetration of O2 and the upward flux of Mn2+ ( or Fe2+ ). Manganese bacteria play a very important role in the cycle of solid-phase iron and manganese in the ocean environment. Manganese bacteria oxidize Mn2+ ( or Fe2+ ) in dissolved state to Mn4+ ( or Fe3+ ) in oxidized state under the aerobic condition, whereas they reduce iron and manganese in anaerobic conditions. |
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| Keywords: | organic mater iron manganese surface sediment Nansha Islands sea area South China Sea |
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