| 东海表层沉积物黏土粒级中多态脂肪酸组成与地球化学特征 |
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| 引用本文： | 卢龙飞,蔡进功,雷天柱,郭志刚,腾格尔.东海表层沉积物黏土粒级中多态脂肪酸组成与地球化学特征[J].地球化学,2011,40(2):188-198. |
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| 作者姓名： | 卢龙飞 蔡进功 雷天柱 郭志刚 腾格尔 |
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| 作者单位： | 海洋地质国家重点实验室同济大学;中国石油化工股份有限公司石油勘探开发研究院无锡石油地质研究所;南京大学地球科学与工程学院;中国科学院地质与地球物理研究所油气资源研究中心;复旦大学环境与工程学院; |
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| 基金项目： | 国家自然科学基金(40872089); 同济大学海洋地质国家重点实验室基金(MG200902); 中国博士后科学基金(20100480496) |
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| 摘 要： | 对东海陆架泥质沉积区两个代表性站位表层沉积物开展了黏土粒级分离提取，并对其依次进行溶剂萃取、碱解和酸解处理，得到结合程度不同的三种脂肪酸组分：有机溶剂抽提的游离态脂肪酸、碱解得到的碱解酸和酸解得到的酸解酸。三种赋存态酸的存在表明它们所联结的宏观分子的结构不同或所吸附黏土矿物的保护作用不同。不同赋存态酸的数量、组成和分布有一定差异，两站位相同赋存态酸的数量与组成也存在明显差异。组成与分布特征表明东海陆架泥质区超细颗粒物中脂肪酸以海洋内源藻类来源为主（〉70％），陆源高等植物贡献相对较低，并有少量的细菌源贡献。各赋存态酸的降解程度为碱解酸高于酸解酸高于游离酸，可能与其在黏土中的赋存状态和吸附过程有关。靠近长江河口的表层沉积物样品（24站）海洋内源藻类贡献略低于远离河口的站位（30站），陆源高等植物的输入稍高于后者，是受两泥质区沉积环境综合影响的结果。
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| 关 键 词： | 脂肪酸 赋存态 黏土 表层沉积物 |
Composition and geochemical characteristics of free and bound fatty acids in clay fraction of surface sediments, East China Sea |
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| LU Long-fei,CAI Jin-gong,LEI Tian-zhu,GUO Zhi-gang,Tenger BORJIN.Composition and geochemical characteristics of free and bound fatty acids in clay fraction of surface sediments, East China Sea[J].Geochimica,2011,40(2):188-198. |
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| Authors: | LU Long-fei CAI Jin-gong LEI Tian-zhu GUO Zhi-gang Tenger BORJIN |
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| Institution: | LU Long-fei1,2,3,CAI Jin-gong1,LEI Tian-zhu4,GUO Zhi-gang5 and Tenger BORJIN2 1.State Key Laboratory of Marine Geology,Tongji University,Shanghai 200092,China,2.Wuxi Institute of Petroleum Geology,SINOPEC Exploration and Production Research Institute,Wuxi 214151,3.School of Earth Sciences and Engineering,Nanjing University,Nanjing 210093,4.Lanzhou Research Center of Petroleum Resources,Institute of Geology and Geophysics,Chinese Academy of Sciences,Lanzhou 730000,5.School of Environment an... |
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| Abstract: | Clay size fractions were separated from two representative surface sediments of mud areas of the East China Sea shelf and subjected to sequential treatments in order to obtain quantitative and qualitative information on carboxylic acid moieties.The acid moieties occurring in each sample included:(i) the free acids directly extracted by organic solvent,(ii) the OH--labile acids released by saponification and(iii) the H+-labile acids obtained via acid hydrolysis.Considerable differences were observed,for a gi... |
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| Keywords: | fatty acids occurrence clay minerals surface sediments |
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