| 长江口及邻近陆架沉积物中Pt、Pd分异的物源示踪 |
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| 引用本文： | 张霄宇,张富元,高爱根,章伟艳.长江口及邻近陆架沉积物中Pt、Pd分异的物源示踪[J].地球科学,2009,34(4):604-612. |
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| 作者姓名： | 张霄宇 张富元 高爱根 章伟艳 |
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| 作者单位： | 1.浙江大学地球科学系, 浙江杭州 310027 |
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| 基金项目： | 国家科学技术部科技基础性工作专项(No.2006FY220400);;国家自然科学基金青年基金项目(No.40706057);;浙江省自然科学基金项目(No.Y506205) |
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| 摘 要： | Pt/Pd比值在研究区分布呈显著的区域特征.南黄海沿岸流输送物质以Pt/Pd > 1为特征, 为古黄河三角洲来源; 长江流域来源物质以Pt/Pd≤1为特征.长江物源组分的影响范围广, 在125°E、33°N沉积物中还能发现受长江物质的明显影响.除了源岩中Pt、Pd分配因素外, 黄河和长江流域不同类型和程度的风化作用对沉积物中Pt、Pd分异起着关键的控制作用.虽然沉积物中氯含量、粒度效应在一定程度上影响着Pt、Pd分布, 但是没有造成显著的Pt、Pd分馏.Pt/Pd≤1区域中元素组成和长江沉积物的组成特征一致, 呈现比较强的硅质风化作用; Pt/Pd > 1区域沉积物中的元素组成和黄河沉积物一致, K/Na-Rb/Sr图解显示古黄河物质在再侵蚀、搬运和沉积过程中化学成分进一步分异.
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| 关 键 词： | 黄海东海陆架 沉积物 铂族元素 Pt/Pd 物源示踪 沉积学 |
| 收稿时间： | 2008-06-03 |
Source Tracing Implication of Pt and Pd Fractionation in the Surface Sediment of Continental Shelf around Changjiang Estuary |
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| ZHANG Xiao-yu,ZHANG Fu-yuan,GAO Ai-gen,ZHANG Wei-yan.Source Tracing Implication of Pt and Pd Fractionation in the Surface Sediment of Continental Shelf around Changjiang Estuary[J].Earth Science-Journal of China University of Geosciences,2009,34(4):604-612. |
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| Authors: | ZHANG Xiao-yu ZHANG Fu-yuan GAO Ai-gen ZHANG Wei-yan |
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| Institution: | ZHANG Xiao-yu1,ZHANG Fu-yuan2,GAO Ai-gen2,ZHANG Wei-yan21.Department of Earth Sciences,Zhejiang University,Hangzhou 310027,China 2.Key Laboratory of Submarine Geoscience,State Oceanic Administration,Hangzhou 310012,China |
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| Abstract: | Over the past decades extensive studies on the sediment source tracing and transporting routine of Yellow Sea and East China Sea have been carried out but not yet resolved completely.The present research suggests Pt/Pd ratio is a promising index to distinguish sediments transported from Changjiang and those from Huanghe drainage basins.The erosive sediment of old Huanghe Delta transported by southern Yellow Sea coastal current is characterized by Pt/Pd>1;land source sediment carried by Changjiang River was ... |
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| Keywords: | Yellow Sea and East China Sea sediment PGE Pt/Pd source tracing sedimentology |
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