长江口潮滩植物对沉积物铁的地球化学循环及磁性特征的影响

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长江口潮滩植物对沉积物铁的地球化学循环及磁性特征的影响

韩晓非, 张卫国, 陈满荣, 俞立中

文章导航 > 沉积学报 > 2003 > 21(3): 495-499

韩晓非, 张卫国, 陈满荣, 俞立中. 长江口潮滩植物对沉积物铁的地球化学循环及磁性特征的影响[J]. 沉积学报, 2003, 21(3): 495-499.

引用本文:

韩晓非, 张卫国, 陈满荣, 俞立中. 长江口潮滩植物对沉积物铁的地球化学循环及磁性特征的影响[J]. 沉积学报, 2003, 21(3): 495-499.

HAN Xiao-fei, ZHANG Wei-guo, CHEN Man-rong, YU Li- zhong. Influence of Plant on Geochemical Cycling of Iron and the Magnetic Properties of Intertidal Sediments in the Yangtze Estuary[J]. Acta Sedimentologica Sinica, 2003, 21(3): 495-499.

Citation:

HAN Xiao-fei, ZHANG Wei-guo, CHEN Man-rong, YU Li- zhong. Influence of Plant on Geochemical Cycling of Iron and the Magnetic Properties of Intertidal Sediments in the Yangtze Estuary[J]. Acta Sedimentologica Sinica, 2003, 21(3): 495-499.

韩晓非, 张卫国, 陈满荣, 俞立中. 长江口潮滩植物对沉积物铁的地球化学循环及磁性特征的影响[J]. 沉积学报, 2003, 21(3): 495-499.

引用本文:

韩晓非, 张卫国, 陈满荣, 俞立中. 长江口潮滩植物对沉积物铁的地球化学循环及磁性特征的影响[J]. 沉积学报, 2003, 21(3): 495-499.

HAN Xiao-fei, ZHANG Wei-guo, CHEN Man-rong, YU Li- zhong. Influence of Plant on Geochemical Cycling of Iron and the Magnetic Properties of Intertidal Sediments in the Yangtze Estuary[J]. Acta Sedimentologica Sinica, 2003, 21(3): 495-499.

Citation:

HAN Xiao-fei, ZHANG Wei-guo, CHEN Man-rong, YU Li- zhong. Influence of Plant on Geochemical Cycling of Iron and the Magnetic Properties of Intertidal Sediments in the Yangtze Estuary[J]. Acta Sedimentologica Sinica, 2003, 21(3): 495-499.

长江口潮滩植物对沉积物铁的地球化学循环及磁性特征的影响

1.
华东师范大学地理系上海 200062;
2.
华东师范大学河口海岸国家重点实验室上海 200062;
3.
扬州大学地理系江苏杨州 225009

基金项目: 国家自然科学基金项目(批准号:40131020；40001020；49871068)；教育部博士点基金项目(98026915)；上海市重点学科建设项目；上海市科委青年科技启明星项目(01QC14016)资助

作者简介:
韩晓非,女,1973年出生,博士研究生,地球化学和环境磁学

中图分类号: P736.4

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文章访问数: 524
HTML全文浏览量: 6
PDF下载量: 470
被引次数: 0

Influence of Plant on Geochemical Cycling of Iron and the Magnetic Properties of Intertidal Sediments in the Yangtze Estuary

1.
Department of Geography, East China Normal University, Shanghai 200062;
2.
State Key Laboratory of Estuarine and Coastal Research, East China Normal Uni versity, Shanghai 200062;
3.
Department of Geography, Yangzhou University, Yangzhou Jiangsu 225009

摘要: 通过长江河口高潮滩芦苇带沉积物柱状样CYLWA 1活性铁、有机质、粒度分析及磁性测量,探讨潮滩植物对沉积物铁的地球化学循环及磁性特征变化的影响。结果显示,沉积物柱状样总体上以Fe^{2 +} 占优势,且含量随深度逐渐增加。但在亚表层 (10～ 2 0cm),由于根系的释氧作用,存在着以Fe^{3 +} 占优势的氧化层。在 10～ 2 0cm这一氧化层,指示细颗粒磁性矿物的参数 (χ_fd、χ_ARM)明显减小,而反映磁性矿物类型的参数 (B_CR、SIRM/ χ)显著增大,指示了亚铁磁性矿物颗粒变粗,不完整反铁磁性矿物明显富集,这一现象反映了氧化层不完整反铁磁性矿物的相对富集
- 铁的地球化学循环 /
- 磁性特征 /
- 潮滩 /
- 长江口
Abstract: One core (CYLWA-1) from Phragrmites australis vegetated tidal flat, the Yangtz e Estuary, is selected to investigate the effect of plant on geochemical cycling o f iron and the magnetic properties of the sediments. The results show that Fe ²⁺ dominates in most layers of the sediments and increases with depth, except at a depth of 14～20 cm, where Fe³⁺ dominates due to the abundant distribution of live roots. In the oxidized layer of 14～20 cm, χ _fd, χ _ARM and χ _ARM /SIRM decline, sug gesting coarsening of ferrimagnetic minerals. On the contrary, the obvious incre ase in B _CR and SIRM/ χ indicates relative increase of imperfect an ti-ferromagneti c minerals. It is suggested that ferrimagnetic minerals be transformed into impe rfect anti-ferromagnetic iron oxides under oxidizing environment.
- geochemical cycling of iron /
- magnetic properties /
- tidal flat /
- Yangtze Estuary

参考文献(25)

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文章访问数: 524
HTML全文浏览量: 6
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长江口潮滩植物对沉积物铁的地球化学循环及磁性特征的影响

1. 华东师范大学地理系上海 200062;

2. 华东师范大学河口海岸国家重点实验室上海 200062;

3. 扬州大学地理系江苏杨州 225009

基金项目: 国家自然科学基金项目(批准号:40131020；40001020；49871068)；教育部博士点基金项目(98026915)；上海市重点学科建设项目；上海市科委青年科技启明星项目(01QC14016)资助

作者简介:
韩晓非,女,1973年出生,博士研究生,地球化学和环境磁学

收稿日期: 2002-01-04
修回日期: 2002-03-06
刊出日期: 2003-09-10

中图分类号: P736.4

关键词:

铁的地球化学循环 /

摘要: 通过长江河口高潮滩芦苇带沉积物柱状样CYLWA 1活性铁、有机质、粒度分析及磁性测量,探讨潮滩植物对沉积物铁的地球化学循环及磁性特征变化的影响。结果显示,沉积物柱状样总体上以Fe^{2 +} 占优势,且含量随深度逐渐增加。但在亚表层 (10～ 2 0cm),由于根系的释氧作用,存在着以Fe^{3 +} 占优势的氧化层。在 10～ 2 0cm这一氧化层,指示细颗粒磁性矿物的参数 (χ_fd、χ_ARM)明显减小,而反映磁性矿物类型的参数 (B_CR、SIRM/ χ)显著增大,指示了亚铁磁性矿物颗粒变粗,不完整反铁磁性矿物明显富集,这一现象反映了氧化层不完整反铁磁性矿物的相对富集

English Abstract

韩晓非, 张卫国, 陈满荣, 俞立中. 长江口潮滩植物对沉积物铁的地球化学循环及磁性特征的影响[J]. 沉积学报, 2003, 21(3): 495-499.

引用本文:

韩晓非, 张卫国, 陈满荣, 俞立中. 长江口潮滩植物对沉积物铁的地球化学循环及磁性特征的影响[J]. 沉积学报, 2003, 21(3): 495-499.

HAN Xiao-fei, ZHANG Wei-guo, CHEN Man-rong, YU Li- zhong. Influence of Plant on Geochemical Cycling of Iron and the Magnetic Properties of Intertidal Sediments in the Yangtze Estuary[J]. Acta Sedimentologica Sinica, 2003, 21(3): 495-499.

Citation:

HAN Xiao-fei, ZHANG Wei-guo, CHEN Man-rong, YU Li- zhong. Influence of Plant on Geochemical Cycling of Iron and the Magnetic Properties of Intertidal Sediments in the Yangtze Estuary[J]. Acta Sedimentologica Sinica, 2003, 21(3): 495-499.

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