华东师范大学学报(自然科学版) ›› 2011, Vol. 2011 ›› Issue (2): 99-107，.

• 环境工程 地理学 • 上一篇    下一篇

嘉陵江三大水系边滩沉积物磁性特征及其物源指示意义

罗 艺1, 张卫国1, 刘 莹1, 刘 园2   

  1. 1. 华东师范大学 河口海岸学国家重点实验室,上海 200062;  2. 华东师范大学 资源与环境科学学院,上海 200062
  • 收稿日期:2010-03-01 修回日期:2010-06-01 出版日期:2011-03-25 发布日期:2011-03-25
  • 通讯作者: 张卫国

Magnetic properties of sediments from the major tributaries of the Jialing River and their implications for provenance identification

LUO Yi1, ZHANG Wei-guo1, LIU Ying1, LIU Yuan2   

  1. 1. State Key Laoratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China; 2. School of Resources and Environment Science, East China Normal University, Shanghai 200062, China
  • Received:2010-03-01 Revised:2010-06-01 Online:2011-03-25 Published:2011-03-25
  • Contact: ZHANG Wei-guo

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摘要： 通过2009年夏季采集的嘉陵江三大水系边滩沉积物样品的磁性测量，结合粒度分析，探讨了三江沉积物磁学特征的差异.结果表明，三大水系沉积物中磁性矿物除磁铁矿外，还含有丰富的赤铁矿，反映了四川盆地中生代紫色砂页岩作为嘉陵江水系泥沙来源的特点.嘉陵江干流由于上游黄土的输入，其磁铁矿对样品磁性特征的贡献最为显著.磁性参数χ，SIRM和S-300的组合，可将三江沉积物有效区分.

关键词: 磁性特征, 粒度, 物源, 嘉陵江, 磁性特征, 粒度, 物源, 嘉陵江

Abstract: Magnetic measurements and particle size analysis were carried out on samples collected from the tributaries in summer of 2009, with the purpose to recognize the difference in magnetic properties among them. The results indicate that the magnetic properties of the sediments are dominated by both magnetite and hematite, which reflects the fluvial input from Mesozoic red beds widely distributed in Sichuan Basin. Sediments from the main stream of Jialing River are characterized by higher proportions of magnetite due to loess input in the upper reach. A combination of magnetic parameters of χ, SIRM and S-300 can discriminate the sediments from the three tributaries very well.

Key words: particle size, sediment provenance, Jialing River, magnetic properties, particle size, sediment provenance, Jialing River

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