| 武汉东湖现代沉积物磁组构特征及意义 |
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| 引用本文： | 李晓,龙昱,申燕萍.武汉东湖现代沉积物磁组构特征及意义[J].世界地质,2002,21(3):223-227. |
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| 作者姓名： | 李晓 龙昱 申燕萍 |
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| 作者单位： | 中国地质大学,地球科学学院,湖北,武汉,430074 |
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| 基金项目： | 国家自然科学基金资助项目 (49872 0 90环境部分 ) |
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| 摘 要： | 采自武汉东湖现代沉积物的0．86m长的样品被用于研究湖泊现代沉积物的磁性各向异性，研究发现，东湖的现代沉积可划分为3个阶段，不同阶段的沉积特征与磁学性质反映了不同的沉积环境物源差异，通过分析样品沉积特征，磁化率K值特征并结合磁性矿物在各层面间的差别，从而分析得出磁化率K值可作为地层划分的有效辅助手段，磁铁矿广泛存在于所有砂质及泥质沉积物中，是引起东湖现代沉积物磁化率变化的主导性物质。
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| 关 键 词： | 东湖 湖泊沉积物 磁化率 武汉市 各向异性 沉积环境 |
| 文章编号： | 1004-5589(2002)03-0223-05 |
Characteristics of Magnetic Fabrics of Recent Sediments in the East Lake, Wuhan |
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| LI Xiao,LONG Yu,SHEN Yan ping.Characteristics of Magnetic Fabrics of Recent Sediments in the East Lake, Wuhan[J].World Geology,2002,21(3):223-227. |
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| Authors: | LI Xiao LONG Yu SHEN Yan ping |
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| Abstract: | A recent sediment section 0.86m long if from the East Lake in Wuhan City, was used to study the magnetic anisotropy of lacustrine recent sediments. The results show that the recent sediments of East Lake can be divided into three phases, the characteristics of sediments and magnetic anisotropy in different phases reflect the different sediment condition. Through synthetical analysing the sedimentary characteristics and magnetic susceptibility and the difference of magnetic mineral in different phases, we found that they have the same variational characteristics. So it indicates that the characteristic of magnetic anisotropy is an effective assistant means for partition stratums. Based on these research works, we also found that the magnetite exist in every deposit phases, it is the main contributor caused the change of magnetic susceptibility. |
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| Keywords: | East Lake lacustrine sediment magnetic susceptibility |
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