| 洞庭湖地区红土微量与稀土元素地球化学特征及其环境意义 |
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| 引用本文： | MAO Long-Jiang,MO Duo-Wen,YANG Jing-Hong,SHI Chen-Xi. 洞庭湖地区红土微量与稀土元素地球化学特征及其环境意义[J]. 土壤圈, 2009, 19(5): 615-622. DOI: 10.1016/S1002-0160(09)60156-9 |
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| 作者姓名： | MAO Long-Jiang MO Duo-Wen YANG Jing-Hong SHI Chen-Xi |
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| 作者单位： | [1]College of Atmospheric Science, Nanjing University of Information Science ＆ Technology, Nanjing 210044 （China） [2]College of Urban and Environmental Sciences, Peking University, Beijing 100871 （China） [3]Department of Earth Sciences, Nanjing University, Nanjing 210093 （China） |
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| 基金项目： | China，the National Key Technology R&D Program，the National Key Basic Research Pro-gram (973 Program) of China，the National Natural Science Foundation of China |
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| 摘 要： | Trace element (TE) and rare earth element (REE) contents in red soils from the Dongting Lake area of China were determined to understanding the provenance and weathering characteristics of the red soils. The results showed similar REE distribution patterns among red soils from the Dongting Lake area, Xiashu loess from Zhenjiang, loess and the Pliocene red soil from the Loess Plateau. These patterns implied a similar provenance from dust-storms, except for red soil R5 which formed by bedrock weathering and had significant light REE (LREE) enrichment and heavy REE (HREE) depletion due to longer weathering periods and higher intensity of weathering. Trace element, especially the Rb/Sr and Li/Ba ratios, and REE, especially the LREE/HREE ratio and δEu could trace weathering intensity. Higher Rb/Sr, Li/Ba, and LREE/ HREE ratios and negative Eu anomalies were present in the red soil from the Dongting Lake area. The weathering intensity was in the decreasing order of R5 in the Dongting Lake area > red soil from the Dongting Lake area (including reticulate red soil, weak reticulate red soil, and homogeneous red soil formed by dust storms) > Xiashu loess from Zhenjiang > Loess-paleosol and Pliocene red soil from the Loess Plateau. Variations in the TE and REE contents of soil could be effectively used to study the provenance and the weathering intensity.
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| 关 键 词： | 稀土元素 洞庭湖区 元素地球化学特征 红壤 环境意义 黄土高原 风化强度 风化特征 |
| 收稿时间： | 2008-12-28 |
Geochemistry of trace and rare earth elements in red soils from the Dongting Lake area and its environmental significance |
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| MAO Long-Jiang,MO Duo-Wen,YANG Jing-Hong and SHI Chen-Xi. Geochemistry of trace and rare earth elements in red soils from the Dongting Lake area and its environmental significance[J]. Pedosphere, 2009, 19(5): 615-622. DOI: 10.1016/S1002-0160(09)60156-9 |
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| Authors: | MAO Long-Jiang MO Duo-Wen YANG Jing-Hong SHI Chen-Xi |
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| Affiliation: | aCollege of Atmospheric Science, Nanjing University of Information Science & Technology, Nanjing 210044 (China);bCollege of Urban and Environmental Sciences, Peking University, Beijing 100871 (China);cDepartment of Earth Sciences, Nanjing University, Nanjing 210093 (China) |
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| Abstract: | Trace element (TE) and rare earth element (REE) contents in red soils from the Dongting Lake area of China were determined to understanding the provenance and weathering characteristics of the red soils. The results showed similar REE distribution patterns among red soils from the Dongting Lake area, Xiashu loess from Zhenjiang, loess and Pliocene red soil from the Loess Plateau. These patterns implied a similar provenance from dust-storms, except for red soil R5 which formed by bedrock weathering and had significant light REE (LREE) enrichment and heavy REE (HREE) depletion due to longer weathering periods and higher intensity of weathering. Trace element, especially the Rb/Sr and Li/Ba ratios, and REE, especially the LREE/HREE ratio and δEu could trace weathering intensity. Higher Rb/Sr, Li/Ba, and LREE/HREE ratios and negative Eu anomalies were present in the red soils from the Dongting Lake area. The weathering intensity was in the decreasing order of R5 in the Dongting Lake area > red soils from the Dongting Lake area (including reticulate red soil, weak reticulate red soil, and homogeneous red soil formed by dust storms) > Xiashu loess from Zhenjiang > loess-paleosol and Pliocene red soil from the Loess Plateau. Variations in the TE and REE contents of soil could be effectively used to study the provenance and the weathering intensity. |
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| Keywords: | Hunan Province provenance sedimentary processes weathering intensity |
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