| 黄河三角洲滨海湿地表层土壤稀土元素分布特征 |
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| 关键词:Yellow River delta wetland surface soil REE |
| 基金项目:国土资源部海洋油气资源和环境地质重点实验室开放基金项目(编号:MRE200803); 国家自然科学基金项目(编号:40642009) |
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| 摘要: |
| REE Distribution Characteristics of Coastal Wetlands Surface Soil from the Yellow River Delta |
| This paper has studied REE distribution characteristics and ecological effects of 49 surface soil samples collected from the coastal wetlands of Yellow River Delta. The results indicate that REE contents in surface soil of this area range from 143.14 to 251.78 mg/kg,with an average of 182.98 mg/kg. The fractionation degree of the REE is lower than that of the Yellow River drainage area and the Yangtze River drainage area. δEu and δCe are also different from those in sediments of the above two areas. Chondrite-normalized and NASC-normalized patterns of REE show that sediments of the study area have the same fractionation pattern as sediments of the Yellow River drainage area. Nevertheless, REE contents, especially HREE contents,in surface soil sediments of this area are higher than those in the Yellow River drainage area. In different vegetation areas,the average content of ΣREE and LREE is in order of common reed < bare < Chinese Tamarisk < seablite, the average content of HREE is common reed < seablite < Chinese Tamarisk < bare, and the fractionation degree of REE is common reed < bare < Chinese Tamarisk < seablite. The average values of δEu and δCe in reed area sediments are also relatively lower. The authors thus consider that the REE might have taken a more important part in geochemical cycle in common reed land than in other places. |
| PANG Shou-ji,YE Si-yuan,SU Xin,ZHAO Guang-ming.2008.REE Distribution Characteristics of Coastal Wetlands Surface Soil from the Yellow River Delta[J].Acta Geoscientica Sinica,29(5):607-612. |
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