摘要
对广东8种不同母质来源的土壤样品中的稀土元素含量及分布特征进行了研究,结果表明,除了砂岩外,其余母质上发育的红壤稀土元素总量都低于中国土壤平均含量,其中又以Q2粉砂岩、Q1砂岩、老红沙3种母质的红壤表现最为突出。除了铥、镥和铈外,11种稀土元素的平均含量都低于中国土壤平均含量。广东红壤轻组镧系元素(LREE)和重组镧系元素(HREE)的比值较大,其平均值为15.6。各母质土壤中的Eu表现出明显的负异常,δEu值与中国土壤平均值相接近;而Ce表现出明显的正异常,δCe平均值为1.48,明显高于中国土壤平均值。偶数稀土元素含量均明显高出奇数稀土元素。广东红壤中稀土元素的含量分布受母质、成土过程和外部环境等因素的影响。
This paper investigated the concentration and distribution characteristic of the rare earth elements （REE） in red soils derived from different kinds of parent materials on the Guangdong province. The result indicated that the concentrations of the REEs in red soft were lower than the china soil background value except soft derived from sandstones. It was most obvious in Q2 siltstone, Q1 sandstones and Q3 eolian sand. The average contents of rare earth elements except Tin, La and Ce in red soil were lower than the average value of Chinese soil. The average ratio of ∑REE to ∑HREE was 15.6. Eu showed obvious negative anomaly. δEu value was close to Chinese soil. But Ce showed positive anomaly, the average value of δCe was 1.48, which was distinctly higher than that of Chinese soils. The contents of rare earth elements with even atomic number were higher than those with odd atomic number. The major factors which influence the contents and distribution of rare earth elements in red soil include patent materials, soil forming, weathering and external environment.
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2007年第1期18-21,40,共5页
Soil and Fertilizer Sciences in China
基金
国家重大基础研究前期研究专项(2003CCA00100)
国家基金重点项目(40331009
40072-57)
中科院广州地化所创新项目(GIGCX-03-05
GIGCX-04-01)联合资助
关键词
红壤
稀土元素
广东
red soil
rare earth element
Guangdong province
