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《Earth Science(Journal of China University of Geosciences)》 2013-01
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REE Compositions of the“Wushan Loess”and Its Origin

ZHANG Yu-fen 1,LI Chang-an 2,3,SHAO Lei 3,ZHOU Yao 1,LIU Yin-di 3 1.Institute of Geophysics and Geomatic,China University of Geosciences,Wuhan 430074,China 2.State Key Laboratory of Biogeology and Environmental Geology,China University of Geosciences,Wuhan 430074,China 3.Faculty of Earth Sciences,China University of Geosciences,Wuhan 430074,China  
The rare earth element(REE)compositions of the"Wushan Loess"are studied in order to encipher information on the genesis of the"Wushan Loess".The REE patterns,concentrations and indices are used for the discussion.The results show that REE compositions of the"Wushan Loess"are quite different from those of the modern river sediments and similar to those of the Loess Plateau and the"Xiashu Loess"in the middle and lower Yangtze reaches.REE distribution patterns are similar to those of the typical eolian deposits.The index(PI)calculated by source discriminant function is similar to those of the eolian deposits,indicating the eolian origin.The average REE content(216.39×10-6)is significantly higher to the average rate of the earth crust(178.0×10-6),two samples from the Loess Plateau(178.22×10-6),and fairly close to the average rate of the samples from the Xiashu loess in the middle and lower Yangtze reaches(207.7×10-6).The light rare earth element(LREE)are relatively enriched,while the heavy rear earth element(HREE)are slightly missing.The ratios of LREE and HREE is 8.62.The element Eu negative anomaly is obvious;while the element Ce anomaly is not obvious.It indicates that"Wushan"loess has suffered more intense weathering than the Loess Plateau.The"Wushan Loess"formed under the same weathering conditions as the"Xiashu Loess".
【Fund】: 国家自然科学基金(Nos.40971008 40771213);; 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室开放基金(No.SKLLQG0908)联合资助
【CateGory Index】: P642.131
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