Biogeochemistry of REE elements and tetrad effect in the soil-plant system: a study on volcanic rock covers in southernmost Brazil

Anais da Academia Brasileira de Ciências

Maria Do Carmo Lima E Cunha²  Lauro V.s. Nardi²  Ingke F. Muller¹ 

[1] ,Universidade Federal do Rio Grande do Sul Instituto de Geociências Centro de Estudos em Geoquímica e PetrologiaPorto Alegre RS ,Brasil

关键词: REE;    tetrad effect;    Schinus lentiscifolius;    southernmost Brazil;    ETR;    efeito tétrade;    Schinus lentiscifolius;    sul do Brasil;   

DOI  :  10.1590/S0001-37652012005000069

来源: SciELO

【 摘 要 】

This paper deals with the distribution of REE in rock, soil and plant in an area of monzonitic rocks from southernmost Brazil. The REE patterns in Schinus lensticifolius show a negative-Ce anomaly and a prominent tetrad effect, characterized as W-type that are not present in rock and soil samples. The REE patterns in the soils and rocks sampled are very similar and there is no fractionation of REE during the processes of soil formation. The W-type patterns are interpreted as indicating that REE were absorved by S. lentiscifolius as simple ions rather than as complex ions, or, alternatively, that the transport of REE in the plant metabolic processes was as free ions. The recognition of tetrads, either, M- or W-type patterns, is an additional tool for understanding the biogeochemistry of REE and can contribute to the study of monitoring processes of contaminated environment or to mineral prospecting.

【 授权许可】

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