Behavior of REEs in granitic profiles in NE and SE Tibet plateau,China
As one of the most applied tracer,behavior of REEs can record geology and geochemistry process.In this paper,two granitic regolith profiles from different climate zones in east Tibet plateau were studied.The concentration and distribution pattern reveals that 1)the ?REEs ranges from 119.65 to 275.33mg/kg in profile ND and 5.11 to 474.55 mg/kg in profile GTC.205.79 mg/kg and 161 mg/kg on average for ND and GTC,respectively.The ?REEs enriched in accumulation horizon and semiregolith; 2)Influenced by climate,the fractionation of LREEs and HREEs in profile ND and GTC varied during weahtering process.The ratio of LREEs/HREEs in pedosphere is little higher than semiregolith in tropical profile GTC; 3)Negative anomaly of Eu in both profiles is the result of bedrock weathering.Positive anomaly of Ce is observed in all layers in profile ND,and only in upper 100 cm in profile GTC.This result indicates that weathering redox condition along regolit profile in different climate veries considerably.4)Normalized by chondrite,LREEs accumulate much more than HREE,the distribution curves of REEs are right-lean and V-type Eu anomaly in both profiles.
chemical weathering Eu anomely critical zone soil weathering
Lifeng Cui Zhiqi Zhao Congqiang Liu Sheng Xu Taoze Liu Chenglong Tu Hu Ding
State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Acdemy of Scien Scottish Universities of Environmental Research Centre,Glasgow,G75 0QF,UK
国际会议
The 11th International Symposium on Geochemistry of the Earths Surface(GES-11)(第十一届地球表层地球化学国际研讨会)
贵阳
英文
1-4
2017-06-11（万方平台首次上网日期，不代表论文的发表时间）