Distribution pattern and geochemical analysis of rare earth elements in deep-ocean sediments  

作　　者：Jingxi LI Chengjun SUN Fenghua JIANG Fenglei GAO Yifan ZHENG 

机构地区：[1]Key Laboratory of Marine Eco-environmental Science and Technology,Marine Bioresource and Environment Research Center,First Institute of Oceanography,Ministry of Natural Resources,Qingdao 266061,China [2]Laboratory of Marine Drugs and Bioproducts,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266071,China

出　　处：《Journal of Oceanology and Limnology》2021年第1期79-88,共10页海洋湖沼学报（英文）

基　　金：Supported by the Basic Scientifi c Fund for National Public Research Institutes of China(No.2020Q10)and the China Ocean Mineral Resources R&D Association(Nos.DY135-E2-1-07,DY135-E2-4)。

摘　　要：The content and distribution pattern of rare earth elements(REEs)in surface sediments from the Eastern and Western Pacifi c Ocean,the Northern and Southern Atlantic Ocean,and the Southwestern Indian Ocean were explored and the resources and geochemical characteristics of REEs in deep-ocean sediments from diff erent oceans were studied.The total REE abundances(ΣREE)in the diff erent oceans ranged as follows:Eastern Pacifi c,56.88–500.02μg/g;Western Pacifi c,290.68–439.94μg/g;Northern Atlantic,55.33–154.90μg/g;Southern Atlantic,40.83–69.30μg/g;and Southwestern Indian Ocean,20.24–64.76μg/g.Their corresponding LREE(La-Eu)/HREE(Gd-Lu)average values were 5.18,5.86,9.01,5.21,and 4.59,which indicated that the light REEs were all evidently enriched.δEu andδCe showed slight Eu-negative anomalies and signifi cant Ce-positive anomalies in all sediments.Although the contents of REEs in the sediments varied among the diff erent oceans,the distribution patterns of REEs were similar,and the correlation coeffi cient was greater than 0.9290.In the Eastern Pacifi c sediments,ΣREE showed a signifi cantly positive correlation with Co,Cu,Zn,Mn,Mo and a weak correlation with Fe.In the Western Pacifi c and Southern Atlantic sediments,ΣREE presented no obvious correlation and a weakly negative correlation with Co,Cu,Zn,Mn,Mo and Fe,respectively.ΣREE in the Southwestern Indian Ocean sediments positively correlated with Cu,Zn,Mn,Mo,Fe,and had a weakly negative correlation with Co.

关 键 词：rare earth elements(REE)geochemistry distribution pattern REE fractionation marine sediment 

分 类 号：P736.41[天文地球—海洋地质]