Distribution and sources of rare earth elements in ornithogenic sediments from the Ross Sea region, Antarctica

被引：27

作者：

Nie, Yaguang ^{[1
]}

Liu, Xiaodong ^{[1
]}

Emslie, Steven D. ^{[2
]}

机构：

[1] Univ Sci & Technol China, Inst Polar Environm, Sch Earth & Space Sci, Hefei 230026, Anhui, Peoples R China

[2] Univ N Carolina, Dept Biol & Marine Biol, Wilmington, NC 28403 USA

来源：

MICROCHEMICAL JOURNAL | 2014年 / 114卷

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

Rare earth elements; Geochemical behavior; Omithogenic sediments; Ross Sea region; Adelie penguin; KING-GEORGE ISLAND; TRACE-ELEMENTS; PENGUIN; GEOCHEMISTRY; SOILS; PALEOECOLOGY; POPULATION; RECORD; CORES;

D O I：

10.1016/j.microc.2014.01.010

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Concentrations of rare earth elements (REEs) were determined in three ornithogenic sediment profiles excavated at active Adelie penguin (Pygoscelis adeliae) colonies in McMurdo Sound, Ross Sea, Antarctica. The distribution of REEs in each profile fluctuated with depth. REEs measured in environmental media (including bedrock, guano, and algae) and analysis on the correlations of Sigma REE-lithological elements and Sigma REE-bio-elements in the profiles indicated that sedimentary REEs were mainly from weathered bedrock in this area, and the non-crustal biogenetic REEs from guano and algae were minor. Further discussion on the slopes and Ce and Eu anomalies of chondrite-normalized REE patterns indicated that a mixing process of weathered bedrock, guano and algae was the main controlling factor for the fluctuations of REEs with depth in the sediments. An end-member equation was developed to calculate the proportion of REEs from the three constituents in the sediments. The calculation functioned well in estimating bedrock-derived REEs and the magnitude of ornithogenic influence in different profiles. In general, REEs in the ornithogenic sediments showed anti bio-element patterns and thus can be used as an additional proxy to reconstruct historical penguin populations. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：247 / 260

页数：14

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