Rare earth element contents in high pCO2 groundwaters of Sakhalin Island (the Far East of Russia)

被引:0
|
作者
Chelnokov, George [1 ,3 ]
Bragin, Ivan [1 ,3 ]
Kharitonova, Natalia [1 ,2 ,3 ]
机构
[1] RAS, Far East Geol Inst, FEB, Prospect 100-Letya 159, Vladivostok 690022, Russia
[2] Lomonosov Moscow State Univ, Fac Geol, Moscow, Russia
[3] Russian Acad Sci, Geol Inst, Moscow, Russia
基金
俄罗斯科学基金会;
关键词
D O I
10.1051/e3sconf/20199801008
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
The geochemistry of rare earth elements in cold, high pCO(2) mineral waters was studied through the sampling of springs and boreholes of Sakhalin Island (the Russian Far East). The main common features of studied waters are the Na-Cl-HCO3 hydrochemical type, high TDS (6-20 g/L), alkaline pH (6.2-7.4), and reducing environment (-195 to +62 mV). The North American Shale Composite-normalized patterns of groundwaters exhibited a heavy REEs enrichment with high positive Eu anomalies. Both, positive and negative Ce anomalies were detected in CO2-rich mineral waters. The distinct positive Eu/Eu* in waters indicates water-rock interaction processes and positive Ce/Ce* corresponds to reducing conditions. The various processes responsible for negative Ce anomaly in reducing environment are described.
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页数:5
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