Rare earth elements in ferromanganese nodules of the Chukchi Sea

被引：0
|
作者：
O. N. Kolesnik
A. N. Kolesnik
机构：
[1] Russian Academy of Sciences,Il’ichev Pacific Oceanological Institute, Far East Branch
来源：
Lithology and Mineral Resources | 2015年 / 50卷
关键词：
Iron Phosphate; Ferromanganese Crust; Rare Earth Element; Ferromanganese Nodule; Manganese Hydroxide;
D O I：
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中图分类号：
学科分类号：
摘要：
Data on the morphology, microstructure, and chemical and mineral compositions of ferromanganese nodules (FMN) in the Chukchi Sea are presented. Specific features of the distribution and mineral modes of rare earth elements (REE) and yttrium are examined. The studied nodules are characterized by low contents of total REE along with negative Ce and weak positive (virtually neutral) Eu anomalies: Σ(REE) 185.26–299.10 ppm, Cean 0.73–0.96, and Euan 1.01–1.13. The Y/Ho ratio varies from 23.19 to 29.88; the ratio of light and heavy REEs (LREE/HREE)NASC, from 0.74 to 1.50. The presence of La-Ce-Pr-Nd-O and La-Ce-Pr-Nd-Al-O micrograins along with monazite, xenotime, and some other more exotic compounds has been established. The majority of geochemical indicators testify to the diagenetic origin of FMN. The most characteristic property of the studied nodules is high (Fe + Mn)/Ti module (up to 295.05).
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页码：181 / 191
页数：10
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