Isotope composition of neodymium in neo-Archean banded iron formations of Karelia and Kola Peninsula

Studies of three deposits of neo-Archean banded iron formations from the West Karelian domain (the Kostomuksha deposit) and from the Central Kola block (the Olenegorsk and Kirovogorsk deposits) showed a pronounced difference in the isotope compositions of Nd from quartz and magnetite–hematite interl...

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Bibliographic Details
Published in:Doklady earth sciences 2015-12, Vol.465 (2), p.1268-1271
Main Authors: Felitsyn, S. B., Bogomolov, E. S., Alfimova, N. A.
Format: Article
Language:English
Subjects:
Earth and Environmental Science
Earth Sciences
Geochemistry
Hematite
Iron
Isotopes
Magnetic alloys
Magnetite
Neodymium
Quartz
Sediments
Studies
Volcanism
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Summary:Studies of three deposits of neo-Archean banded iron formations from the West Karelian domain (the Kostomuksha deposit) and from the Central Kola block (the Olenegorsk and Kirovogorsk deposits) showed a pronounced difference in the isotope compositions of Nd from quartz and magnetite–hematite interlayers. The less radiogenic Nd of iron-containing layers compared to that of the quartz component may be considered as an indication of the formation mechanism of the treated banded iron formations. Thus, silicon-containing layers are related to submarine volcanism and iron was supplied to the sedimentation zone from other sources.
ISSN:1028-334X
1531-8354
DOI:10.1134/S1028334X15120119