Abstract
The systematics of REE, Sc, Cr, Zr, and Th in silty-pelitic and pelitic surface bottom sediments sampled during cruises 71, 75, 77, and 80 of the R/V Akademik Mstislav Keldysh in the Nordic Seas is considered. It is shown that the geochemical features of silts in a number of regions (the southern part of the Kolbeinsei Ridge, the continental slope of Norway, the northern end of Mona Ridge) indicate the presence in their composition of a significant (30–40%) proportion of erosion products of basic rocks. Other possible source rock assemblages of fine-grained aluminosiliciclastics for the analyzed bottom sediments were apparently similar in their geochemical characteristics to the basement rocks, supracrustal formations, and leucogranites of the Caledonides of East Greenland, the anorthosite–mangerite–charnockite–granite (AMCG) association of the Lofoten Islands, and a number of other objects.
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ACKNOWLEDGMENTS
We are grateful to S.M. Isachenko, G.V. Malafeev, and the crew of R/V Akademik Mstislav Keldysh for help in expeditions. The advice and comments of the anonymous reviewer contributed significantly to improvement of the manuscript.
Funding
The expeditionary studies were conducted within the framework of a State Assignment of the Institute of Oceanology, Russian Academy of Sciences (FMWE-2021-0006), and the study of bottom sediments, by a State Assignment of the Geological Institute, Russian Academy of Sciences .
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Translated by D. Voroshchuk
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Maslov, A.V., Politova, N.V., Klyuvitkin, A.A. et al. Systematics of REE, Sc, Cr, Zr, and Th in Surface Bottom Sediments of the Nordic Seas. Dokl. Earth Sc. 507, 1124–1131 (2022). https://doi.org/10.1134/S1028334X22600876
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DOI: https://doi.org/10.1134/S1028334X22600876