Systematics of REE, Sc, Cr, Zr, and Th in Surface Bottom Sediments of the Nordic Seas

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.