Major and rare earth element contents and their speciations in ferruginous nodules and host sediments from the Barents Sea, supplement to: Strekopytov, Stanislav V; Dubinin, Alexander V (2001): On the geochemistry of ferriginous concretions of the Barents Sea. Translated from Okeanologiya, 2001, 41(3), 386-393, Oceanology, 41(3), 367-374

• Main Authors: Strekopytov, Stanislav V, Dubinin, Alexander V
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2001
• Subjects: Box corer; Grab; ASV11; Akademik Sergey Vavilov; Archive of Ocean Data ARCOD; Barents Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.761137; https://doi.pangaea.de/10.1594/PANGAEA.761137

Contents of Fe, Mn, Al, P, and rare earth elements (REE) in ferruginous nodules and host sediments of the eastern Barents Sea were studied. A direct Fe-P correlation in reactive components of the sediments and nodules was found. The nodules were shown to be formed through Fe(II) oxidation in the surface layer of sediments and cementation of terrigenous fraction of sediments by Fe(III) oxyhydroxides. The latter accumulate phosphorus due to processes of sorption - co-precipitation, by forming Fe(III) hydrophosphates. REE composition in the sediments and nodules normalized to NASC contents is characterized by increased proportion of light REE that may be caused by regional features of their sources. Due to significant share of terrigenous matter in the Fe nodules (up to 65% for Nd), REE composition of bulk samples is similar to that of host sediments. A negative cerium anomaly in composition of reactive REE may result from REE sorption from seawater. REE bulk composition of a ferruginous crust is closer to that of seawater than one of the ferruginous nodules from the sediments because of essentially lower content of diluent terrigenous matter.