Rozanov, Alexander G; Volkov, Igor I; Kokryatskaya, Natalya M; Yudin, M V (2006): Iron and manganese in bottom sediments and interstitial waters sampled in the White Sea on August 21-30, 2003 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.786641, Supplement to: Rozanov, AG et al. (2006): Manganese and iron in the White Sea: Sedimentation and diagenesis. Translated from Litologiya i Poleznye Iskopaemye, 2006, 5, 539-558, Lithology and Mineral Resources, 41(5), 483-501, https://doi.org/10.1134/S0024490206050087
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Abstract:
Iron and manganese in bottom sediments studied along the sublatitudinal transect from Kandalaksha to Arkhangelsk are characterized by various contents and speciations depending on sedimentation environment, grain size of sediments, and diagenetic processes. The latter include redistribution of reactive forms leading to enrichment in Fe and Mn of surface sediments, formation of films, incrustations, and ferromanganese nodules. Variations in total Fe content (2-8%) are accompanied by changes in concentration of its reactive forms (acid extraction) and concentration of dissolved Fe in interstitial waters (1-14 µM). Variations in Mn content in bottom sediments (0.03-3.7%) and interstitial waters (up to 500 µM) correspond to high diagenetic mobility of this element. Changes in oxidation degree of chemical elements result in redox stratification of sediment strata with maximum concentrations of Fe, Mn, and sulfides. Organic matter of bottom sediments with considerable terrestrial constituent is oxidized by bottom water oxygen mainly at the sediment surface or in anaerobic conditions within the sediment strata. The role of inorganic components in organic matter oxidation changes from surface layer bottom sediments (where manganese oxyhydroxide dominates among oxidants) to deeper layers (where sulfate of interstitial water serves as the main oxidant). Differences in river runoff and hydrodynamics are responsible for geochemical asymmetry of the transect. The deep Kandalaksha Bay serves as a sediment trap for manganese (Mn content in sediments varies within 0.5-0.7%), whereas the sedimentary environment in the Dvina Bay promotes its removal from bottom sediments (Mn 0.05%).
Project(s):
Archive of Ocean Data (ARCOD)
Coverage:
Median Latitude: 65.781843 * Median Longitude: 36.562642 * South-bound Latitude: 64.621333 * West-bound Longitude: 33.847167 * North-bound Latitude: 66.656833 * East-bound Longitude: 39.565333
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets
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Datasets listed in this publication series
- Rozanov, AG; Volkov, II; Kokryatskaya, NM et al. (2006): (Table a) Iron and manganese in bottom sediments and interstitial waters sampled by grabs in the White Sea on August 21-30, 2003. https://doi.org/10.1594/PANGAEA.786634
- Rozanov, AG; Volkov, II; Kokryatskaya, NM et al. (2006): (Table b) Iron and manganese in bottom sediments and interstitial waters sampled by Niemistoe corers in the White Sea on August 21-30, 2003. https://doi.org/10.1594/PANGAEA.786635
- Rozanov, AG; Volkov, II; Kokryatskaya, NM et al. (2006): (Table c) Iron and manganese in bottom sediments and interstitial waters sampled by gravity corers in the White Sea on August 21-30, 2003. https://doi.org/10.1594/PANGAEA.786640