Annotated record of the detailed examination of ferromanganese concretions from the Gulf of Bothnia in the Baltic Sea
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| Main Authors: | , , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
1982
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| _version_ | 1867169110717104128 |
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| author | Boström, Kurt Wiborg, L Ingri, J |
| author_facet | Boström, Kurt Wiborg, L Ingri, J |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Ferromanganese concretions cover large areas of the Gulf of Bothnia. They are flat to well-rounded, the rounded ones being richer in oxyhydroxides of iron and manganese. Rounded and ellipsoidal nodules, particularly those in the northern Gulf of Bothnia, are richest in Mn, Ni, Ba and Cu, which probably coexist in a Mn oxyhydroxide phase. Flat nodules are enriched in Fe, P, rare earths and As, probably associated with an Fe oxy-hydroxide component. Aluminum, V, Cr and Ti occur in still another phase. The sediments of the gulf generally consist of a 10-50 mm-thick layer of oxidized surface sediment, enriched in Mn, Ba, P and Ni lying on top of reduced sediments which are diagenetically depleted in these elements. The remobilized elements have redeposited in the nodules, but this process cannot explain the origin of all the nodular material. Some released Mn, Ba and Ni furthermore enter into suspended phases, which eventually leave the Baltic Sea. The economic value of the nodules in the Gulf of Bothnia is probably limited at present. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_858582 |
| institution | PANGAEA |
| language | en |
| publishDate | 1982 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Annotated record of the detailed examination of ferromanganese concretions from the Gulf of Bothnia in the Baltic Sea Boström, Kurt Wiborg, L Ingri, J Bothnian Bay; Bothnian Bay, Skelleftea area; Bothnian Sea; Comment; Deposit type; DEPTH, sediment/rock; Description; Dredge; DRG; Elevation of event; Event label; Identification; Latitude of event; Longitude of event; Method/Device of event; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; North Kvarken; NRM_76-19; NRM_76-23; NRM_76-25; NRM_76-26; NRM_76-28; NRM_76-29; NRM_76-30; NRM_76-77; NRM_77-12; NRM_77-13; NRM_77-14; NRM_77-16; NRM_77-22; NRM_77-27; NRM_77-29; NRM_77-3; NRM_77-31; NRM_77-32; NRM_77-37; NRM_77-38; NRM_77-40B; NRM_77-41; NRM_77-43; NRM_77-45; Position; Quantity of deposit; Sample code/label; Sediment type; Shape; SNV_76-15; SNV_76-17A; SNV_76-18C; SNV_76-19C; SNV_76-21E; SNV_76-23C; SNV_76-26C; SNV_76-27C; SNV_76-52A; SNV_76-53B; SNV_76-70; SNV_76-71D; SNV_76-74C; SNV_76-75D; Strombus; Substrate type; Visual description Ferromanganese concretions cover large areas of the Gulf of Bothnia. They are flat to well-rounded, the rounded ones being richer in oxyhydroxides of iron and manganese. Rounded and ellipsoidal nodules, particularly those in the northern Gulf of Bothnia, are richest in Mn, Ni, Ba and Cu, which probably coexist in a Mn oxyhydroxide phase. Flat nodules are enriched in Fe, P, rare earths and As, probably associated with an Fe oxy-hydroxide component. Aluminum, V, Cr and Ti occur in still another phase. The sediments of the gulf generally consist of a 10-50 mm-thick layer of oxidized surface sediment, enriched in Mn, Ba, P and Ni lying on top of reduced sediments which are diagenetically depleted in these elements. The remobilized elements have redeposited in the nodules, but this process cannot explain the origin of all the nodular material. Some released Mn, Ba and Ni furthermore enter into suspended phases, which eventually leave the Baltic Sea. The economic value of the nodules in the Gulf of Bothnia is probably limited at present. |
| title | Annotated record of the detailed examination of ferromanganese concretions from the Gulf of Bothnia in the Baltic Sea |
| topic | Bothnian Bay; Bothnian Bay, Skelleftea area; Bothnian Sea; Comment; Deposit type; DEPTH, sediment/rock; Description; Dredge; DRG; Elevation of event; Event label; Identification; Latitude of event; Longitude of event; Method/Device of event; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; North Kvarken; NRM_76-19; NRM_76-23; NRM_76-25; NRM_76-26; NRM_76-28; NRM_76-29; NRM_76-30; NRM_76-77; NRM_77-12; NRM_77-13; NRM_77-14; NRM_77-16; NRM_77-22; NRM_77-27; NRM_77-29; NRM_77-3; NRM_77-31; NRM_77-32; NRM_77-37; NRM_77-38; NRM_77-40B; NRM_77-41; NRM_77-43; NRM_77-45; Position; Quantity of deposit; Sample code/label; Sediment type; Shape; SNV_76-15; SNV_76-17A; SNV_76-18C; SNV_76-19C; SNV_76-21E; SNV_76-23C; SNV_76-26C; SNV_76-27C; SNV_76-52A; SNV_76-53B; SNV_76-70; SNV_76-71D; SNV_76-74C; SNV_76-75D; Strombus; Substrate type; Visual description |
| url | https://doi.org/10.1594/PANGAEA.858582 |