Boström, Kurt; Wiborg, L; Ingri, J (1982): Annotated record of the detailed examination of ferromanganese concretions from the Gulf of Bothnia in the Baltic Sea [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.858582, Supplement to: Boström, K et al. (1982): Geochemistry and origin of ferromanganese concretions in the Gulf of Bothnia. Marine Geology, 50(1-2), 1-24, https://doi.org/10.1016/0025-3227(82)90058-5
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Abstract:
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.
Source:
Grant, John Bruce; Moore, Carla J; Alameddin, George; Chen, Kuiying; Barton, Mark (1992): The NOAA and MMS Marine Minerals Geochemical Database. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V52Z13FT
Further details:
Warnken, Robin R; Virden, William T; Moore, Carla J (1992): The NOAA and MMS Marine Minerals Bibliography. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V53X84KN
Project(s):
Coverage:
Median Latitude: 64.083559 * Median Longitude: 21.345046 * South-bound Latitude: 60.783330 * West-bound Longitude: 17.716670 * North-bound Latitude: 65.166670 * East-bound Longitude: 23.866670
Date/Time Start: 1977-01-01T00:00:00 * Date/Time End: 1977-01-01T00:00:00
Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 0 m
Event(s):
NRM_76-19 * Latitude: 64.550000 * Longitude: 21.633330 * Elevation: -37.0 m * Location: Bothnian Bay * Campaign: NRM_76-77 * Basis: Strombus * Method/Device: Dredge (DRG) * Comment: University of Lulea
NRM_76-23 * Latitude: 64.783330 * Longitude: 21.525000 * Elevation: -37.0 m * Location: Bothnian Bay * Campaign: NRM_76-77 * Basis: Strombus * Method/Device: Dredge (DRG) * Comment: University of Lulea
NRM_76-25 * Latitude: 64.933330 * Longitude: 21.625000 * Elevation: -38.0 m * Location: Bothnian Bay * Campaign: NRM_76-77 * Basis: Strombus * Method/Device: Dredge (DRG) * Comment: University of Lulea
Comment:
From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Boström, Kurt | |||
| 2 | Latitude of event | Latitude | Boström, Kurt | |||
| 3 | Longitude of event | Longitude | Boström, Kurt | |||
| 4 | Elevation of event | Elevation | m | Boström, Kurt | ||
| 5 | Method/Device of event | Method/Device | Boström, Kurt | |||
| 6 | Identification | ID | Boström, Kurt | |||
| 7 | DEPTH, sediment/rock | Depth sed | m | Boström, Kurt | Geocode | |
| 8 | Position | Position | Boström, Kurt | Visual description | ||
| 9 | Deposit type | Deposit type | Boström, Kurt | |||
| 10 | Shape | Shape | Boström, Kurt | |||
| 11 | Quantity of deposit | Quantity | Boström, Kurt | |||
| 12 | Substrate type | Substrate | Boström, Kurt | |||
| 13 | Sediment type | Sediment | Boström, Kurt | |||
| 14 | Comment | Comment | Boström, Kurt | |||
| 15 | Description | Description | Boström, Kurt | |||
| 16 | Sample code/label | Sample label | Boström, Kurt | Label of storage box at the Swedish Museum of Natural History, Stockholm (NRM) (NRMBox) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
444 data points