Halbach, Peter (1975): Observation of manganese nodules and encrustations in various lakes of Finland [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.864229, Supplement to: Halbach, P (1976): Mineralogical and geochemical investigations on Finnish lake ores. Bulletin of the Geological Society of Finland, 48(1-2), 33-42, https://doi.org/10.17741/bgsf/48.1-2.004
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Published: 1975 (exact date unknown) • DOI registered: 2016-09-28
Abstract:
The limnic ferromanganese ore concretions in some Finnish lakes are described. Their chemical and mineral compositions have been measured as have their natural surroundings — the latter by means of physico-chemical in-situ analysis. The sources of the nodules' contents are discussed, and a theory based on the calculated precipitation fields of the important ore minerals is presented for the ore formation.
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: 63.351395 * Median Longitude: 26.323438 * South-bound Latitude: 62.237710 * West-bound Longitude: 25.170400 * North-bound Latitude: 63.966571 * East-bound Longitude: 26.900000
Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 0 m
Event(s):
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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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 | Halbach, Peter | |||
| 2 | Latitude of event | Latitude | Halbach, Peter | |||
| 3 | Longitude of event | Longitude | Halbach, Peter | |||
| 4 | Elevation of event | Elevation | m | Halbach, Peter | ||
| 5 | Sample ID | Sample ID | Halbach, Peter | |||
| 6 | DEPTH, sediment/rock | Depth sed | m | Halbach, Peter | Geocode | |
| 7 | Position | Position | Halbach, Peter | |||
| 8 | Deposit type | Deposit type | Halbach, Peter | |||
| 9 | Quantity of deposit | Quantity | Halbach, Peter | |||
| 10 | Size | Size | Halbach, Peter | |||
| 11 | Shape | Shape | Halbach, Peter | |||
| 12 | Substrate type | Substrate | Halbach, Peter | |||
| 13 | Description | Description | Halbach, Peter | |||
| 14 | Uniform resource locator/link to image | URL image | Halbach, Peter |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
37 data points
Data
| 1 Event | 2 Latitude | 3 Longitude | 4 Elevation [m] | 5 Sample ID | 6 Depth sed [m] | 7 Position | 8 Deposit type | 9 Quantity | 10 Size | 11 Shape | 12 Substrate | 13 Description | 14 URL image |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Salahmijarvi_H | 63.8499 | 26.8999 | 109 | Salahmijarvi_H-1 | 0 | Surface | Mn nodule | Several | |||||
| Rotimojarvi_H | 63.9666 | 26.9000 | 156 | Rotimojarvi_H-1 | 0 | Surface | Mn nodule | Several | 0.1-0.5 cm | Spherical | The pisolithic ores are spherical or pear shaped and vary in diameter from several mm to 1.6 cm. | hdl:10013/epic.48491.d001 | |
| Kirrinjarvi_H | 62.2377 | 25.1704 | 111 | Kirrinjarvi_H-1 | 0 | Surface | Mn nodule | Several | 1.5-6.0 cm | Discoidal | Core; rock fragment | Penny ores consisting of flattened discoids with on many samples a margin tilting upwards. The surface is granulous and often includes a nucleus of detrital grains or rock fragments. Thickness is 0.4 to 1.5 cm and the diameters are about 1.5 to 6.0 cm. | hdl:10013/epic.48491.d002 |
| Kirrinjarvi_H | 62.2377 | 25.1704 | 111 | Kirrinjarvi_H-2 | 0 | Surface | Mn crust | Several | 10.0 cm | Discoidal | The crust ores sometimes consist of large saucer-shaped nodules | hdl:10013/epic.48491.d003 | |
| Kirrinjarvi_H | 62.2377 | 25.1704 | 111 | Kirrinjarvi_H-3 | 0 | Surface | Mn crust | Several | 10.0 cm | Flat | Most Mn crusts are flattened and usually intergrown incrustations several cm thick | hdl:10013/epic.48491.d004 |