Schwertmann, U; Carlson, L; Murad, E (1987): (Table 2, page 299) Chemical and mineral compositions of the samples (air-dry basis) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.854199, In supplement to: Schwertmann, U et al. (1987): Properties of iron oxides in two Finnish lakes in relation to the environment of their formation. Clays and Clay Minerals, 35(4), 297-304, https://doi.org/10.1346/CCMN.1987.0350407
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Project(s):
Coverage:
Median Latitude: 61.963640 * Median Longitude: 28.032335 * South-bound Latitude: 61.483330 * West-bound Longitude: 25.900000 * North-bound Latitude: 62.443950 * East-bound Longitude: 30.164670
Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 0 m
Event(s):
Comment:
The lake ores were powdered in an agate ball mill for 20 minutes (< 50 µm).
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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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 | Schwertmann, U | |||
| 2 | Latitude of event | Latitude | Schwertmann, U | |||
| 3 | Longitude of event | Longitude | Schwertmann, U | |||
| 4 | Elevation of event | Elevation | m | Schwertmann, U | ||
| 5 | Sample ID | Sample ID | Schwertmann, U | |||
| 6 | DEPTH, sediment/rock | Depth sed | m | Schwertmann, U | Geocode | |
| 7 | Carbon, total | TC | % | Schwertmann, U | Wösthoff carmograph | |
| 8 | Iron, soluble | Fe sol | % | Schwertmann, U | Photometry, dithionite-soluble fraction | |
| 9 | Iron, soluble | Fe sol | % | Schwertmann, U | Photometry, oxalate-soluble fraction | |
| 10 | Manganese, soluble | Mn sol | % | Schwertmann, U | AAS, dithionite-soluble fraction | |
| 11 | Manganese, soluble | Mn sol | % | Schwertmann, U | AAS, oxalate-soluble fraction | |
| 12 | Silicon | Si | % | Schwertmann, U | Wet chemistry | |
| 13 | Minerals | Minerals | Schwertmann, U | X-ray diffraction (XRD) | Iron and manganese oxides |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
120 data points