Johnson, C E; Glasby, Geoffrey P (1969): (Table 1, page 376), Composition of manganese deposits from the Gulf of Aden and the Carlsberg Ridge [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.847756, Supplement to: Johnson, CE; Glasby, GP (1969): Mössbauer Effect determination of particle size in microcrystalline iron-manganese nodules. Nature, 222(5191), 376-377, https://doi.org/10.1038/222376a0
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Abstract:
Iron-manganese nodules from the ocean floor have been extensively studied. But, because of the fine grain size of the particles of the nodules, structural identification by X-ray and electron diffraction techniques is difficult and the mineralogy of the iron oxide phase has not been well characterized. The observation of the Mössbauer spectrum-in which each nucleus absorbs gamma-rays independently-is not limited by particle size in the same way as is the observation of Bragg peaks in diffraction measurements, in which radiation must be scattered coherently from a large number of atoms. The magnetic hyperfine splitting in the Mössbauer spectrum of magnetic materials is affected, however, when the particles are so small that they become superparamagnetic. We describe here an investigation using the 57Fe Mössbauer effect of two iron-manganese nodules in which the iron oxide phase could not be detected by X-ray or electron diffraction.
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: 7.744165 * Median Longitude: 53.849165 * South-bound Latitude: 2.915000 * West-bound Longitude: 47.658330 * North-bound Latitude: 12.573330 * East-bound Longitude: 60.040000
Date/Time Start: 1967-03-12T22:00:00 * Date/Time End: 1967-04-08T04:00:00
Minimum Elevation: -4042.0 m * Maximum Elevation: -2405.0 m
Event(s):
D6243 * Latitude: 12.573330 * Longitude: 47.658330 * Date/Time: 1967-03-12T22:00:00 * Elevation: -2405.0 m * Location: Gulf of Aden * Campaign: D16 * Basis: Discovery (1962) * Method/Device: Dredge, rock (DRG_R)
D6273 * Latitude: 2.915000 * Longitude: 60.040000 * Date/Time: 1967-04-08T04:00:00 * Elevation: -4042.0 m * Location: Indian Ocean, Carlsberg Ridge * Campaign: D16 * Basis: Discovery (1962) * Method/Device: Dredge, rock (DRG_R)
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 | Johnson, C E | |||
| 2 | Sample ID | Sample ID | Johnson, C E | |||
| 3 | Description | Description | Johnson, C E | |||
| 4 | Manganese | Mn | % | Johnson, C E | Mössbauer spectroscopy | |
| 5 | Iron | Fe | % | Johnson, C E | Mössbauer spectroscopy | |
| 6 | Silicon dioxide | SiO2 | % | Johnson, C E | Mössbauer spectroscopy | |
| 7 | Titanium | Ti | % | Johnson, C E | Mössbauer spectroscopy | |
| 8 | Vanadium | V | % | Johnson, C E | Mössbauer spectroscopy | |
| 9 | Chromium | Cr | % | Johnson, C E | Mössbauer spectroscopy | |
| 10 | Cobalt | Co | % | Johnson, C E | Mössbauer spectroscopy | |
| 11 | Nickel | Ni | % | Johnson, C E | Mössbauer spectroscopy | |
| 12 | Copper | Cu | % | Johnson, C E | Mössbauer spectroscopy | |
| 13 | Zinc | Zn | % | Johnson, C E | Mössbauer spectroscopy | |
| 14 | Zirconium | Zr | % | Johnson, C E | Mössbauer spectroscopy | |
| 15 | Molybdenum | Mo | % | Johnson, C E | Mössbauer spectroscopy | |
| 16 | Lead | Pb | % | Johnson, C E | Mössbauer spectroscopy | |
| 17 | Minerals, surface area | MSA | m2/g | Johnson, C E |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
31 data points