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  • NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS  (3)
  • PANGAEA  (3)
  • Nature Publishing Group
  • 2020-2024
  • 1995-1999  (1)
  • 1985-1989
  • 1980-1984  (2)
  • 1995  (1)
  • 1984  (2)
Collection
Keywords
Publisher
  • PANGAEA  (3)
  • Nature Publishing Group
Years
  • 2020-2024
  • 1995-1999  (1)
  • 1985-1989
  • 1980-1984  (2)
Year
  • 1
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    Unknown
    Geochemistry on manganese nodules from the Pacific (1984)
    PANGAEA
    In:  Supplement to: Frazer, Jane Z; Fisk, Mary B; Fitzgerald, R; Guy, J (1976): Chemical analyses of manganese nodules, 1975-1976. Scripps Institution of Oceanography, UC San Diego Report, unpublished
    Details
    Publication Date: 2023-08-28
    Description: Manganese nodules have been analysed at the Scripps Institution of Oceanography after having been ground to to a diameter less than 74 microns. Some analysises were performed on pellets by X-ray Emission Spectroscopy for 1000 Seconds. All concentrations have been corrected to 110 degrees Celsius drying conditions (see: https://doi.pangaea.de/10.1594/PANGAEA.854202).
    Keywords: NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 2
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    Unknown
    Sampling sites, lake ore types, and dithionite-soluble Fe and Al in Finnish lake ores (1995)
    PANGAEA
    In:  Supplement to: Carlson, Liisa (1995): Aluminum substitution in goethite in lake ore. Bulletin of the Geological Society of Finland, 67(1), 19-28, https://doi.org/10.17741/bgsf/67.1.002
    Details
    Publication Date: 2023-08-28
    Description: The extent of substitution of Fe by Al in goethite in 32 lake ore samples collected from 11 lakes in Finland varied between 0 and 23 mol-%. The data indicated a negative relationship between Al-substitution and the particle size of lake ore. Differences in the Al-substitution were apparent between sampling sites, suggesting that kinetic and environmental variation in lake ore formation influences the substitution. Non-substituted goethite is formed in coarse-grained sediments with locally high concentrations of Fe due to iron-rich springs. Unit cell edge lengths and volumes of goethite varied as function of Al-subsitution but deviated from the Vegard relationship towards higher values.
    Keywords: NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 3
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    Unknown
    Radionuclide analysis on nodules from MANOP Site (1984)
    PANGAEA
    In:  Supplement to: Moore, Willard S (1984): Thorium and radium isotopic relationships in manganese nodules and sediments at MANOP Site S. Geochimica et Cosmochimica Acta, 48(5), 987-992, https://doi.org/10.1016/0016-7037(84)90190-X
    Details
    Publication Date: 2023-08-28
    Description: Relationships among Th and Ra isotopes in nodule, sediment and water phases at MANOP Site S establish the most likely source for Th in the nodules, the frequency of nodule turning, and the similarity of micro and macro nodules. Manganese nodules and bottom waters have 230Th/232Th activity ratios considerably higher than other phases at this site suggesting that sea water is the likely source of Th for the nodules. Similar 230Th/232Th activity ratios in nodule tops and bottoms and in certain cases departure from expected 226Ra/230Th activity ratios in nodule tops and bottoms indicate that the nodules rotate every one to ten thousand years. The micro nodules have diffusion coefficients of Ra similar to macro nodule bottoms. I suggest that they may act as a carrier phase for transporting metals through oxic sediments to nodules.
    Keywords: NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
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