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  • NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS  (3)
  • PANGAEA  (3)
  • American Physical Society (APS)
  • Oxford University Press
  • 1970-1974  (3)
  • 1973  (2)
  • 1971  (1)
Collection
Keywords
Publisher
  • PANGAEA  (3)
  • American Physical Society (APS)
  • Oxford University Press
Years
  • 1970-1974  (3)
Year
  • 1
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    Unknown
    Analysis of manganese nodules from the East Pacific (1973)
    PANGAEA
    In:  Supplement to: Piper, David Z (1973): Origin of metalliferous sediments from the East Pacific Rise. Earth and Planetary Science Letters, 19(1), 75-82, https://doi.org/10.1016/0012-821X(73)90179-9
    Details
    Publication Date: 2023-08-28
    Description: The distribution of several metals in East Pacific Rise sediments, when normalized to Al2O3, exhibit stronger maxima near the rise crest than when simply plotted on a carbonate-free basis. The similarity (1) between the distribution of metals in ridge sediments and previously measured mean heat flow values and (2) between the composition of crestal sediments and terrestrial ore bodies associated with greenstone belts, strongly supports a hydrothermal origin for rise crest sediments.
    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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    Chemical composition of Lake George (New York) iron-manganese nodules and underlying sediment (1971)
    PANGAEA
    In:  Supplement to: Schoettle, Manfred; Friedman, Gerald M (1971): Fresh water iron-manganese nodules in Lake George, New York. Geological Society of America Bulletin, 82(1), 101-110, https://doi.org/10.1130/0016-7606(1971)82%5B101:FWINIL%5D2.0.CO;2
    Details
    Publication Date: 2023-08-28
    Description: Lake George, New York, is the site of a new discovery of iron-manganese nodules. These nodules occur at a water depth between 21 and 36 m along a stretch of lake extending for about 5 mi north and south of the Narrows, a constricted island-dotted area which separates the north and south Lake George basins. Nodules occur on or within the uppermost 5 cm of a varved glacial clay. Some areas are solidly floored with a carpet of nodules in areas where active currents keep the nodules exposed. The nodules form around nuclei which consist of clay and less commonly of spore capsules, detrital particles, or bark. By their shape we recognize three types of nodules: spherical, discoidal, and lumps. On X-ray examination all nodules show small goethite peaks; in one nodule the manganese mineral birnessite was identified. Manganese and part of the iron appears to be in X-ray amorphous ferromanganese compounds. The Lake George nodules are enriched in iron with respect to marine nodules but are lower in manganese. They have a higher trace element concentration than nodules from other known freshwater lake occurrences, but a lower concentration than marine nodules.
    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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    Analysis of Mn-nodules from the Indian Ocean (1973)
    PANGAEA
    In:  Supplement to: Bezrukov, Panteleimon L; Andrushchenko, Polina F (1973): Iron-manganese concretions of the Indian Ocean. International Geology Review, 15(3), 342-356, https://doi.org/10.1080/00206817309475894
    Details
    Publication Date: 2023-08-28
    Description: This report studies the principal paramters governing the distribution of iron-manganese concretions on the sea floor of the Indian Ocean, as well as their petrography and mineralogy. The results are mainly based on the recoveries made during voyages 31, 33 and 35 of the "Vityaz"' (1959-1962) and partly during voyages 36 and 41 (1964-1966). During these voyages samples of Mn concretions and Mn crust were collected (by bottom grabs, cores, trawlings, and dredgings) at 39 stations. The following account is devoted to the problems concerning the geochemistry of these concretions.
    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
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