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  • 1
    Electronic Resource
    Electronic Resource
    10 Be-dating of a manganese crust from Central North Pacific and implications for ocean palaeocirculation (1984)
    [s.l.] : Nature Publishing Group
    Nature 309 (1984), S. 540-543 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] During RV Valdivia cruise VA 13-2, 1976, a very thick ferromanganese crust (20-40 cm) was dredged near the summit of a submarine peak at a depth of 4,830m in the Central Pacific7'8. In this crust, which directly overlies altered basaltic rock, three macroscopically distinguishable main zones (top ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/309540a0
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Analysis of spherules from Pacific Ocean sediments (1976)
    PANGAEA
    In:  Supplement to: Friedrich, G; Schmitz-Wiechowski, A (1976): Mikroskopische und mikroanalytische Untersuchungen an metallischen Kügelchen aus Tiefseesedimenten des Zentralen Pazifik. Marine Geology, 20(3), 239-250, https://doi.org/10.1016/0025-3227(76)90118-3
    Details
    Publication Date: 2023-08-28
    Description: Metallic spherules from Central Pacific Ocean sediments (“Valdivia” expedition VA-05/1, 1973) were studied by means of microscopy and by electron microprobe analysis. The data suggest that most of the spherules are of meteoritic origin, i.e. ablation drops from meteorites as suggested in former studies on spherules from marine environment by Schmidt and Keil (1966), Finkelmann (1970, 1972) and others. The metallic spherules contain up to about 60% Ni, 37% Fe and 3% Co. Unusually high contents of Cr (up to 12%) were noted in some spherules. Some specimen being coated with Fe oxide could be mistaken for manganese micronodules always abundant in the sediments of the Central Pacific Ocean.
    Keywords: Dredge; DRG; Location 20; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Pacific Ocean; VA-05/1; VA-05/1_20; Valdivia (1961)
    Type: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
  • 3
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    Anotated record of the detailed examination of cosmic spherules retrieved from surface sediments of the Central Pacific Ocean (1976)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Keywords: Deposit type; DEPTH, sediment/rock; Description; Dredge; DRG; Identification; Location 20; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Pacific Ocean; Position; Quantity of deposit; Sediment type; Size; VA-05/1; VA-05/1_20; Valdivia (1961); Visual description
    Type: Dataset
    Format: text/tab-separated-values, 14 data points
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    DATA PANGAEA
  • 4
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    Chemical composition of cosmic spherules from surface sediments of the Central Pacific Ocean (1976)
    PANGAEA
    Details
    Publication Date: 2024-04-16
    Keywords: Chromium; Cobalt; Deposit type; DEPTH, sediment/rock; Description; Dredge; DRG; Identification; Inductively coupled plasma atomic emission spectroscope (ICP-AES); Iron; Location 20; Nickel; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Pacific Ocean; VA-05/1; VA-05/1_20; Valdivia (1961)
    Type: Dataset
    Format: text/tab-separated-values, 96 data points
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    DATA PANGAEA
  • 5
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    Chemical analysis of various layers forming a ferromanganese crust retrieved in the Pacific Ocean (VA 13/2 - 237KD) (2022)
    PANGAEA
    Details
    Publication Date: 2024-04-20
    Description: During Valdivia cruise VA 13/2 dredging brought exceptionnally thick Mn crusts on top of basalt. One of these deposits is 22 cm thick and consists of three main zones and numerous subzones and layers. On the basis of the macroscopically visible zoning pattern and the natural planes of separation between subzones or layers, chemical analyses were carried out for Mn, Fe, Ni, Cu, Co, and Ba by atomic absorption spectroscopy (AAS), U by delayed neutron activation analysis, and Ce and La by energy-dispersive X-ray analysis.
    Keywords: Aluminium oxide; Atomic absorption spectrometry (AAS); Barium; Cerium; Cobalt; Copper; Deposit type; DEPTH, sediment/rock; DISTANCE; Dredge; DRG; Elevation of event; Energy dispersive X-ray analysis, EDAX; Event label; Geochemistry; Identification; Image; Iron; Lanthanum; Latitude of event; Longitude of event; Manganese; manganese micronodule; manganese nodule; Neutron activation analysis; Nickel; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Pacific Ocean; sediment; Silicon dioxide; Uranium; VA-13/2; VA13-2-237KD; Valdivia (1961); Zinc
    Type: Dataset
    Format: text/tab-separated-values, 279 data points
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    DATA PANGAEA
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